CDM Smith

 NetSTORM Point Precipitation Frequency Estimates

NetSTORM
Annual Statistics  |  Event Listings  |  Frequency Estimates

Gage IDKBOS
LocationBOSTON LOGAN INTERNATIONAL AIRPORT, MA
LocaleMassachusetts
Lat/Long42.3606, -71.0098
Elevation3 m
Atlas 14 Vol.10
NetworkNOAA


Monthly Statistics
MonthTotalRecordsMeanStandard DeviationMaximumDuration
Jan 3.4274.220.0460.0540.65017.64
Feb 3.2267.880.0470.0540.66018.24
March3.7374.790.0500.0570.68018.03
April3.6567.570.0540.0620.91017.82
May 3.1856.800.0560.0730.98017.76
June 3.2946.770.0700.1081.54015.12
July 3.2037.050.0860.1411.61011.61
Aug 3.3439.440.0850.1412.03011.26
Sep 3.2942.330.0780.1171.58014.58
Oct 3.3651.450.0650.0881.53016.57
Nov 3.6863.180.0580.0740.97018.22
Dec 3.7471.820.0520.0610.81017.34

Hour of Day Statistics
HourJan Feb MarchAprilMay June July Aug Sep Oct Nov Dec TotalRecordsMeanStandard DeviationMaximum
1:000.150.150.160.170.160.110.100.140.120.180.160.171.7728.940.0610.0830.96
2:000.140.140.180.150.150.120.140.120.130.170.170.161.7729.550.0600.0842.03
3:000.150.140.180.170.140.140.130.130.160.180.170.161.8430.650.0600.0841.35
4:000.140.130.170.180.140.130.130.110.170.170.170.171.8130.800.0590.0821.58
5:000.150.130.170.170.140.130.140.120.160.140.170.171.7930.380.0590.0801.17
6:000.150.130.170.150.130.120.150.130.140.140.190.151.7730.510.0580.0801.11
7:000.150.140.170.140.140.130.140.140.150.130.160.171.7730.470.0580.0841.61
8:000.150.140.160.130.130.140.120.170.140.120.140.161.6929.300.0580.0851.56
9:000.140.140.150.130.110.140.120.170.140.120.150.141.6528.240.0590.0821.41
10:000.140.140.160.120.130.120.090.140.140.130.150.141.6128.220.0570.0781.10
11:000.150.150.150.130.130.100.090.130.120.110.150.151.5726.970.0580.0761.10
12:000.150.140.140.130.120.110.120.150.120.130.180.151.6427.510.0590.0821.22
13:000.150.140.140.140.110.120.100.130.160.120.160.161.6427.310.0600.0891.54
14:000.140.130.140.150.100.180.130.160.160.140.130.151.7127.050.0630.0961.63
15:000.130.140.130.150.110.150.170.210.150.130.120.141.7327.140.0640.1031.55
16:000.140.140.150.150.120.200.170.180.130.130.130.141.7828.470.0630.0981.60
17:000.130.130.150.160.140.200.250.170.110.140.120.141.8429.460.0620.0981.34
18:000.130.120.140.160.130.180.190.140.120.120.140.171.7429.180.0600.0841.05
19:000.140.120.160.160.140.120.170.130.130.130.160.171.7229.710.0580.0821.45
20:000.140.120.160.150.140.130.150.130.120.130.140.161.6728.670.0580.0821.09
21:000.130.120.150.160.140.140.130.110.130.120.130.151.6128.090.0570.0780.86
22:000.140.140.150.140.120.140.100.100.140.150.150.161.6328.880.0560.0811.53
23:000.140.140.150.160.150.130.090.120.130.150.150.151.6428.670.0570.0801.38
24:000.150.130.150.180.150.110.080.120.130.160.170.171.7029.150.0580.0781.24


Day of Week Statistics
WeekdayTotalRecordsMeanStandard DeviationMaximumDuration
Sun5.8997.850.0600.0861.6016.14
Mon5.7799.320.0580.0801.6115.66
Tue5.86101.570.0580.0831.6316.28
Wed5.7598.320.0590.0821.3317.07
Thu5.9096.060.0610.0882.0316.05
Fri6.02100.680.0600.0861.5516.32
Sat5.9299.510.0590.0881.5416.61
YearTotalRecordsMeanStandard
Deviation
MaximumDuration
(h)
Interevent
(h)
≥0.00≥0.05≥0.10≥0.25≥0.50≥1.00≥2.00
189436.286610.0550.0801.0716.371938764553726121
189540.116020.0670.0970.9312.931899169634024133
189637.347810.0480.0560.5717.27172917158452992
189740.086350.0630.0830.6711.4117310075654629122
189849.668420.0590.0730.9114.581389481745730154
189934.616060.0570.0901.2215.712138358483826111
190043.976180.0710.0800.6015.951948764554024155
190148.606690.0730.0951.2415.402179067603929155
190233.766040.0560.0670.7314.271999068564026111
190341.247280.0570.0740.6519.071608968644128113
190439.626890.0580.0790.8513.091901037864412262
190532.176120.0530.0841.0017.88217795852332471
190640.696370.0640.0981.5313.9521210076623928122
190737.566550.0570.0780.6815.001899472584323122
190830.045080.0590.0921.5512.27218806557352270
190939.376540.0600.0710.5116.211938260554122103
191028.325580.0510.0600.6515.59188936352381980
191135.776550.0550.0790.9515.921848664583726101
191234.556110.0570.0821.3413.951798664554126111
191338.016790.0560.0760.9117.56184826761412882
191434.276510.0530.0620.5116.771777656503824122
191538.765900.0660.1091.1716.11238796349352294
191637.367850.0480.0711.2717.951991007563382993
191738.996580.0590.0941.2415.322109372553823131
191833.566210.0540.0770.8715.002509671573121122
191942.417530.0560.0760.6617.381838973604230122
192046.137860.0590.0710.5618.261988868584230155
192142.046590.0640.1181.4517.491979161524123104
192241.126240.0660.0890.9217.852027259533821114
192334.726260.0550.0670.5411.83184847162452092
192436.995360.0690.1010.8213.30193796257392282
192540.176430.0620.0830.7013.061598569625226101
192639.285720.0690.1060.9411.611908569554424103
192740.906490.0630.0940.9913.081641007366483390
192838.356360.0600.0890.8913.591758867574329112
192937.156770.0550.0730.7913.571848674584626111
193034.876170.0570.0810.8716.891917963503622102
193143.456950.0630.0810.6119.951998159523728143
193241.616320.0660.0910.7516.392208860513525114
193346.207780.0590.0910.9018.172069568553828113
193434.716280.0550.0790.9113.55205957363402862
193532.946020.0550.0720.6817.322388254443420112
193647.057230.0650.0840.9114.4717510065574529203
193743.376820.0640.0870.8116.331699074614826125
193850.528520.0590.0951.3819.0717310277634624154
193932.426370.0510.0600.3815.10206886754402582
194036.087450.0480.0620.6420.342449964493119131
194130.885660.0550.0750.9715.462267857493722111
194242.477290.0580.0850.8513.801718667554527161
194332.236210.0520.0750.7417.51192996452382263
194437.066500.0570.0960.8519.111967660463726113
194547.288810.0540.0760.9718.3315410781704931123
194638.086180.0620.0851.0915.321848468553822123
194737.905760.0660.1031.3118.222207254483724132
194840.387710.0520.0730.9618.22159917766483292
194931.566040.0520.0881.5812.67187896960412442
195032.717000.0470.0700.6718.252369468583616101
195146.978110.0580.0760.7415.3115210275675132172
195240.607490.0540.0921.6317.621649568564226133
195357.738370.0690.0880.6618.091649072584734218
195462.328750.0710.1161.2219.1016710980654731186
195556.507260.0780.1531.6017.001779770574230175
195647.398820.0540.0770.9518.5517310273624936114
195733.926390.0530.0680.5717.59190835953362273
195861.639610.0640.0870.9718.2413410477645439228
195951.418570.0600.0931.0718.7716810078674835163
196044.466660.0670.1021.5416.931928663544231175
196147.847510.0640.0850.9516.511728966604531174
196243.237340.0590.0760.7517.922169364553724105
196334.846570.0530.0670.7214.86190866760402672
196436.476770.0540.0750.8218.452119158503624120
196523.715900.0400.0470.4217.38251905645301761
196636.016480.0560.0750.9016.082289463523726110
196747.518100.0590.0891.5616.581619479674826174
196842.266810.0620.0700.4815.952098563533930152
196947.897200.0670.0780.5019.171998465554027155
197041.917330.0570.0740.9516.451908972604228134
197135.677040.0510.0660.5415.47188877160402591
197253.099210.0580.0780.8516.0414611387735339154
197342.767480.0570.0820.9715.211529673615131112
197440.346520.0620.0910.8813.38168977362452693
197545.808580.0530.0630.5719.361809073584327135
197636.726470.0570.0890.9313.91173927360452392
197744.178220.0540.0630.4417.421759474654328162
197837.646680.0560.0751.0017.832018163493823114
197944.177790.0570.0841.0819.281809266584126155
198029.475120.0580.0790.7012.37241896852351890
198135.716790.0530.0650.8020.57223866555352182
198244.617160.0620.0830.9017.121908764553829133
198353.607790.0690.0790.6016.601659672614734185
198450.097440.0670.0860.6616.931789166564429154
198536.586960.0530.1062.0316.49174986458442582
198644.336820.0650.0810.6617.312149068573927134
198745.487490.0610.0790.7519.302028256513929135
198834.785880.0590.0820.7313.08221966755372193
198942.427810.0540.0730.7017.041329671664529131
199046.507110.0650.0990.9317.862019169574429146
199142.256800.0620.0850.7218.311978259543826145
199243.727330.0600.0920.9717.041789571594723104
199343.217540.0570.0760.6314.7918410070594333142
199447.608060.0590.0870.8418.631539771604329164
199535.126620.0530.0780.6616.931749570524024113
199649.437460.0660.0840.6515.591599577615130133
199730.256190.0490.0600.5816.09206956749352162
199853.206900.0770.1171.3417.161738362584228157
199937.835840.0650.1051.3114.88188856252412592
200044.526760.0660.0900.7216.511738669594635103
200129.645220.0570.0890.9814.09186816149322062
200239.927320.0550.0690.9117.841819271624433122
200340.787060.0580.0880.9615.6520310174644029130
200443.556460.0670.0960.7419.891848765513728124
200541.197140.0580.0700.5717.411839271634427102
200651.897630.0680.0830.5818.221729173644526136
200738.966530.0600.1021.6115.902109071563726113
200853.107560.0700.1010.9814.211379981735733155
200942.327340.0580.0740.7415.741599274684933122
201047.146720.0700.1121.5118.582158754473523135
201150.137650.0660.0840.8118.041599871665136202
201236.736260.0590.0991.3317.652239064523729111
201337.096430.0580.0800.7516.561689659534019112
201444.867490.0600.0760.8017.961559364625032124
201534.766570.0530.0730.5017.002169163523825122
201632.605980.0550.0690.6814.431899568553520120
201741.207650.0540.0790.6920.051959676613928132
201849.477740.0640.0981.1215.1914910582715341191
201946.927820.0600.1001.4113.1616010990764930151
202036.436350.0570.0851.2315.291989070574128110
202152.337470.0700.1051.0215.8316710074674836174
202231.016020.0520.0600.4713.70170977059392132
202348.207220.0670.1001.0615.401749875614735173
Mean41.10693.310.060.080.9016.30185.0491.168.357.941.726.811.92.8
          99.3% confidence in upward trend (τ = 0.159)

Longest drought = 36 days preceding 04/03/1915 12:00
Period of record = 130.00 years
Period missing = 0.00 years
Records = 90130
Mean event depth = 0.873 (≥.25 inches)
Annual event depth = 37.2 (≥.25 inches)
Mean event duration = 17.30 hours
Interevent coefficient of variation = 0.85 (excluding periods exceeding 40 dry days)
Interevent time = 12 hours
ARI: Average recurrence interval
AMS: Annual maximum series


RankDepthDateEvent IDHoursRecordsMaximumARI (y)
111.948/18/1955 6:00257140.00361.41183.54
28.865/12/2006 20:00474695.00770.4362.00
37.8910/20/1996 4:00435533.00330.6040.21
47.869/15/1933 24:00164542.00410.9039.64
57.0110/5/1962 8:00289461.00550.5925.67
66.983/13/2010 11:00493158.00580.4325.26
76.776/4/1982 17:00373283.00770.3622.46
86.776/12/1998 16:00442143.00321.3422.46
96.047/9/1921 2:00111822.00141.4514.44
106.033/31/2004 11:00465444.00410.5314.35
116.005/30/1984 17:00382576.00560.4314.07
125.9110/17/1932 16:00160766.00570.6113.27
135.745/15/1954 20:00251618.00180.9811.84
145.7312/11/1992 4:00418253.00410.4911.75
155.7210/12/1895 15:006939.00390.6411.67
165.649/10/1954 19:00253123.00181.2211.05
175.477/21/1938 6:00185280.00460.789.80
185.407/1/1915 3:0088350.00341.179.31
195.356/5/1986 13:00390662.00460.548.98
205.224/27/1904 3:0044872.00500.378.15
215.176/8/1931 15:00156070.00460.347.84
225.141/8/1956 16:002589161.001110.407.67
235.144/4/1987 9:00394382.00650.307.67
245.103/17/1968 15:00311140.00370.387.43
254.989/12/1944 19:00208855.00350.746.77
264.933/29/2010 3:00493353.00490.336.50
274.766/29/1921 19:00111769.00440.565.67
284.719/10/1999 8:00447317.00171.315.43
294.689/2/1905 23:0049938.00340.915.30
304.637/31/1985 14:00387214.00132.035.08
314.5912/26/1969 1:00318151.00390.414.91
324.488/22/2010 10:00494779.00531.094.47
334.378/25/1924 23:00124917.00170.784.06
344.3510/8/1998 13:00443782.00580.603.98
354.279/9/1924 22:00125315.00150.823.71
364.246/6/2000 8:00450627.00240.593.61
374.239/1/2021 11:00543220.00181.023.58
384.1610/13/2005 22:00472144.00360.343.36
394.156/18/1922 6:00115641.00270.333.33
404.1411/21/1992 15:004179100.00460.973.29
414.125/4/1922 7:00115238.00380.263.23
424.116/26/1938 10:00184864.00550.263.21
434.068/9/1917 5:0096630.00161.243.06
443.995/25/1967 5:00307541.00350.352.87
453.989/16/1958 18:00271541.00380.412.84
463.939/17/1938 18:00185880.00490.842.71
473.9110/13/1990 9:00408923.00180.932.66
483.8912/9/2008 21:00487062.00560.502.61
493.878/11/1989 6:00403862.00430.432.56
503.854/16/1954 12:00251042.00400.362.51
513.8111/9/1969 10:00317454.00390.352.42
523.802/23/1981 19:00368173.00590.182.40
533.7511/6/1963 5:00293884.00490.282.29
543.7312/3/1925 5:00131473.00600.202.24
553.725/21/1920 18:00107734.00340.322.22
563.7111/3/1955 18:00258355.00390.352.20
573.713/29/1953 9:00246551.00430.342.20
583.709/23/1975 2:00345280.00640.252.18
593.6710/1/1984 14:00383724.00240.662.12
603.669/25/1991 0:00412838.00290.402.10
613.669/15/1999 17:00447438.00300.702.10
623.653/29/2014 15:00510347.00380.352.08
633.636/7/2013 0:00506631.00260.752.04
643.602/24/1969 3:00314876.00640.251.99
653.598/5/1952 7:00243949.00251.631.97
663.587/19/1959 19:00276035.00191.071.95
673.579/14/1904 12:0046623.00130.851.93
683.565/27/1906 17:0052341.00400.581.91
693.545/8/1954 12:00251423.00230.421.88
703.497/28/1911 5:0072215.00150.951.79


RankTotalDateEvent IDGauge ARI (y)Atlas ARI (y)
12.038/1/1985 2:0038726629
21.638/5/1952 14:0024392211
31.617/30/2007 7:0047992110
41.607/10/1955 16:0025672010
51.589/1/1949 4:0023061910
61.568/6/1967 8:003085189
71.558/7/1908 15:00616179
81.546/4/1960 13:002800169
91.5310/9/1906 22:00536168
101.517/10/2010 15:004943158
111.457/9/1921 19:001118127
121.418/19/1955 9:002571106
131.416/29/2019 16:005335106
141.388/16/1938 23:00185496
151.347/18/1912 17:0076685
161.346/13/1998 14:00442185
171.337/18/2012 17:00502985
181.319/10/1999 23:00447375
191.319/2/1947 13:00221875
201.277/3/1916 17:0092364
211.248/10/1917 7:0096654
221.248/24/1901 24:0033554
231.238/23/2020 17:00538354
241.229/11/1954 12:00253154
251.228/22/1899 19:0025654
261.217/28/2007 16:00479854
271.177/1/1915 5:0088343
281.127/17/2018 17:00527833
291.098/25/2010 10:00494732
301.097/30/1946 20:00217732
311.0810/3/1979 17:00363332
321.078/21/1894 13:002532
331.077/19/1959 20:00276032
341.067/21/2023 22:00551232
351.067/31/2019 15:00534032
361.056/13/1959 18:00275122
371.058/31/1954 10:00252922
381.047/2/1955 19:00256622
391.039/12/1960 15:00280922
401.029/2/2021 3:00543222
411.008/12/1905 13:0049622
421.008/6/1978 9:00358122
430.9910/13/1927 12:00139922
440.985/16/1954 5:00251622
450.988/3/2001 20:00455422
460.987/20/2008 15:00484822
470.989/6/1979 13:00362922
480.9711/23/1992 3:00417922
490.976/29/1941 18:00196022
500.976/20/1945 6:00212822
510.977/29/1973 16:00335322
520.978/13/1958 4:00270922
530.9610/12/1948 1:00226722
540.969/23/2003 16:00463622
550.958/23/1970 15:00320622
560.9510/12/2003 15:00463722
570.959/25/1961 15:00285522
580.956/13/1956 18:00261222
590.957/28/1911 13:0072222
600.947/30/1926 6:00134422
610.948/10/1952 15:00244022
620.9310/14/1990 1:00408921
630.938/18/1895 10:006421
640.938/28/1976 1:00349721
650.926/11/1922 16:0011551.451
660.918/17/1898 18:002051.401
670.916/27/2002 18:0045871.401
680.917/31/1913 2:008081.401
690.919/4/1905 3:004991.401
700.914/1/1934 5:0016651.401
          20.2% confidence in downward trend (τ = -0.015)


RankTotalDateEvent IDGauge ARI (y)Atlas ARI (y)
12.858/1/1985 2:0038728937
22.518/19/1955 9:0025714620
32.357/9/1921 2:0011183215
42.287/1/1915 5:008832713
52.258/6/1967 7:0030852612
62.217/10/1955 15:0025672312
72.019/10/1999 22:004473148
81.988/10/1917 6:00966137
91.928/24/1901 24:00335117
101.927/21/2023 21:005512117
111.905/16/1954 4:002516116
121.897/28/2007 16:004798106
131.889/11/1954 12:002531106
141.839/1/1949 3:00230696
151.826/13/1998 14:00442185
161.828/21/1894 13:002585
171.808/5/1952 14:00243985
181.787/30/1926 5:00134485
191.788/25/2010 9:00494785
201.7310/9/1906 22:0053665
211.709/15/1904 7:0046664
221.709/2/2021 2:00543264
231.687/18/1912 17:0076664
241.678/16/1938 23:00185454
251.677/30/2007 6:00479954
261.678/7/1908 14:0061654
271.667/24/1926 8:00134354
281.657/10/2010 14:00494354
291.628/18/1994 5:00425754
301.629/12/1960 14:00280954
311.579/16/1933 8:00164543
321.556/4/1960 13:00280043
331.546/19/1942 23:00199943
341.538/3/2001 19:00455443
351.537/3/1916 17:0092343
361.518/4/1915 15:0088733
371.507/18/2012 17:00502933
381.507/28/1911 12:0072233
391.487/21/1938 17:00185233
401.489/2/1947 12:00221833
411.4712/6/1937 23:00181833
421.4410/13/1927 11:00139933
431.448/31/1954 9:00252933
441.4311/12/1947 12:00222332
451.4310/14/1990 1:00408932
461.436/29/2019 16:00533532
471.439/25/1961 14:00285532
481.418/26/1924 10:00124922
491.386/13/1959 18:00275122
501.388/22/1899 19:0025622
511.377/2/2021 1:00542022
521.356/12/1955 9:00256422
531.349/13/1918 5:00100222
541.3310/15/1930 7:00152722
551.335/28/2003 16:00462522
561.329/4/1905 2:0049922
571.328/25/1990 2:00408522
581.319/20/1899 8:0025822
591.3110/12/1948 1:00226722
601.316/2/1987 13:00395022
611.319/22/1998 14:00443622
621.307/12/2017 19:00523722
631.289/10/1924 4:00125322
641.287/17/2018 14:00527822
651.286/27/2002 18:00458722
661.2710/12/2003 15:00463722
671.268/23/2020 17:00538322
681.2611/23/1992 5:00417922
691.268/12/1905 12:0049622
701.259/16/1932 12:00160522
          34.9% confidence in downward trend (τ = -0.027)


RankTotalDateEvent IDGauge ARI (y)Atlas ARI (y)
13.618/19/1955 9:0025719656
23.588/1/1985 1:0038729353
33.026/13/1998 14:0044214322
42.927/1/1915 5:008833719
52.638/10/1917 6:009662312
62.587/9/1921 19:0011182111
72.508/6/1967 7:0030851810
82.499/11/1954 11:0025311810
92.499/10/1999 21:0044731810
102.405/16/1954 4:002516158
112.387/10/1955 15:002567148
122.229/16/1933 7:001645106
132.207/30/1926 5:001344106
142.187/24/1926 8:00134396
152.167/28/2007 15:00479896
162.168/25/2010 8:00494796
172.139/2/2021 2:00543285
182.039/1/1949 3:00230675
192.038/26/1924 10:00124975
202.038/21/1894 13:002575
212.019/15/1904 6:0046664
221.987/21/2023 20:00551264
231.9610/14/1990 1:00408964
241.958/18/1994 5:00425764
251.948/24/1901 24:0033554
261.939/12/1960 14:00280954
271.929/20/1899 8:0025854
281.899/10/1924 2:00125354
291.897/28/1911 12:0072254
301.8910/9/1906 22:0053654
311.8511/23/1992 3:00417943
321.858/4/1915 15:0088743
331.816/19/1942 23:00199943
341.818/5/1952 13:00243943
351.807/21/1938 16:00185243
361.7710/31/1895 24:007043
371.769/13/1918 5:00100233
381.757/17/2018 15:00527833
391.7512/6/1937 22:00181833
401.738/7/1908 14:0061633
411.727/30/2007 6:00479933
421.728/16/1938 23:00185433
431.728/31/1954 9:00252933
441.7010/15/1930 6:00152733
451.707/3/1916 16:0092333
461.697/18/1912 17:0076633
471.659/17/1995 15:00429632
481.657/10/2010 14:00494332
491.647/11/1959 5:00275832
501.636/4/1960 13:00280022
511.6110/20/1996 6:00435522
521.607/24/1988 5:00399322
531.609/16/1932 11:00160522
541.5911/12/1947 12:00222322
551.599/25/1961 14:00285522
561.5910/12/2003 14:00463722
571.589/2/1947 13:00221822
581.577/29/1973 14:00335322
591.567/18/2012 15:00502922
601.568/25/1990 1:00408522
611.568/3/2001 19:00455422
621.559/3/1919 19:00104322
631.529/14/1944 22:00208822
641.526/12/1955 8:00256422
651.5110/13/1927 11:00139922
661.507/29/1901 2:0033322
671.496/13/1959 18:00275122
681.497/2/2021 0:00542022
691.466/2/1982 7:00373122
701.469/4/1905 2:0049922
          16.6% confidence in downward trend (τ = -0.013)


RankTotalDateEvent IDGauge ARI (y)Atlas ARI (y)
15.468/19/1955 6:002571132135
24.189/11/1954 10:0025315132
34.157/31/1985 22:0038725031
44.035/16/1954 1:0025164526
53.716/13/1998 14:0044213218
63.629/10/1999 18:0044732916
73.539/16/1933 5:0016452715
83.377/1/1915 3:008832212
93.3310/14/1990 1:0040892111
103.248/26/1924 9:0012491910
113.159/1/2021 23:005432179
123.1011/23/1992 3:004179168
133.059/10/1924 2:001253158
142.938/10/1917 5:00966127
152.8410/20/1996 6:004355116
162.799/15/1904 3:00466106
172.767/28/1911 10:0072296
182.7012/6/1937 19:00181885
192.667/9/1921 19:00111885
202.617/17/2018 14:00527875
212.608/6/1967 6:00308574
222.578/25/2010 6:00494774
232.579/20/1899 6:0025874
242.527/1/2021 21:00542064
252.4910/31/1895 22:007064
262.399/17/1995 13:00429653
272.397/10/1955 15:00256753
282.379/14/1944 20:00208853
292.3710/13/1895 15:006953
302.348/5/1952 14:00243943
312.339/16/1932 9:00160543
322.319/12/1960 12:00280943
332.309/13/1918 3:00100243
342.307/30/1926 4:00134443
352.297/24/1926 6:00134343
362.257/11/1959 2:00275843
372.258/18/1994 3:00425743
382.259/2/1947 9:00221843
392.197/24/1988 3:00399333
402.179/3/1972 9:00330232
412.176/20/1945 2:00212832
422.167/28/2007 15:00479832
432.148/4/1915 12:0088732
442.119/1/1949 1:00230632
452.118/24/1990 22:00408532
462.107/18/1912 17:0076622
472.097/30/1976 8:00349222
482.098/21/1894 13:002522
492.098/11/1990 11:00408222
502.076/16/2017 16:00523422
512.078/24/1901 21:0033522
522.077/21/1938 13:00185222
532.078/31/1954 7:00252922
542.0610/9/1906 19:0053622
552.0512/17/2000 15:00453122
562.036/6/2000 13:00450622
572.0310/15/1930 5:00152722
582.0212/17/1973 7:00337122
592.0110/8/1998 21:00443722
602.0111/12/1947 11:00222322
612.008/16/1938 23:00185422
621.9812/11/1992 23:00418222
631.985/9/1954 3:00251422
641.987/21/2023 20:00551222
651.979/29/1907 7:0057422
661.963/31/1934 24:00166522
671.968/30/1975 3:00345022
681.964/1/2004 13:00465422
691.942/13/2008 13:00482422
701.949/16/1999 16:00447422
          10.9% confidence in downward trend (τ = -0.008)


RankTotalDateEvent IDGauge ARI (y)Atlas ARI (y)
16.748/19/1955 5:002571136132
25.545/15/1954 21:0025166845
35.449/11/1954 5:0025316341
45.019/16/1933 2:0016454726
54.816/13/1998 7:0044214021
64.7310/20/1996 5:0043553720
74.379/10/1999 13:0044732714
84.307/31/1985 16:0038722513
94.119/9/1924 22:0012532111
104.029/1/2021 18:0054321910
113.978/26/1924 3:001249189
123.857/1/1915 3:00883168
133.6310/13/1990 18:004089126
143.596/6/2000 12:004506116
153.489/14/1904 24:00466105
163.467/28/1911 6:00722105
173.4311/22/1992 22:00417995
183.387/9/1921 2:00111895
193.2410/13/1895 9:006974
203.2312/12/1992 2:00418274
213.164/1/2004 13:00465464
223.1310/5/1995 19:00429964
233.085/31/1984 7:00382554
243.016/9/1931 16:00156053
253.019/3/1972 5:00330253
263.0010/5/1962 20:00289453
272.978/10/1917 3:0096653
282.924/21/1991 4:00411343
292.923/31/1934 18:00166543
302.9112/6/1937 16:00181843
312.9110/15/1930 5:00152743
322.877/1/2021 20:00542043
332.869/16/1932 8:00160543
342.869/18/2004 3:00467643
352.8511/12/1947 5:00222343
362.8412/11/2008 21:00487043
372.829/20/1899 5:0025833
382.8210/31/1895 18:007033
392.819/12/1960 5:00280933
402.8010/2/1984 1:00383733
412.796/7/2013 15:00506633
422.783/29/1953 21:00246533
432.775/8/1954 21:00251433
442.779/16/1999 10:00447433
452.769/17/1995 7:00429632
462.758/25/2010 2:00494732
472.737/17/2018 14:00527832
482.728/11/1990 7:00408232
492.704/30/1921 21:00111332
502.695/14/2006 5:00474632
512.699/2/1947 8:00221832
522.6812/9/2014 8:00513832
532.6810/14/2005 23:00472132
542.669/29/1907 2:0057432
552.6310/22/2014 22:00512922
562.627/21/1938 16:00185222
572.6011/25/1983 1:00379722
582.608/6/1967 6:00308522
592.609/3/1905 16:0049922
602.589/23/1994 4:00426322
612.588/31/1954 1:00252922
622.566/4/1982 22:00373222
632.5411/4/1955 18:00258322
642.543/13/1984 20:00381422
652.5410/18/1932 11:00160722
662.526/15/1931 24:00156122
672.527/18/1912 16:0076622
682.519/18/1936 18:00176122
692.4812/17/1970 3:00322222
702.4811/25/1971 5:00326122
          69.1% confidence in upward trend (τ = 0.060)


RankTotalDateEvent IDGauge ARI (y)Atlas ARI (y)
18.358/18/1955 13:002571152134
26.6510/20/1996 5:0043556239
36.047/9/1921 2:0011184224
45.826/13/1998 8:0044213620
55.745/15/1954 20:0025163419
65.649/10/1954 19:0025313117
75.639/16/1933 1:0016453117
85.1412/11/1992 16:0041822112
94.9610/12/1895 22:00691810
104.735/13/2006 10:004746158
114.719/10/1999 8:004473148
124.637/31/1985 14:003872138
134.467/1/1915 3:00883117
144.378/25/1924 23:001249106
154.294/1/2004 1:00465496
164.279/9/1924 22:00125396
174.2610/5/1962 11:00289496
184.259/3/1905 5:0049996
194.239/1/2021 11:00543295
204.196/9/1931 8:00156085
214.186/6/2000 9:00450685
224.175/31/1984 2:00382585
234.1712/26/1969 6:00318185
244.133/17/1968 22:00311185
254.036/5/1986 21:00390675
263.9110/13/1990 9:00408964
273.7611/22/1992 12:00417954
283.696/18/1922 22:00115653
293.6910/14/2005 18:00472153
303.6710/1/1984 14:00383753
313.6510/18/1932 12:00160743
323.645/25/1967 10:00307543
333.623/29/2010 15:00493343
343.608/9/1917 9:0096643
353.586/7/2013 7:00506643
363.579/14/1904 12:0046643
373.545/8/1954 12:00251443
383.533/13/2010 22:00493143
393.497/28/1911 5:0072243
403.408/24/2010 12:00494733
413.3410/15/1930 5:00152732
423.3212/11/2008 10:00487032
433.3211/11/1947 19:00222332
443.324/21/1991 1:00411332
453.315/21/1920 20:00107732
463.3111/4/1955 7:00258332
473.3110/5/1995 14:00429932
483.319/18/1936 10:00176132
493.309/15/1999 22:00447432
503.255/4/1922 12:00115232
513.236/4/1982 21:00373222
523.206/29/1921 20:00111722
533.1710/30/1939 21:00190222
543.174/30/1921 9:00111322
553.159/3/1972 4:00330222
563.144/27/1904 19:0044822
573.128/5/1952 14:00243922
583.1111/24/1983 18:00379722
593.118/1/1946 13:00217822
603.109/16/1932 5:00160522
613.103/29/1953 20:00246522
623.097/21/1938 7:00185222
633.095/9/1977 9:00352922
643.099/28/1907 21:0057422
653.099/11/1960 18:00280922
663.0812/6/1945 9:00214922
673.089/25/1961 4:00285522
683.043/31/1934 18:00166522
693.031/9/1935 18:00169422
702.994/4/1987 21:00394322
          70.4% confidence in upward trend (τ = 0.062)


RankTotalDateEvent IDGauge ARI (y)Atlas ARI (y)
111.948/18/1955 6:002571211278
27.8910/20/1996 4:0043554936
37.869/15/1933 24:0016454835
47.795/12/2006 23:0047464734
56.776/12/1998 16:0044212818
66.7410/5/1962 14:0028942717
76.333/13/2010 14:0049312113
86.047/9/1921 2:0011181811
96.033/31/2004 11:0046541811
105.986/4/1982 21:0037321710
115.745/15/1954 20:002516159
125.7210/12/1895 15:0069149
135.7212/11/1992 14:004182149
145.699/10/1954 2:002531149
155.6610/18/1932 8:001607149
165.357/1/1915 3:00883117
175.103/17/1968 15:00311196
185.006/5/1986 13:00390685
194.966/9/1931 2:00156085
204.944/27/1904 11:0044885
214.903/29/2010 3:00493385
224.719/10/1999 8:00447364
234.695/31/1984 2:00382564
244.689/2/1905 23:0049964
254.689/13/1944 1:00208864
264.637/31/1985 14:00387264
274.5412/26/1969 1:00318164
284.378/25/1924 23:00124954
294.354/5/1987 0:00394354
304.289/9/1924 5:00125343
314.246/6/2000 8:00450643
324.239/1/2021 11:00543243
334.227/1/2021 21:00542043
344.1610/13/2005 22:00472143
354.156/18/1922 6:00115643
364.125/4/1922 7:00115243
374.068/9/1917 5:0096633
384.047/21/1938 13:00185233
393.995/25/1967 5:00307533
403.989/16/1958 18:00271533
413.976/29/1921 19:00111733
423.948/19/1991 7:00412433
433.9110/13/1990 9:00408933
443.9011/22/1992 12:00417933
453.887/28/2007 15:00479832
463.854/16/1954 12:00251032
473.7711/9/1969 10:00317432
483.7412/10/2008 9:00487022
493.725/21/1920 18:00107722
503.698/23/2010 13:00494722
513.6811/4/1955 7:00258322
523.683/29/1953 9:00246522
533.6710/1/1984 14:00383722
543.669/25/1991 0:00412822
553.669/15/1999 17:00447422
563.6610/15/1955 3:00258022
573.653/29/2014 15:00510322
583.652/24/1981 9:00368122
593.636/7/2013 0:00506622
603.587/19/1959 19:00276022
613.579/14/1904 12:0046622
623.578/5/1952 8:00243922
633.565/27/1906 17:0052322
643.5510/8/1998 14:00443722
653.545/8/1954 12:00251422
663.5012/10/1936 10:00177022
673.496/26/1938 10:00184822
683.497/28/1911 5:0072222
693.4512/6/1945 8:00214922
703.438/11/1989 16:00403822
          62.8% confidence in upward trend (τ = 0.053)


RankTotalDateEvent IDGauge ARI (y)Atlas ARI (y)
112.478/17/1955 13:002570211238
28.345/12/2006 20:0047465032
37.9910/20/1996 4:0043554325
47.889/14/1933 20:0016454024
57.686/13/1998 2:0044213721
67.0110/5/1962 8:0028942615
76.983/13/2010 11:0049312514
86.536/4/1982 21:0037322011
96.047/9/1921 2:001118148
106.033/31/2004 11:004654148
115.995/30/1984 22:003825148
125.9110/17/1932 16:001607137
135.829/9/1954 3:002531127
145.745/15/1954 20:002516127
155.7312/11/1992 4:004182127
165.7210/12/1895 15:0069117
175.437/1/1915 3:0088395
185.356/5/1986 13:00390695
195.277/21/1938 13:00185285
205.224/27/1904 3:0044885
215.176/8/1931 15:00156085
225.113/17/1968 15:00311174
235.024/4/1987 9:00394374
244.999/8/1999 7:00447264
254.989/12/1944 19:00208864
264.933/29/2010 3:00493364
274.9311/22/1953 23:00249064
284.927/1/2021 12:00542064
294.816/18/1922 22:00115664
304.766/29/1921 19:00111754
314.689/2/1905 23:0049953
324.637/31/1985 14:00387253
334.5912/26/1969 1:00318153
344.527/30/1946 20:00217743
354.438/22/2010 13:00494743
364.378/25/1924 23:00124943
374.363/13/1953 6:00246043
384.318/19/1991 1:00412433
394.289/9/1924 5:00125333
404.258/30/2021 23:00543233
414.2410/8/1998 13:00443733
424.246/6/2000 8:00450633
434.1610/13/2005 22:00472132
444.125/4/1922 7:00115232
454.116/26/1938 10:00184832
464.0611/22/1992 12:00417932
474.068/9/1917 5:0096632
484.047/28/2007 2:00479832
493.995/25/1967 5:00307532
503.9810/14/1955 19:00258022
513.989/16/1958 18:00271522
523.968/6/1976 19:00349422
533.9110/13/1990 9:00408922
543.8912/9/2008 21:00487022
553.878/11/1989 6:00403822
563.854/16/1954 12:00251022
573.8512/10/1936 6:00177022
583.825/8/1954 12:00251422
593.829/17/1938 18:00185822
603.819/23/1991 14:00412822
613.8111/9/1969 10:00317422
623.792/24/1981 0:00368122
633.789/15/1900 24:0029822
643.725/21/1920 18:00107722
653.7211/6/1963 5:00293822
663.7111/3/1955 18:00258322
673.713/29/1953 9:00246522
683.6812/3/1925 5:00131422
693.6710/1/1984 14:00383722
703.673/28/2014 16:00510322
          51.3% confidence in upward trend (τ = 0.041)


RankTotalDateEvent IDGauge ARI (y)Atlas ARI (y)
112.478/17/1955 13:002570192198
28.865/12/2006 20:0047465934
38.0710/20/1996 4:0043554221
48.066/12/1998 16:0044214221
57.969/14/1933 5:0016454020
67.0110/5/1962 8:0028942512
76.983/13/2010 11:0049312411
86.776/4/1982 17:0037322110
96.265/29/1984 21:003824167
106.063/31/2004 13:004654147
116.047/9/1921 2:001118137
125.9110/17/1932 16:001607126
135.909/7/1954 18:002530126
145.867/20/1938 8:001851126
155.7910/12/1895 15:0069116
165.755/12/1954 18:002516115
175.7312/11/1992 4:004182115
185.447/1/1915 3:0088395
195.394/27/1904 3:0044884
205.366/5/1986 13:00390684
215.319/7/1999 3:00447184
225.306/7/2013 7:00506684
235.246/7/1931 12:00156074
245.206/18/1922 6:00115674
255.173/17/1968 16:00311174
265.144/4/1987 9:00394374
275.086/30/2021 18:00542064
284.989/12/1944 19:00208863
294.933/29/2010 3:00493363
304.9311/22/1953 23:00249063
314.816/29/1921 1:00111753
324.699/2/1905 23:0049943
334.6312/24/1969 6:00318143
344.637/31/1985 14:00387243
354.633/12/1953 22:00246043
364.527/30/1946 20:00217742
374.488/22/2010 10:00494742
384.4611/7/1969 19:00317342
394.378/25/1924 23:00124932
404.3510/8/1998 13:00443732
414.3510/11/2005 16:00472132
424.329/12/1904 1:0046532
434.318/19/1991 1:00412432
444.308/6/1976 19:00349432
454.289/9/1924 5:00125332
464.2511/22/1992 13:00417932
474.258/30/2021 23:00543232
484.246/6/2000 8:00450632
494.243/8/1983 18:00376532
504.2212/5/2014 23:00513732
514.125/4/1922 7:00115222
524.116/26/1938 10:00184822
534.068/9/1917 5:0096622
544.047/28/2007 2:00479822
554.029/17/1938 18:00185822
564.0010/14/1955 2:00258022
574.001/8/1956 18:00258922
583.995/25/1967 5:00307522
593.989/16/1958 18:00271522
603.9310/10/1990 19:00408922
613.9311/8/1947 19:00222222
623.929/23/1975 6:00345222
633.918/11/1989 6:00403822
643.8912/9/2008 21:00487022
653.8912/10/1936 5:00177022
663.8711/7/1932 1:00161022
673.863/29/1953 9:00246522
683.854/16/1954 12:00251022
693.849/6/1896 22:0010821
703.8312/1/1925 11:00131321
          64.9% confidence in upward trend (τ = 0.055)


RankTotalDateEvent IDGauge ARI (y)Atlas ARI (y)
113.528/17/1955 13:002570173201
210.375/9/2006 13:0047456549
38.966/2/1982 2:0037313722
48.456/12/1998 16:0044212917
58.379/10/1999 8:0044732816
68.0710/20/1996 4:0043552413
77.969/14/1933 9:0016452313
87.955/15/1954 20:0025162213
97.753/31/1987 3:0039422011
107.677/18/1938 9:0018511911
117.645/26/1984 20:0038231910
127.526/7/2013 9:0050661810
137.156/9/1931 8:001560148
147.079/10/1954 19:002531148
157.0610/5/1962 8:002894138
167.063/11/2010 11:004931138
176.743/12/1968 18:003110116
186.4012/11/1992 4:00418295
196.307/9/1921 2:00111885
206.293/31/2004 11:00465485
216.1010/8/2005 15:00472074
226.096/5/1986 14:00390674
236.0310/8/1895 12:006874
245.976/1/2006 20:00474964
255.9412/22/1969 6:00318064
265.9110/17/1932 16:00160764
275.909/20/1961 23:00285464
285.667/26/1985 10:00387153
295.639/13/1987 10:00395953
305.627/1/1915 3:0088353
315.477/1/2021 12:00542043
325.4711/4/1969 12:00317243
335.468/5/1952 7:00243943
345.444/25/1904 4:0044843
355.2410/8/1998 13:00443732
365.245/4/1998 22:00441532
375.239/19/1991 13:00412732
385.206/18/1922 6:00115632
395.198/29/1905 4:0049832
405.141/8/1956 16:00258932
415.126/15/1903 9:0040932
425.1210/13/1990 9:00408932
435.111/20/1979 21:00360232
445.113/24/1953 15:00246332
455.103/26/2010 4:00493332
465.0911/7/1968 12:00313332
475.049/22/1907 24:0057332
484.989/12/1944 19:00208832
494.9711/22/1953 23:00249032
504.943/12/1953 22:00246032
514.946/26/1921 9:00111732
524.937/15/1959 1:00275932
534.926/6/2000 8:00450632
544.888/17/1994 22:00425722
554.877/24/1926 6:00134322
564.847/21/1988 22:00399222
574.779/5/1924 21:00125222
584.758/25/1924 23:00124922
594.728/1/1946 11:00217822
604.7112/2/2014 22:00513622
614.7111/1/1951 6:00239522
624.6812/10/1936 7:00177022
634.602/19/1981 21:00368022
644.604/12/1933 8:00162922
654.604/16/1929 9:00147322
664.5711/21/1992 15:00417922
674.553/7/1983 3:00376521
684.515/3/1954 18:00251321
694.519/8/1904 20:0046521
704.4911/20/1950 20:00235021
          79.4% confidence in upward trend (τ = 0.075)


RankTotalDateEvent IDGauge ARI (y)Atlas ARI (y)
114.258/17/1955 13:002570146196
210.805/9/2006 13:0047455040
310.576/29/1921 22:0011174635
49.805/29/1982 5:0037303423
59.585/7/1954 2:0025143120
69.539/27/1962 10:0028933020
78.959/7/1999 3:0044712314
88.943/13/2010 12:0049312314
98.486/8/1998 18:0044211811
108.466/7/1931 12:0015601811
118.2810/20/1996 4:0043551610
128.039/9/1933 2:001645149
137.903/31/1987 3:003942138
147.816/30/2021 18:005420138
157.787/18/1938 9:001851137
167.765/23/1984 19:003823127
177.739/7/1954 11:002530127
187.706/7/2013 0:005066127
197.497/1/1915 3:00883116
207.0611/3/1969 2:00317185
216.973/10/1968 18:00311085
226.9110/17/1932 24:00160775
236.6412/3/1992 2:00418164
246.626/5/1986 13:00390664
256.587/11/1959 5:00275864
266.483/26/2004 23:00465454
276.466/1/2006 20:00474953
286.4610/7/2005 23:00472053
296.2212/22/1969 6:00318043
306.216/11/1922 16:00115543
316.143/2/1983 4:00376443
326.1010/8/1895 12:006843
336.098/23/2021 17:00543143
346.028/13/1994 7:00425643
355.987/30/1946 20:00217743
365.965/2/1998 0:00441443
375.9212/10/1936 11:00177032
385.909/20/1961 23:00285432
395.867/17/1988 21:00399032
405.856/12/1903 11:0040832
415.808/1/1952 4:00243832
425.779/13/1987 10:00395932
435.767/22/1985 4:00387032
445.701/8/1956 16:00258932
455.704/19/1904 21:0044732
465.674/12/1929 11:00147232
475.649/11/1960 13:00280932
485.589/1/1924 10:00125032
495.5411/29/1945 2:00214832
505.5211/21/1971 7:00326032
515.5111/28/1937 5:00181722
525.453/23/2010 12:00493222
535.4511/15/1983 22:00379522
545.446/2/2000 18:00450522
555.429/12/1918 19:00100222
565.423/21/2001 20:00454022
575.371/17/1979 16:00360222
585.377/24/1926 6:00134322
595.309/12/1938 21:00185622
605.308/9/1917 5:0096622
615.283/24/1953 15:00246322
625.2610/13/1990 20:00408922
635.269/19/1991 13:00412722
645.268/25/1905 5:0049822
655.253/28/2017 16:00522322
665.2410/8/1998 13:00443722
675.2012/17/1970 0:00322221
685.2011/7/1968 12:00313321
695.198/6/1976 19:00349421
705.1112/1/2014 17:00513621
          86.8% confidence in upward trend (τ = 0.089)


RankTotalDateEvent IDGauge ARI (y)Atlas ARI (y)
116.818/11/1955 17:002569133193
214.483/11/2010 11:0049316972
312.865/3/1954 9:0025134032
412.215/1/2006 22:0047443223
512.046/2/1982 2:0037313021
611.488/28/1933 17:0016422416
711.246/26/1921 9:0011172115
810.926/12/1998 16:0044211912
910.869/17/1962 20:0028921812
1010.598/31/1954 0:0025291610
1110.5811/23/1992 2:0041791610
1210.5010/8/1996 17:0043541510
1310.093/12/1953 22:002460138
1410.056/22/2021 15:005419128
159.958/25/1924 23:001249128
169.855/29/2013 22:005064117
179.4012/8/1969 4:00317796
189.369/6/1999 12:00447195
199.153/31/1987 3:00394285
209.117/10/1938 2:00185085
219.001/6/1979 4:00360075
228.9510/7/2005 23:00472074
238.906/7/1931 12:00156074
248.899/8/1918 16:00100174
258.863/26/2004 23:00465474
268.809/15/1961 1:00285364
278.7310/18/1932 10:00160764
288.713/1/1983 20:00376464
298.6210/12/1895 15:006964
308.297/30/1946 20:00217753
318.245/13/1984 22:00382353
328.1211/3/1969 1:00317143
338.127/2/1959 0:00275643
348.0911/23/1953 3:00249043
358.098/19/2021 8:00542943
368.0710/27/2018 11:00529443
378.067/21/1976 12:00349043
387.962/29/1968 18:00310943
397.901/7/1958 15:00267642
407.841/7/1978 8:00355942
417.795/31/1986 23:00390532
427.767/1/1915 3:0088332
437.7512/2/1936 17:00176832
447.6911/10/1983 21:00379432
457.653/13/1993 11:00419332
467.629/16/1958 18:00271532
477.536/11/1922 12:00115532
487.477/10/2023 8:00551032
497.3911/18/1945 5:00214632
507.387/10/1988 3:00398832
517.373/31/1933 22:00162632
527.284/23/1998 14:00441322
537.224/9/1929 1:00147122
547.217/22/2008 21:00484922
557.204/9/1904 19:0044422
567.117/24/1926 8:00134321
577.056/7/2006 1:00475021
587.022/17/1998 23:00440321
597.028/3/1994 10:00425521
606.996/8/1903 6:0040721
616.9910/4/1990 19:00408821
626.992/12/1900 6:0027621
636.999/1/1987 2:00395721
646.9611/24/2014 7:00513421
656.9310/23/1953 9:00248721
666.909/17/1995 7:00429621
676.885/30/1959 18:00274921
686.818/2/1952 18:00243821
696.7711/25/2008 2:00486821
706.768/25/1922 15:00116621
          95.8% confidence in upward trend (τ = 0.121)


RankTotalDateEvent IDGauge ARI (y)Atlas ARI (y)
117.195/9/2006 13:0047459092
217.168/7/1955 4:0025689091
315.363/11/2010 11:0049315141
415.254/16/1954 12:0025104939
513.655/23/1982 2:0037292719
613.396/26/1938 10:0018482416
712.936/29/1921 24:0011172013
812.868/20/1933 1:0016402013
912.193/15/1953 11:002461159
1012.0511/21/1992 15:004179149
1111.945/31/1998 23:004419138
1211.9110/11/1932 15:001607138
1311.575/19/2013 18:005062117
1411.559/22/1996 16:004351117
1511.438/12/1924 10:001248106
1611.353/31/1987 3:003942106
1711.238/4/2021 19:00542796
1811.109/14/1962 18:00289296
1911.047/30/1946 20:00217785
2010.908/31/1954 0:00252985
2110.893/31/2004 11:00465485
2210.621/8/1978 21:00355974
2310.606/14/2021 9:00541874
2410.545/3/1984 19:00382164
2510.519/6/1999 12:00447164
2610.501/1/1979 15:00359964
2710.3910/27/1953 22:00248864
2810.282/11/1983 23:00376264
2910.0510/6/1955 12:00257953
309.9711/15/1983 22:00379553
319.946/7/1931 12:00156053
329.906/22/1959 9:00275453
339.8611/2/2018 23:00529643
349.8612/8/1969 3:00317743
359.6712/29/1957 5:00267443
369.592/15/1984 0:00380942
379.5910/8/2005 1:00472042
389.5610/8/1895 12:006842
399.537/29/1976 16:00349242
409.403/14/1958 8:00268332
419.288/29/1918 12:00100032
429.2511/10/1945 21:00214432
439.257/2/2023 11:00550832
449.235/21/1920 18:00107732
459.187/18/2008 21:00484832
469.183/31/1904 20:0044232
479.093/5/1993 0:00419132
489.083/20/1933 10:00162432
499.046/5/1986 13:00390632
509.047/18/1926 18:00134232
519.009/15/1961 2:00285332
528.986/9/1922 16:00115532
538.9611/24/1936 4:00176732
548.8911/13/2014 23:00513232
558.8611/8/1972 10:00331122
568.8111/7/1968 12:00313322
578.773/9/1901 8:0031122
588.742/4/1900 23:0027421
598.727/1/1915 3:0088321
608.677/16/1989 23:00403221
618.588/13/1919 24:00103821
628.589/7/1987 6:00395821
638.531/8/1956 16:00258921
648.444/17/1998 12:00441121
658.3912/3/1901 3:0034321
668.399/7/1958 17:00271421
678.3011/15/1981 6:00370521
688.2811/19/1986 6:00392421
698.263/22/1903 13:0040121
708.264/20/1901 16:0031921
          97.9% confidence in upward trend (τ = 0.136)


RankTotalDateEvent IDGauge ARI (y)Atlas ARI (y)
119.645/12/2006 20:0047468686
218.838/11/1955 17:0025696661
318.222/24/2010 1:0049295446
418.164/16/1954 12:0025105345
516.043/12/1953 22:0024602418
615.425/4/1998 1:0044151914
715.399/7/1996 19:0043491914
815.045/20/1982 15:0037291612
914.966/11/1938 10:0018461612
1014.886/6/1959 14:0027501511
1114.495/28/2021 19:0054151310
1214.379/27/1962 3:002893129
1314.346/26/1921 9:001117129
1414.2110/23/1953 9:002487118
1514.088/4/1933 3:001638118
1613.729/6/1999 12:00447197
1713.532/6/1983 20:00376186
1813.5311/3/1992 4:00417686
1913.428/3/1954 9:00252786
2013.2410/13/1895 1:006975
2113.147/31/1924 16:00124575
2213.105/8/1931 17:00155475
2313.002/15/1984 0:00380965
2413.0012/9/1957 4:00267065
2512.967/27/2021 19:00542665
2612.927/16/2023 5:00551165
2712.787/1/1915 3:0088364
2812.753/22/1987 0:00394164
2912.695/8/2013 23:00506154
3012.5311/3/1983 16:00379354
3112.509/28/1932 4:00160654
3212.483/7/1933 16:00162254
3312.383/20/2004 20:00465354
3412.2911/19/1986 2:00392443
3512.2110/21/2018 8:00529343
3612.153/20/1901 20:0031343
3712.1510/6/1955 12:00257943
3812.124/23/1984 20:00382043
3912.1010/8/2005 16:00472043
4012.0412/17/1978 6:00359743
4111.852/12/1993 19:00418843
4211.847/21/1976 12:00349043
4311.748/21/1961 3:00285033
4411.737/21/1946 5:00217633
4511.6612/12/1977 19:00355532
4611.5011/3/1969 1:00317132
4711.5010/23/1945 22:00214232
4811.482/28/1958 1:00268232
4911.3511/8/1972 10:00331132
5011.359/16/1958 18:00271532
5111.182/4/1900 21:0027432
5211.111/30/2008 12:00482122
5311.0110/4/1995 10:00429922
5410.8911/18/1994 17:00426422
5510.898/15/1991 12:00412422
5610.864/21/1920 18:00107122
5710.8011/14/1981 23:00370522
5810.777/19/1927 5:00138321
5910.774/15/1967 6:00306521
6010.7412/4/1993 20:00422421
6110.6811/24/1901 10:0034221
6210.6110/28/1963 17:00293621
6310.598/28/1987 9:00395621
6410.585/31/1986 23:00390521
6510.576/27/2008 14:00484521
6610.564/7/1904 9:0044321
6710.5311/24/1936 4:00176721
6810.483/6/1903 13:0039921
6910.468/13/1994 7:00425621
7010.4010/29/2014 20:00513021
          96.4% confidence in upward trend (τ = 0.125)


RankTotalDateEvent IDGauge ARI (y)Atlas ARI (y)
123.348/18/1955 6:002571111170
222.595/1/2006 22:00474489120
319.674/16/1954 12:0025103537
419.112/16/2010 9:0049282929
518.843/4/1953 1:0024592626
618.185/2/1998 0:0044142020
717.9211/3/1969 1:0031711818
817.925/29/1982 13:0037301818
917.216/30/2021 18:0054201414
1017.0010/23/1953 9:0024871312
1116.985/26/1938 15:0018441312
1216.975/23/1959 21:0027491312
1316.9311/30/1957 13:0026691312
1416.658/23/1996 20:0043461111
1516.583/1/1983 18:0037641110
1615.966/27/2023 2:00550688
1715.912/20/1933 7:00161988
1815.919/25/1962 23:00289388
1915.869/16/1932 5:00160588
2015.816/26/1921 9:00111787
2115.643/21/1901 11:0031377
2215.337/20/1933 22:00163766
2315.251/30/1984 22:00380666
2415.183/14/1958 8:00268366
2515.022/12/1993 13:00418865
2615.0010/8/1895 12:006865
2714.997/21/1954 4:00252465
2814.984/4/1984 23:00381855
2914.959/6/1999 12:00447155
3014.9211/27/1978 17:00359355
3114.924/26/1931 6:00155355
3214.7011/6/1986 1:00392155
3314.6110/23/1983 20:00379254
3414.615/29/2013 4:00506354
3514.5911/17/1992 15:00417954
3614.5311/28/1977 3:00355244
3714.524/21/1920 6:00107144
3814.499/17/1995 7:00429644
3914.426/26/1915 8:0088344
4014.2811/4/1945 5:00214344
4114.2611/15/1981 3:00370544
4214.2210/11/2014 8:00512744
4313.963/31/2004 11:00465433
4413.917/25/1924 15:00124533
4513.837/15/1919 23:00103333
4613.758/4/1958 16:00270633
4713.733/1/1987 3:00394033
4813.4311/2/1972 10:00331032
4913.439/18/2018 2:00528732
5013.385/4/1922 7:00115232
5113.2310/7/2005 23:00472032
5213.238/19/1991 6:00412432
5313.1511/2/1968 4:00313322
5413.101/11/2008 5:00481822
5513.078/7/2011 2:00499022
5612.851/20/1900 9:0027122
5712.794/11/1972 10:00328222
5812.706/15/2008 8:00484122
5912.669/23/1975 2:00345222
6012.617/13/1927 17:00138222
6112.579/1/2021 11:00543222
6212.509/14/1989 20:00404122
6312.504/21/1928 24:00142322
6412.474/3/1990 11:00406521
6512.413/28/1967 7:00306321
6612.4011/24/1936 5:00176721
6712.397/21/1976 12:00349021
6812.387/27/1994 2:00425421
6912.384/1/1904 11:0044221
7012.384/18/2000 19:00449721
          98.8% confidence in upward trend (τ = 0.148)

Frequency Estimates
DurationAverage Recurrence IntervalGEVConstraint
adjustment
1-mo3-mo6-mo1-y2-y5-y10-y25-y50-y100-y200-y500-y1000-yξακ
Event1.001.742.272.733.614.615.506.968.3610.112.215.919.43.3520.6587-0.3110 1.
1-hour0.2700.4500.5900.7941.001.221.401.671.922.212.553.083.570.94410.1535-0.2324 1.08
2-hour0.4100.6500.8401.041.341.641.882.242.552.913.323.964.521.2580.2198-0.1989 1.04
3-hour0.5000.8001.011.211.541.902.212.683.123.644.265.266.201.4480.2493-0.2568 1.02
6-hour0.6901.111.371.682.012.422.803.474.155.046.188.2310.31.9100.2509-0.3794 1.01
12-hour0.8601.411.772.162.553.033.494.295.116.177.5510.012.62.4300.2948-0.3853 1.00
1-day0.9701.632.082.483.073.754.365.356.317.508.9711.513.92.9010.4439-0.3155 1.00
2-day1.041.792.302.803.544.425.236.597.939.6211.815.519.23.3190.5637-0.3420 1.00
3-day1.111.912.492.993.774.705.546.958.3410.112.316.119.83.5390.5942-0.3368 1.00
4-day1.162.072.673.243.944.825.637.048.4610.312.616.821.13.7320.5413-0.3695 1.00
7-day1.272.413.133.844.685.696.608.169.6911.614.118.422.64.4300.6395-0.3446 1.00
10-day1.312.793.574.305.256.387.409.1210.812.915.520.124.64.9710.7253-0.3338 1.00
20-day1.313.684.825.686.978.409.6411.613.515.718.523.027.46.5970.9644-0.2842 1.00
30-day1.314.255.827.018.5010.111.413.515.317.520.124.428.38.0801.101-0.2480 1.00
45-day1.314.567.158.8710.712.513.916.118.020.122.626.429.810.191.325-0.1980 1.00
60-day1.314.568.3610.512.714.816.418.720.723.025.529.332.612.121.554-0.1705 1.00
90% confidence intervals
Duration1-y2-y5-y10-y25-y50-y100-y200-y500-y1000-y
1-hour0.77-0.810.97-1.041.16-1.281.31-1.491.50-1.861.66-2.251.82-2.751.98-3.372.23-4.452.41-5.59
2-hour1.00-1.061.30-1.391.57-1.721.76-2.012.02-2.472.22-2.932.43-3.512.64-4.202.94-5.413.18-6.58
3-hour1.16-1.241.49-1.601.81-2.012.05-2.392.39-3.042.66-3.702.94-4.553.24-5.653.68-7.604.02-9.65
6-hour1.64-1.711.96-2.072.31-2.542.60-3.023.04-3.973.42-5.023.85-6.594.34-8.805.14-13.305.80-18.33
12-hour2.11-2.192.48-2.622.90-3.193.25-3.773.77-4.914.22-6.214.77-8.015.37-10.666.23-16.067.03-22.19
1-day2.41-2.532.99-3.173.58-3.944.04-4.704.72-6.085.28-7.595.88-9.696.57-12.537.59-17.908.51-23.69
2-day2.70-2.863.43-3.674.20-4.684.81-5.725.72-7.756.47-9.887.29-12.888.22-17.059.61-25.5910.83-35.15
3-day2.88-3.053.65-3.914.46-4.985.11-6.016.03-8.006.82-10.177.75-13.098.76-17.0210.21-24.4911.51-32.74
4-day3.14-3.303.84-4.074.59-5.085.20-6.106.09-8.056.88-10.377.78-13.638.75-18.1910.26-27.4311.62-37.82
7-day3.72-3.904.55-4.835.43-5.996.12-7.167.17-9.378.09-11.739.05-15.2010.18-19.8711.76-29.0513.17-38.96
10-day4.17-4.375.12-5.426.09-6.756.89-8.038.02-10.518.99-13.2110.10-16.8611.26-22.0813.03-32.0414.55-42.97
20-day5.51-5.776.78-7.178.03-8.828.99-10.3610.41-13.1211.51-15.9512.66-19.7013.93-24.7615.76-33.6117.36-43.00
30-day6.80-7.138.28-8.739.69-10.5110.76-12.1912.22-15.0213.39-17.9214.59-21.6815.89-26.7417.74-35.1319.30-43.78
45-day8.62-9.0310.42-10.9712.05-13.0313.25-14.7714.90-17.6816.14-20.5617.39-23.8518.77-28.1620.53-35.6222.01-43.05
60-day10.25-10.7312.40-13.0114.27-15.2915.58-17.2217.33-20.3818.59-23.2019.96-26.7121.30-30.8523.03-37.6324.45-43.84

GEV distribution fitted using L-moments for ≥1 year
Empirical results for periods <1 year
NOAA Atlas 14 frequency estimates
Input file: C:\Users\heinemanmc\OneDrive - CDM Smith\MetData\2024merged\KBOS.dat
Analysis completed: 1/7/2024 22:14
Elapsed time : 325.5 seconds
Developed by Mitch Heineman, Ajay Prasad, and Masoud Soltani. CDM Smith, 1991-2024