NetSTORM Point Precipitation Frequency Estimates

Annual Statistics | Event Listings | Frequency Estimates

Gage ID: KBOS
Location: BOSTON, MA
Latitude: 42.3606°, Longitude: -71.0097°
Elevation: 12.1 ft
Additional metadata

Monthly Statistics
Month	Total	Records	Mean	Standard Deviation	Maximum	Duration
Jan	3.42	74.13	0.046	0.054	0.650	17.61
Feb	3.24	68.02	0.048	0.054	0.660	18.20
March	3.74	75.10	0.050	0.057	0.680	18.13
April	3.67	68.07	0.054	0.062	0.910	17.87
May	3.21	57.43	0.056	0.072	0.980	17.78
June	3.31	46.89	0.071	0.108	1.540	15.25
July	3.18	37.11	0.086	0.140	1.610	11.63
Aug	3.34	39.63	0.084	0.141	2.030	11.32
Sep	3.28	41.79	0.078	0.118	1.580	14.69
Oct	3.33	50.80	0.066	0.089	1.530	16.46
Nov	3.70	63.56	0.058	0.074	0.970	18.25
Dec	3.71	71.24	0.052	0.061	0.810	17.24

Hour of Day Statistics
Hour	Jan	Feb	March	April	May	June	July	Aug	Sep	Oct	Nov	Dec	Total	Records	Mean	Standard Deviation	Maximum
1:00	0.15	0.15	0.16	0.17	0.17	0.12	0.09	0.13	0.12	0.17	0.16	0.17	1.76	28.96	0.061	0.083	0.96
2:00	0.14	0.14	0.18	0.15	0.15	0.12	0.14	0.13	0.13	0.17	0.17	0.16	1.76	29.53	0.060	0.084	2.03
3:00	0.15	0.14	0.18	0.17	0.14	0.14	0.13	0.13	0.16	0.18	0.17	0.16	1.85	30.70	0.060	0.084	1.35
4:00	0.14	0.13	0.16	0.18	0.15	0.13	0.13	0.11	0.18	0.17	0.17	0.16	1.82	30.84	0.059	0.084	1.58
5:00	0.15	0.13	0.17	0.17	0.14	0.13	0.14	0.12	0.16	0.14	0.17	0.16	1.79	30.41	0.059	0.081	1.17
6:00	0.15	0.13	0.17	0.15	0.14	0.12	0.15	0.13	0.14	0.14	0.19	0.15	1.77	30.54	0.058	0.080	1.11
7:00	0.15	0.14	0.17	0.14	0.14	0.12	0.14	0.14	0.16	0.13	0.16	0.17	1.78	30.60	0.058	0.084	1.61
8:00	0.15	0.14	0.16	0.13	0.13	0.14	0.12	0.17	0.14	0.12	0.14	0.15	1.69	29.33	0.058	0.086	1.56
9:00	0.14	0.14	0.15	0.13	0.11	0.14	0.12	0.16	0.13	0.12	0.15	0.14	1.65	28.26	0.058	0.082	1.41
10:00	0.15	0.15	0.16	0.12	0.13	0.12	0.10	0.13	0.14	0.13	0.15	0.14	1.61	28.25	0.057	0.077	1.10
11:00	0.16	0.15	0.15	0.13	0.13	0.10	0.09	0.13	0.12	0.11	0.15	0.15	1.58	27.01	0.058	0.077	1.10
12:00	0.15	0.14	0.14	0.13	0.12	0.11	0.12	0.14	0.12	0.13	0.18	0.15	1.64	27.55	0.060	0.082	1.22
13:00	0.15	0.14	0.14	0.14	0.11	0.13	0.10	0.13	0.16	0.13	0.16	0.15	1.64	27.31	0.060	0.090	1.54
14:00	0.14	0.13	0.14	0.16	0.10	0.18	0.13	0.16	0.16	0.14	0.13	0.15	1.72	27.04	0.063	0.097	1.63
15:00	0.13	0.14	0.13	0.15	0.11	0.15	0.16	0.21	0.15	0.13	0.12	0.14	1.74	27.15	0.064	0.103	1.55
16:00	0.14	0.14	0.15	0.16	0.12	0.20	0.17	0.18	0.13	0.13	0.13	0.14	1.78	28.46	0.063	0.098	1.60
17:00	0.13	0.14	0.15	0.16	0.14	0.20	0.25	0.17	0.11	0.14	0.12	0.14	1.85	29.44	0.063	0.099	1.34
18:00	0.13	0.12	0.15	0.16	0.13	0.18	0.18	0.14	0.12	0.12	0.14	0.17	1.75	29.19	0.060	0.084	1.05
19:00	0.14	0.12	0.16	0.16	0.14	0.12	0.17	0.14	0.12	0.13	0.16	0.17	1.72	29.69	0.058	0.082	1.45
20:00	0.14	0.12	0.16	0.15	0.14	0.13	0.14	0.13	0.12	0.13	0.14	0.16	1.67	28.66	0.058	0.082	1.09
21:00	0.13	0.12	0.15	0.16	0.14	0.14	0.12	0.11	0.12	0.12	0.14	0.15	1.61	28.14	0.057	0.077	0.80
22:00	0.14	0.14	0.15	0.14	0.12	0.15	0.09	0.10	0.14	0.15	0.15	0.16	1.62	28.91	0.056	0.080	1.53
23:00	0.14	0.14	0.15	0.16	0.15	0.13	0.09	0.12	0.13	0.15	0.15	0.15	1.64	28.70	0.057	0.080	1.38
24:00	0.15	0.13	0.15	0.17	0.15	0.12	0.09	0.12	0.13	0.16	0.17	0.17	1.69	29.11	0.058	0.078	1.24

Day of Week Statistics
Weekday	Total	Records	Mean	Standard Deviation	Maximum	Duration
Sun	5.91	97.90	0.060	0.086	1.60	16.13
Mon	5.74	98.98	0.058	0.080	1.61	15.76
Tue	5.86	101.48	0.058	0.083	1.63	16.31
Wed	5.79	98.87	0.059	0.082	1.33	17.15
Thu	5.93	96.31	0.062	0.089	2.03	16.08
Fri	6.00	100.81	0.059	0.085	1.55	16.33
Sat	5.92	99.44	0.060	0.088	1.54	16.52

Year	Total	Records	Mean	Standard Deviation	Maximum	Duration (h)	Interevent (h)	≥0.00	≥0.05	≥0.10	≥0.25	≥0.50	≥1.00	≥2.00
1894	36.28	661	0.055	0.080	1.07	16.37	193	87	64	55	37	26	12	1
1895	40.11	602	0.067	0.097	0.93	12.93	189	91	69	63	40	24	13	3
1896	37.34	781	0.048	0.056	0.57	17.27	172	91	71	58	45	29	9	2
1897	40.08	635	0.063	0.083	0.67	11.41	173	100	75	65	46	29	12	2
1898	49.66	842	0.059	0.073	0.91	14.58	138	94	81	74	57	30	15	4
1899	34.61	606	0.057	0.090	1.22	15.71	213	83	58	48	38	26	11	1
1900	43.97	618	0.071	0.080	0.60	15.95	194	87	64	55	40	24	15	5
1901	48.60	669	0.073	0.095	1.24	15.40	217	90	67	60	39	29	15	5
1902	33.76	604	0.056	0.067	0.73	14.27	199	90	68	56	40	26	11	1
1903	41.24	728	0.057	0.074	0.65	19.07	160	89	68	64	41	28	11	3
1904	39.62	689	0.058	0.079	0.85	13.09	190	103	78	64	41	22	6	2
1905	32.17	612	0.053	0.084	1.00	17.88	217	79	58	52	33	24	7	1
1906	40.69	637	0.064	0.098	1.53	13.95	212	100	76	62	39	28	12	2
1907	37.56	655	0.057	0.078	0.68	15.00	189	94	72	58	43	23	12	2
1908	30.04	508	0.059	0.092	1.55	12.27	218	80	65	57	35	22	7	0
1909	39.37	654	0.060	0.071	0.51	16.21	193	82	60	55	41	22	10	3
1910	28.32	558	0.051	0.060	0.65	15.59	188	93	63	52	38	19	8	0
1911	35.77	655	0.055	0.079	0.95	15.92	184	86	64	58	37	26	10	1
1912	34.55	611	0.057	0.082	1.34	13.95	179	86	64	55	41	26	11	1
1913	38.01	679	0.056	0.076	0.91	17.56	184	82	67	61	41	28	8	2
1914	34.27	651	0.053	0.062	0.51	16.77	177	76	56	50	38	24	12	2
1915	38.76	590	0.066	0.109	1.17	16.11	238	79	63	49	35	22	9	4
1916	37.36	785	0.048	0.071	1.27	17.95	199	100	75	63	38	29	9	3
1917	38.99	658	0.059	0.094	1.24	15.32	210	93	72	55	38	23	13	1
1918	33.56	621	0.054	0.077	0.87	15.00	250	96	71	57	31	21	12	2
1919	42.41	753	0.056	0.076	0.66	17.38	183	89	73	60	42	30	12	2
1920	46.13	786	0.059	0.071	0.56	18.26	198	88	68	58	42	30	15	5
1921	42.04	659	0.064	0.118	1.45	17.49	197	91	61	52	41	23	10	4
1922	41.12	624	0.066	0.089	0.92	17.85	202	72	59	53	38	21	11	4
1923	34.72	626	0.055	0.067	0.54	11.83	184	84	71	62	45	20	9	2
1924	36.99	536	0.069	0.101	0.82	13.30	193	79	62	57	39	22	8	2
1925	40.17	643	0.062	0.083	0.70	13.06	159	85	69	62	52	26	10	1
1926	39.28	572	0.069	0.106	0.94	11.61	190	85	69	55	44	24	10	3
1927	40.90	649	0.063	0.094	0.99	13.08	164	100	73	66	48	33	9	0
1928	38.35	636	0.060	0.089	0.89	13.59	175	88	67	57	43	29	11	2
1929	37.15	677	0.055	0.073	0.79	13.57	184	86	74	58	46	26	11	1
1930	34.87	617	0.057	0.081	0.87	16.89	191	79	63	50	36	22	10	2
1931	43.45	695	0.063	0.081	0.61	19.95	199	81	59	52	37	28	14	3
1932	41.61	632	0.066	0.091	0.75	16.39	220	88	60	51	35	25	11	4
1933	46.20	778	0.059	0.091	0.90	18.17	206	95	68	55	38	28	11	3
1934	34.71	628	0.055	0.079	0.91	13.55	205	95	73	63	40	28	6	2
1935	32.94	602	0.055	0.072	0.68	17.32	238	82	54	44	34	20	11	2
1936	47.05	723	0.065	0.084	0.91	14.47	175	100	65	57	45	29	20	3
1937	43.37	682	0.064	0.087	0.81	16.33	169	90	74	61	48	26	12	5
1938	50.52	852	0.059	0.095	1.38	19.07	173	102	77	63	46	24	15	4
1939	32.42	637	0.051	0.060	0.38	15.10	206	88	67	54	40	25	8	2
1940	36.08	745	0.048	0.062	0.64	20.34	244	99	64	49	31	19	13	1
1941	30.88	566	0.055	0.075	0.97	15.46	226	78	57	49	37	22	11	1
1942	42.47	729	0.058	0.085	0.85	13.80	171	86	67	55	45	27	16	1
1943	32.23	621	0.052	0.075	0.74	17.51	192	99	64	52	38	22	6	3
1944	37.06	650	0.057	0.096	0.85	19.11	196	76	60	46	37	26	11	3
1945	47.28	881	0.054	0.076	0.97	18.33	154	107	81	70	49	31	12	3
1946	38.08	618	0.062	0.085	1.09	15.32	184	84	68	55	38	22	12	3
1947	37.90	576	0.066	0.103	1.31	18.22	220	72	54	48	37	24	13	2
1948	40.38	771	0.052	0.073	0.96	18.22	159	91	77	66	48	32	9	2
1949	31.56	604	0.052	0.088	1.58	12.67	187	89	69	60	41	24	4	2
1950	32.71	700	0.047	0.070	0.67	18.25	236	94	68	58	36	16	10	1
1951	46.97	811	0.058	0.076	0.74	15.31	152	102	75	67	51	32	17	2
1952	40.60	749	0.054	0.092	1.63	17.62	164	95	68	56	42	26	13	3
1953	57.73	837	0.069	0.088	0.66	18.09	164	90	72	58	47	34	21	8
1954	62.32	875	0.071	0.116	1.22	19.10	167	109	80	65	47	31	18	6
1955	56.50	726	0.078	0.153	1.60	17.00	177	97	70	57	42	30	17	5
1956	47.39	882	0.054	0.077	0.95	18.55	173	102	73	62	49	36	11	4
1957	33.92	639	0.053	0.068	0.57	17.59	190	83	59	53	36	22	7	3
1958	61.63	961	0.064	0.087	0.97	18.24	134	104	77	64	54	39	22	8
1959	51.41	857	0.060	0.093	1.07	18.77	168	100	78	67	48	35	16	3
1960	44.46	666	0.067	0.102	1.54	16.93	192	86	63	54	42	31	17	5
1961	47.84	751	0.064	0.085	0.95	16.51	172	89	66	60	45	31	17	4
1962	43.23	734	0.059	0.076	0.75	17.92	216	93	64	55	37	24	10	5
1963	34.84	657	0.053	0.067	0.72	14.86	190	86	67	60	40	26	7	2
1964	36.47	677	0.054	0.075	0.82	18.45	211	91	58	50	36	24	12	0
1965	23.71	590	0.040	0.047	0.42	17.38	251	90	56	45	30	17	6	1
1966	36.01	648	0.056	0.075	0.90	16.08	228	94	63	52	37	26	11	0
1967	47.51	810	0.059	0.089	1.56	16.58	161	94	79	67	48	26	17	4
1968	42.26	681	0.062	0.070	0.48	15.95	209	85	63	53	39	30	15	2
1969	47.89	720	0.067	0.078	0.50	19.17	199	84	65	55	40	27	15	5
1970	41.91	733	0.057	0.074	0.95	16.45	190	89	72	60	42	28	13	4
1971	35.67	704	0.051	0.066	0.54	15.47	188	87	71	60	40	25	9	1
1972	53.09	921	0.058	0.078	0.85	16.04	146	113	87	73	53	39	15	4
1973	42.76	748	0.057	0.082	0.97	15.21	152	96	73	61	51	31	11	2
1974	40.34	652	0.062	0.091	0.88	13.38	168	97	73	62	45	26	9	3
1975	45.80	858	0.053	0.063	0.57	19.36	180	90	73	58	43	27	13	5
1976	36.72	647	0.057	0.089	0.93	13.91	173	92	73	60	45	23	9	2
1977	44.17	822	0.054	0.063	0.44	17.42	175	94	74	65	43	28	16	2
1978	37.64	668	0.056	0.075	1.00	17.83	201	81	63	49	38	23	11	4
1979	44.17	779	0.057	0.084	1.08	19.28	180	92	66	58	41	26	15	5
1980	29.47	512	0.058	0.079	0.70	12.37	241	89	68	52	35	18	9	0
1981	35.71	679	0.053	0.065	0.80	20.57	223	86	65	55	35	21	8	2
1982	44.61	716	0.062	0.083	0.90	17.12	190	87	64	55	38	29	13	3
1983	53.60	779	0.069	0.079	0.60	16.60	165	96	72	61	47	34	18	5
1984	50.09	744	0.067	0.086	0.66	16.93	178	91	66	56	44	29	15	4
1985	36.58	696	0.053	0.106	2.03	16.49	174	98	64	58	44	25	8	2
1986	44.33	682	0.065	0.081	0.66	17.31	214	90	68	57	39	27	13	4
1987	45.48	749	0.061	0.079	0.75	19.30	202	82	56	51	39	29	13	5
1988	34.78	588	0.059	0.082	0.73	13.08	221	96	67	55	37	21	9	3
1989	42.42	781	0.054	0.073	0.70	17.04	132	96	71	66	45	29	13	1
1990	46.50	711	0.065	0.099	0.93	17.86	201	91	69	57	44	29	14	6
1991	42.25	680	0.062	0.085	0.72	18.31	197	82	59	54	38	26	14	5
1992	43.72	733	0.060	0.092	0.97	17.04	178	95	71	59	47	23	10	4
1993	43.21	754	0.057	0.076	0.63	14.79	184	100	70	59	43	33	14	2
1994	47.60	806	0.059	0.087	0.84	18.63	153	97	71	60	43	29	16	4
1995	35.12	662	0.053	0.078	0.66	16.93	174	95	70	52	40	24	11	3
1996	49.43	744	0.066	0.086	0.73	15.59	159	95	77	61	51	30	13	3
1997	30.25	619	0.049	0.060	0.58	16.09	206	95	67	49	35	21	6	2
1998	53.20	690	0.077	0.117	1.34	17.16	173	83	62	58	42	28	15	7
1999	37.83	584	0.065	0.105	1.31	14.88	188	85	62	52	41	25	9	2
2000	44.52	676	0.066	0.090	0.72	16.51	173	86	69	59	46	35	10	3
2001	29.64	522	0.057	0.089	0.98	14.09	186	81	61	49	32	20	6	2
2002	39.92	732	0.055	0.069	0.91	17.84	181	92	71	62	44	33	12	2
2003	40.78	706	0.058	0.088	0.96	15.65	203	101	74	64	40	29	13	0
2004	43.55	646	0.067	0.096	0.74	19.89	184	87	65	51	37	28	12	4
2005	41.19	714	0.058	0.070	0.57	17.41	183	92	71	63	44	27	10	2
2006	51.89	763	0.068	0.083	0.58	18.22	172	91	73	64	45	26	13	6
2007	38.96	653	0.060	0.102	1.61	15.90	210	90	71	56	37	26	11	3
2008	53.10	756	0.070	0.101	0.98	14.21	137	99	81	73	57	33	15	5
2009	42.32	734	0.058	0.074	0.74	15.74	159	92	74	68	49	33	12	2
2010	47.14	672	0.070	0.112	1.51	18.58	215	87	54	47	35	23	13	5
2011	50.13	765	0.066	0.084	0.81	18.04	159	98	71	66	51	36	20	2
2012	36.73	626	0.059	0.099	1.33	17.65	223	90	64	52	37	29	11	1
2013	37.09	643	0.058	0.080	0.75	16.56	168	96	59	53	40	19	11	2
2014	44.86	749	0.060	0.076	0.80	17.96	155	93	64	62	50	32	12	4
2015	34.76	657	0.053	0.073	0.50	17.00	216	91	63	52	38	25	12	2
2016	32.60	598	0.055	0.069	0.68	14.43	189	95	68	55	35	20	12	0
2017	41.20	765	0.054	0.079	0.69	20.05	195	96	76	61	39	28	13	2
2018	49.47	774	0.064	0.098	1.12	15.19	149	105	82	71	53	41	19	1
2019	46.92	782	0.060	0.100	1.41	13.16	160	109	90	76	49	30	15	1
2020	36.29	630	0.058	0.086	1.23	15.24	199	89	69	56	40	27	10	0
2021	40.16	520	0.077	0.118	1.07	14.91	161	69	51	49	34	27	13	3
Mean	41.14	693.78	0.06	0.08	0.91	16.32	185.26	91.0	68.2	57.9	41.7	26.7	12.0	2.8

Longest drought = 36 days preceding 04/03/1915
Period of record = 127.67 years
Period missing = 0.00 years
Records = 88572
Mean event depth = 0.874 (≥.25 inches)
Annual event depth = 37.2 (≥.25 inches)
Mean event duration = 17.32 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

Rank	Depth	Date	Event ID	Hours	Records	Maximum	ARI (y)
1	11.94	8/18/1955 6:00	2571	40.00	36	1.41	182.34
2	8.86	5/12/2006 20:00	4746	95.00	77	0.43	61.33
3	7.89	10/20/1996 4:00	4355	33.00	31	0.73	39.71
4	7.86	9/15/1933 24:00	1645	42.00	41	0.90	39.14
5	7.01	10/5/1962 8:00	2894	61.00	55	0.59	25.31
6	6.98	3/13/2010 11:00	4931	58.00	58	0.43	24.90
7	6.77	6/4/1982 17:00	3732	83.00	77	0.36	22.14
8	6.77	6/12/1998 16:00	4421	43.00	32	1.34	22.14
9	6.04	7/9/1921 2:00	1118	22.00	14	1.45	14.21
10	6.03	3/31/2004 11:00	4654	44.00	41	0.53	14.12
11	6.00	5/30/1984 17:00	3825	76.00	56	0.43	13.85
12	5.91	10/17/1932 16:00	1607	66.00	57	0.61	13.05
13	5.74	5/15/1954 20:00	2516	18.00	18	0.98	11.64
14	5.73	12/11/1992 4:00	4182	53.00	41	0.49	11.56
15	5.72	10/12/1895 15:00	69	39.00	39	0.64	11.48
16	5.64	9/10/1954 19:00	2531	23.00	18	1.22	10.86
17	5.47	7/21/1938 6:00	1852	80.00	46	0.78	9.63
18	5.40	7/1/1915 3:00	883	50.00	34	1.17	9.15
19	5.35	6/5/1986 13:00	3906	62.00	46	0.54	8.82
20	5.22	4/27/1904 3:00	448	72.00	50	0.37	8.00
21	5.17	6/8/1931 15:00	1560	70.00	46	0.34	7.71
22	5.14	1/8/1956 16:00	2589	161.00	111	0.40	7.53
23	5.14	4/4/1987 9:00	3943	82.00	65	0.30	7.53
24	5.10	3/17/1968 15:00	3111	40.00	37	0.38	7.30
25	4.98	9/12/1944 19:00	2088	55.00	35	0.74	6.65
26	4.93	3/29/2010 3:00	4933	53.00	49	0.33	6.39
27	4.76	6/29/1921 19:00	1117	69.00	44	0.56	5.56
28	4.71	9/10/1999 8:00	4473	17.00	17	1.31	5.33
29	4.68	9/2/1905 23:00	499	38.00	34	0.91	5.20
30	4.63	7/31/1985 14:00	3872	14.00	13	2.03	4.99
31	4.59	12/26/1969 1:00	3181	51.00	39	0.41	4.82
32	4.48	8/22/2010 10:00	4947	79.00	53	1.09	4.38
33	4.37	8/25/1924 23:00	1249	17.00	17	0.78	3.98
34	4.35	10/8/1998 13:00	4437	82.00	58	0.60	3.91
35	4.27	9/9/1924 22:00	1253	15.00	15	0.82	3.64

Rank	Total	Date	Event ID	Gauge ARI (y)	Atlas ARI (y)
1	2.03	8/1/1985 2:00	3872	64	29
2	1.63	8/5/1952 14:00	2439	21	11
3	1.61	7/30/2007 7:00	4799	20	10
4	1.60	7/10/1955 16:00	2567	20	10
5	1.58	9/1/1949 4:00	2306	18	9
6	1.56	8/6/1967 8:00	3085	17	9
7	1.55	8/7/1908 15:00	616	17	9
8	1.54	6/4/1960 13:00	2800	16	8
9	1.53	10/9/1906 22:00	536	16	8
10	1.51	7/10/2010 15:00	4943	15	8
11	1.45	7/9/1921 19:00	1118	12	7
12	1.41	6/29/2019 16:00	5335	10	6
13	1.41	8/19/1955 9:00	2571	10	6
14	1.38	8/16/1938 23:00	1854	9	6
15	1.34	7/18/1912 17:00	766	8	5
16	1.34	6/13/1998 14:00	4421	8	5
17	1.33	7/18/2012 17:00	5029	8	5
18	1.31	9/2/1947 13:00	2218	7	5
19	1.31	9/10/1999 23:00	4473	7	5
20	1.27	7/3/1916 17:00	923	6	4
21	1.24	8/10/1917 7:00	966	5	4
22	1.24	8/24/1901 24:00	335	5	4
23	1.23	8/23/2020 17:00	5383	5	4
24	1.22	8/22/1899 19:00	256	5	4
25	1.22	9/11/1954 12:00	2531	5	4
26	1.21	7/28/2007 16:00	4798	5	4
27	1.17	7/1/1915 5:00	883	4	3
28	1.12	7/17/2018 17:00	5278	3	3
29	1.09	8/25/2010 10:00	4947	3	2
30	1.09	7/30/1946 20:00	2177	3	2
31	1.08	10/3/1979 17:00	3633	3	2
32	1.07	9/2/2021 4:00	5432	3	2
33	1.07	7/19/1959 20:00	2760	3	2
34	1.07	8/21/1894 13:00	25	3	2
35	1.06	7/31/2019 15:00	5340	3	2

Rank	Total	Date	Event ID	Gauge ARI (y)	Atlas ARI (y)
1	2.85	8/1/1985 2:00	3872	92	37
2	2.51	8/19/1955 9:00	2571	47	20
3	2.35	7/9/1921 2:00	1118	33	15
4	2.28	7/1/1915 5:00	883	28	13
5	2.25	8/6/1967 7:00	3085	26	12
6	2.21	7/10/1955 15:00	2567	24	12
7	2.01	9/10/1999 22:00	4473	14	8
8	1.98	8/10/1917 6:00	966	13	7
9	1.92	8/24/1901 24:00	335	11	7
10	1.90	5/16/1954 4:00	2516	11	6
11	1.89	7/28/2007 16:00	4798	10	6
12	1.88	9/11/1954 12:00	2531	10	6
13	1.83	9/1/1949 3:00	2306	9	6
14	1.82	8/21/1894 13:00	25	8	5
15	1.82	6/13/1998 14:00	4421	8	5
16	1.80	8/5/1952 14:00	2439	8	5
17	1.78	7/30/1926 5:00	1344	7	5
18	1.78	8/25/2010 9:00	4947	7	5
19	1.73	10/9/1906 22:00	536	6	5
20	1.70	9/15/1904 7:00	466	6	4
21	1.69	9/2/2021 3:00	5432	6	4
22	1.68	7/18/1912 17:00	766	6	4
23	1.67	8/16/1938 23:00	1854	5	4
24	1.67	8/7/1908 14:00	616	5	4
25	1.67	7/30/2007 6:00	4799	5	4
26	1.66	7/24/1926 8:00	1343	5	4
27	1.65	7/10/2010 14:00	4943	5	4
28	1.62	9/12/1960 14:00	2809	5	4
29	1.62	8/18/1994 5:00	4257	5	4
30	1.57	9/16/1933 8:00	1645	4	3
31	1.55	6/4/1960 13:00	2800	4	3
32	1.54	6/19/1942 23:00	1999	4	3
33	1.53	7/3/1916 17:00	923	4	3
34	1.53	8/3/2001 19:00	4554	4	3
35	1.51	8/4/1915 15:00	887	3	3

Rank	Total	Date	Event ID	Gauge ARI (y)	Atlas ARI (y)
1	3.61	8/19/1955 9:00	2571	95	56
2	3.58	8/1/1985 1:00	3872	91	53
3	3.02	6/13/1998 14:00	4421	42	22
4	2.92	7/1/1915 5:00	883	36	19
5	2.63	8/10/1917 6:00	966	22	12
6	2.58	7/9/1921 19:00	1118	20	11
7	2.50	8/6/1967 7:00	3085	18	10
8	2.49	9/11/1954 11:00	2531	17	10
9	2.49	9/10/1999 21:00	4473	17	10
10	2.40	5/16/1954 4:00	2516	15	8
11	2.38	7/10/1955 15:00	2567	14	8
12	2.22	9/16/1933 7:00	1645	10	6
13	2.20	7/30/1926 5:00	1344	10	6
14	2.18	7/24/1926 8:00	1343	9	6
15	2.16	7/28/2007 15:00	4798	9	6
16	2.16	8/25/2010 8:00	4947	9	6
17	2.12	9/2/2021 3:00	5432	8	5
18	2.03	8/26/1924 10:00	1249	7	5
19	2.03	8/21/1894 13:00	25	7	5
20	2.03	9/1/1949 3:00	2306	7	5
21	2.01	9/15/1904 6:00	466	6	4
22	1.96	10/14/1990 1:00	4089	6	4
23	1.95	8/18/1994 5:00	4257	5	4
24	1.94	8/24/1901 24:00	335	5	4
25	1.93	9/12/1960 14:00	2809	5	4
26	1.92	9/20/1899 8:00	258	5	4
27	1.89	9/10/1924 2:00	1253	5	4
28	1.89	7/28/1911 12:00	722	5	4
29	1.89	10/9/1906 22:00	536	5	4
30	1.85	11/23/1992 3:00	4179	4	3
31	1.85	8/4/1915 15:00	887	4	3
32	1.82	10/20/1996 6:00	4355	4	3
33	1.81	6/19/1942 23:00	1999	4	3
34	1.81	8/5/1952 13:00	2439	4	3
35	1.80	7/21/1938 16:00	1852	4	3

Rank	Total	Date	Event ID	Gauge ARI (y)	Atlas ARI (y)
1	5.46	8/19/1955 6:00	2571	128	135
2	4.18	9/11/1954 10:00	2531	50	32
3	4.15	7/31/1985 22:00	3872	48	31
4	4.03	5/16/1954 1:00	2516	43	26
5	3.71	6/13/1998 14:00	4421	31	18
6	3.62	9/10/1999 18:00	4473	28	16
7	3.53	9/16/1933 5:00	1645	26	15
8	3.37	7/1/1915 3:00	883	21	12
9	3.33	10/14/1990 1:00	4089	20	11
10	3.24	8/26/1924 9:00	1249	18	10
11	3.13	9/2/2021 0:00	5432	16	9
12	3.10	11/23/1992 3:00	4179	15	8
13	3.05	9/10/1924 2:00	1253	14	8
14	3.05	10/20/1996 6:00	4355	14	8
15	2.93	8/10/1917 5:00	966	12	7
16	2.79	9/15/1904 3:00	466	9	6
17	2.76	7/28/1911 10:00	722	9	6
18	2.70	12/6/1937 19:00	1818	8	5
19	2.66	7/9/1921 19:00	1118	8	5
20	2.61	7/17/2018 14:00	5278	7	5
21	2.60	8/6/1967 6:00	3085	7	4
22	2.57	8/25/2010 6:00	4947	6	4
23	2.57	9/20/1899 6:00	258	6	4
24	2.52	7/1/2021 21:00	5420	6	4
25	2.49	10/31/1895 22:00	70	6	4
26	2.39	9/17/1995 13:00	4296	5	3
27	2.39	7/10/1955 15:00	2567	5	3
28	2.37	9/14/1944 20:00	2088	4	3
29	2.37	10/13/1895 15:00	69	4	3
30	2.34	8/5/1952 14:00	2439	4	3
31	2.33	9/16/1932 9:00	1605	4	3
32	2.31	9/12/1960 12:00	2809	4	3
33	2.30	9/13/1918 3:00	1002	4	3
34	2.30	7/30/1926 4:00	1344	4	3
35	2.29	7/24/1926 6:00	1343	4	3

Rank	Total	Date	Event ID	Gauge ARI (y)	Atlas ARI (y)
1	6.74	8/19/1955 5:00	2571	131	132
2	5.54	5/15/1954 21:00	2516	65	45
3	5.44	9/11/1954 5:00	2531	61	41
4	5.01	9/16/1933 2:00	1645	45	26
5	4.94	10/20/1996 5:00	4355	43	24
6	4.81	6/13/1998 7:00	4421	38	21
7	4.37	9/10/1999 13:00	4473	26	14
8	4.30	7/31/1985 16:00	3872	25	13
9	4.11	9/9/1924 22:00	1253	20	11
10	4.05	9/1/2021 19:00	5432	19	10
11	3.97	8/26/1924 3:00	1249	18	9
12	3.85	7/1/1915 3:00	883	15	8
13	3.63	10/13/1990 18:00	4089	12	6
14	3.59	6/6/2000 12:00	4506	11	6
15	3.48	9/14/1904 24:00	466	10	5
16	3.46	7/28/1911 6:00	722	9	5
17	3.43	11/22/1992 22:00	4179	9	5
18	3.38	7/9/1921 2:00	1118	8	5
19	3.24	10/13/1895 9:00	69	7	4
20	3.23	12/12/1992 2:00	4182	7	4
21	3.16	4/1/2004 13:00	4654	6	4
22	3.13	10/5/1995 19:00	4299	6	4
23	3.08	5/31/1984 7:00	3825	5	4
24	3.01	6/9/1931 16:00	1560	5	3
25	3.01	9/3/1972 5:00	3302	5	3
26	3.00	10/5/1962 20:00	2894	5	3
27	2.97	8/10/1917 3:00	966	4	3
28	2.92	3/31/1934 18:00	1665	4	3
29	2.92	4/21/1991 4:00	4113	4	3
30	2.91	10/15/1930 5:00	1527	4	3
31	2.91	12/6/1937 16:00	1818	4	3
32	2.87	7/1/2021 20:00	5420	4	3
33	2.86	9/16/1932 8:00	1605	4	3
34	2.86	9/18/2004 3:00	4676	4	3
35	2.85	11/12/1947 5:00	2223	4	3

Rank	Total	Date	Event ID	Gauge ARI (y)	Atlas ARI (y)
1	8.35	8/18/1955 13:00	2571	149	134
2	6.65	10/20/1996 5:00	4355	61	39
3	6.04	7/9/1921 2:00	1118	41	24
4	5.82	6/13/1998 8:00	4421	35	20
5	5.74	5/15/1954 20:00	2516	33	19
6	5.64	9/10/1954 19:00	2531	31	17
7	5.63	9/16/1933 1:00	1645	30	17
8	5.14	12/11/1992 16:00	4182	21	12
9	4.96	10/12/1895 22:00	69	18	10
10	4.73	5/13/2006 10:00	4746	14	8
11	4.71	9/10/1999 8:00	4473	14	8
12	4.63	7/31/1985 14:00	3872	13	8
13	4.46	7/1/1915 3:00	883	11	7
14	4.37	8/25/1924 23:00	1249	10	6
15	4.29	4/1/2004 1:00	4654	9	6
16	4.27	9/9/1924 22:00	1253	9	6
17	4.26	10/5/1962 11:00	2894	9	6
18	4.25	9/3/1905 5:00	499	9	6
19	4.23	9/1/2021 12:00	5432	9	5
20	4.19	6/9/1931 8:00	1560	8	5
21	4.18	6/6/2000 9:00	4506	8	5
22	4.17	5/31/1984 2:00	3825	8	5
23	4.17	12/26/1969 6:00	3181	8	5
24	4.13	3/17/1968 22:00	3111	8	5
25	4.03	6/5/1986 21:00	3906	7	5
26	3.91	10/13/1990 9:00	4089	6	4
27	3.76	11/22/1992 12:00	4179	5	4
28	3.69	6/18/1922 22:00	1156	5	3
29	3.69	10/14/2005 18:00	4721	5	3
30	3.67	10/1/1984 14:00	3837	4	3
31	3.65	10/18/1932 12:00	1607	4	3
32	3.64	5/25/1967 10:00	3075	4	3
33	3.62	3/29/2010 15:00	4933	4	3
34	3.60	8/9/1917 9:00	966	4	3
35	3.58	6/7/2013 7:00	5066	4	3

Rank	Total	Date	Event ID	Gauge ARI (y)	Atlas ARI (y)
1	11.94	8/18/1955 6:00	2571	206	278
2	7.89	10/20/1996 4:00	4355	48	36
3	7.86	9/15/1933 24:00	1645	47	35
4	7.79	5/12/2006 23:00	4746	46	34
5	6.77	6/12/1998 16:00	4421	27	18
6	6.74	10/5/1962 14:00	2894	27	17
7	6.33	3/13/2010 14:00	4931	21	13
8	6.04	7/9/1921 2:00	1118	17	11
9	6.03	3/31/2004 11:00	4654	17	11
10	5.98	6/4/1982 21:00	3732	17	10
11	5.74	5/15/1954 20:00	2516	14	9
12	5.72	12/11/1992 14:00	4182	14	9
13	5.72	10/12/1895 15:00	69	14	9
14	5.69	9/10/1954 2:00	2531	14	9
15	5.66	10/18/1932 8:00	1607	13	9
16	5.35	7/1/1915 3:00	883	11	7
17	5.10	3/17/1968 15:00	3111	9	6
18	5.00	6/5/1986 13:00	3906	8	5
19	4.96	6/9/1931 3:00	1560	8	5
20	4.94	4/27/1904 11:00	448	8	5
21	4.90	3/29/2010 3:00	4933	7	5
22	4.71	9/10/1999 8:00	4473	6	4
23	4.69	5/31/1984 2:00	3825	6	4
24	4.68	9/2/1905 23:00	499	6	4
25	4.68	9/13/1944 1:00	2088	6	4
26	4.63	7/31/1985 14:00	3872	6	4
27	4.54	12/26/1969 1:00	3181	5	4
28	4.37	8/25/1924 23:00	1249	5	4
29	4.35	4/5/1987 0:00	3943	5	4
30	4.28	9/9/1924 5:00	1253	4	3
31	4.24	6/6/2000 8:00	4506	4	3
32	4.23	9/1/2021 12:00	5432	4	3
33	4.22	7/1/2021 21:00	5420	4	3
34	4.16	10/13/2005 22:00	4721	4	3
35	4.15	6/18/1922 6:00	1156	4	3

Rank	Total	Date	Event ID	Gauge ARI (y)	Atlas ARI (y)
1	12.47	8/17/1955 13:00	2570	208	238
2	8.34	5/12/2006 20:00	4746	49	32
3	7.99	10/20/1996 4:00	4355	42	25
4	7.88	9/14/1933 20:00	1645	40	24
5	7.68	6/13/1998 2:00	4421	36	21
6	7.01	10/5/1962 8:00	2894	25	15
7	6.98	3/13/2010 11:00	4931	25	14
8	6.53	6/4/1982 21:00	3732	19	11
9	6.04	7/9/1921 2:00	1118	14	8
10	6.03	3/31/2004 11:00	4654	14	8
11	5.99	5/30/1984 22:00	3825	13	8
12	5.91	10/17/1932 16:00	1607	13	7
13	5.82	9/9/1954 3:00	2531	12	7
14	5.74	5/15/1954 20:00	2516	11	7
15	5.73	12/11/1992 4:00	4182	11	7
16	5.72	10/12/1895 15:00	69	11	7
17	5.43	7/1/1915 3:00	883	9	5
18	5.35	6/5/1986 13:00	3906	8	5
19	5.27	7/21/1938 13:00	1852	8	5
20	5.22	4/27/1904 3:00	448	8	5
21	5.17	6/8/1931 15:00	1560	7	5
22	5.11	3/17/1968 15:00	3111	7	4
23	5.02	4/4/1987 9:00	3943	6	4
24	4.99	9/8/1999 7:00	4472	6	4
25	4.98	9/12/1944 19:00	2088	6	4
26	4.93	3/29/2010 3:00	4933	6	4
27	4.93	11/22/1953 23:00	2490	6	4
28	4.92	7/1/2021 12:00	5420	6	4
29	4.81	6/18/1922 22:00	1156	5	4
30	4.76	6/29/1921 19:00	1117	5	4
31	4.68	9/2/1905 23:00	499	5	3
32	4.63	7/31/1985 14:00	3872	5	3
33	4.59	12/26/1969 1:00	3181	4	3
34	4.52	7/30/1946 20:00	2177	4	3
35	4.43	8/22/2010 13:00	4947	4	3

Rank	Total	Date	Event ID	Gauge ARI (y)	Atlas ARI (y)
1	12.47	8/17/1955 13:00	2570	189	198
2	8.86	5/12/2006 20:00	4746	58	34
3	8.07	10/20/1996 4:00	4355	41	21
4	8.06	6/12/1998 16:00	4421	41	21
5	7.96	9/14/1933 5:00	1645	39	20
6	7.01	10/5/1962 8:00	2894	24	12
7	6.98	3/13/2010 11:00	4931	24	11
8	6.77	6/4/1982 17:00	3732	21	10
9	6.26	5/29/1984 21:00	3824	15	7
10	6.06	3/31/2004 13:00	4654	13	7
11	6.04	7/9/1921 2:00	1118	13	7
12	5.91	10/17/1932 16:00	1607	12	6
13	5.90	9/7/1954 18:00	2530	12	6
14	5.86	7/20/1938 8:00	1851	12	6
15	5.79	10/12/1895 15:00	69	11	6
16	5.75	5/12/1954 18:00	2516	11	5
17	5.73	12/11/1992 4:00	4182	10	5
18	5.44	7/1/1915 3:00	883	8	5
19	5.39	4/27/1904 3:00	448	8	4
20	5.36	6/5/1986 13:00	3906	8	4
21	5.31	9/7/1999 3:00	4471	8	4
22	5.30	6/7/2013 7:00	5066	7	4
23	5.24	6/7/1931 12:00	1560	7	4
24	5.20	6/18/1922 6:00	1156	7	4
25	5.17	3/17/1968 16:00	3111	7	4
26	5.14	4/4/1987 9:00	3943	7	4
27	5.08	6/30/2021 18:00	5420	6	4
28	4.98	9/12/1944 19:00	2088	6	3
29	4.93	3/29/2010 3:00	4933	5	3
30	4.93	11/22/1953 23:00	2490	5	3
31	4.81	6/29/1921 1:00	1117	5	3
32	4.69	9/2/1905 23:00	499	4	3
33	4.63	12/24/1969 6:00	3181	4	3
34	4.63	3/12/1953 22:00	2460	4	3
35	4.63	7/31/1985 14:00	3872	4	3

Rank	Total	Date	Event ID	Gauge ARI (y)	Atlas ARI (y)
1	13.52	8/17/1955 13:00	2570	168	201
2	10.37	5/9/2006 13:00	4745	63	49
3	8.96	6/2/1982 2:00	3731	36	22
4	8.45	6/12/1998 16:00	4421	28	17
5	8.37	9/10/1999 8:00	4473	27	16
6	8.07	10/20/1996 4:00	4355	23	13
7	7.96	9/14/1933 9:00	1645	22	13
8	7.95	5/15/1954 20:00	2516	22	13
9	7.75	3/31/1987 3:00	3942	20	11
10	7.67	7/18/1938 9:00	1851	19	11
11	7.64	5/26/1984 20:00	3823	19	10
12	7.52	6/7/2013 9:00	5066	17	10
13	7.15	6/9/1931 8:00	1560	14	8
14	7.07	9/10/1954 19:00	2531	13	8
15	7.06	10/5/1962 8:00	2894	13	8
16	7.06	3/11/2010 11:00	4931	13	8
17	6.74	3/12/1968 18:00	3110	11	6
18	6.40	12/11/1992 4:00	4182	9	5
19	6.30	7/9/1921 2:00	1118	8	5
20	6.29	3/31/2004 11:00	4654	8	5
21	6.10	10/8/2005 15:00	4720	7	4
22	6.09	6/5/1986 14:00	3906	7	4
23	6.03	10/8/1895 12:00	68	6	4
24	5.97	6/1/2006 20:00	4749	6	4
25	5.94	12/22/1969 6:00	3180	6	4
26	5.91	10/17/1932 16:00	1607	6	4
27	5.90	9/20/1961 23:00	2854	6	4
28	5.66	7/26/1985 10:00	3871	5	3
29	5.63	9/13/1987 10:00	3959	5	3
30	5.62	7/1/1915 3:00	883	5	3
31	5.47	7/1/2021 12:00	5420	4	3
32	5.47	11/4/1969 12:00	3172	4	3
33	5.46	8/5/1952 7:00	2439	4	3
34	5.44	4/25/1904 4:00	448	4	3
35	5.24	10/8/1998 13:00	4437	3	2

Rank	Total	Date	Event ID	Gauge ARI (y)	Atlas ARI (y)
1	14.25	8/17/1955 13:00	2570	144	196
2	10.80	5/9/2006 13:00	4745	49	40
3	10.57	6/29/1921 22:00	1117	45	35
4	9.80	5/29/1982 5:00	3730	33	23
5	9.58	5/7/1954 2:00	2514	30	20
6	9.53	9/27/1962 10:00	2893	29	20
7	8.95	9/7/1999 3:00	4471	23	14
8	8.94	3/13/2010 12:00	4931	22	14
9	8.48	6/8/1998 18:00	4421	18	11
10	8.46	6/7/1931 12:00	1560	18	11
11	8.28	10/20/1996 4:00	4355	16	10
12	8.03	9/9/1933 2:00	1645	14	9
13	7.90	3/31/1987 3:00	3942	13	8
14	7.80	6/30/2021 18:00	5420	12	8
15	7.78	7/18/1938 9:00	1851	12	7
16	7.76	5/23/1984 19:00	3823	12	7
17	7.73	9/7/1954 11:00	2530	12	7
18	7.70	6/7/2013 0:00	5066	12	7
19	7.49	7/1/1915 3:00	883	10	6
20	7.06	11/3/1969 2:00	3171	8	5
21	6.97	3/10/1968 18:00	3110	7	5
22	6.91	10/17/1932 24:00	1607	7	5
23	6.64	12/3/1992 2:00	4181	6	4
24	6.62	6/5/1986 13:00	3906	6	4
25	6.58	7/11/1959 5:00	2758	6	4
26	6.48	3/26/2004 23:00	4654	5	4
27	6.46	6/1/2006 20:00	4749	5	3
28	6.46	10/7/2005 23:00	4720	5	3
29	6.22	12/22/1969 6:00	3180	4	3
30	6.21	6/11/1922 16:00	1155	4	3
31	6.14	3/2/1983 4:00	3764	4	3
32	6.10	10/8/1895 12:00	68	4	3
33	6.07	8/23/2021 17:00	5431	4	3
34	6.02	8/13/1994 7:00	4256	4	3
35	5.98	7/30/1946 20:00	2177	4	3

Rank	Total	Date	Event ID	Gauge ARI (y)	Atlas ARI (y)
1	16.81	8/11/1955 17:00	2569	130	193
2	14.48	3/11/2010 11:00	4931	67	72
3	12.86	5/3/1954 9:00	2513	39	32
4	12.21	5/1/2006 22:00	4744	31	23
5	12.04	6/2/1982 2:00	3731	29	21
6	11.48	8/28/1933 17:00	1642	23	16
7	11.24	6/26/1921 9:00	1117	21	15
8	10.92	6/12/1998 16:00	4421	18	12
9	10.86	9/17/1962 19:00	2892	18	12
10	10.59	8/31/1954 0:00	2529	16	10
11	10.58	11/23/1992 2:00	4179	16	10
12	10.50	10/8/1996 17:00	4354	15	10
13	10.09	3/12/1953 22:00	2460	12	8
14	10.04	6/22/2021 15:00	5419	12	8
15	9.95	8/25/1924 23:00	1249	11	8
16	9.85	5/29/2013 22:00	5064	11	7
17	9.40	12/8/1969 4:00	3177	9	6
18	9.36	9/6/1999 12:00	4471	8	5
19	9.15	3/31/1987 3:00	3942	8	5
20	9.11	7/10/1938 2:00	1850	7	5
21	9.00	1/6/1979 4:00	3600	7	5
22	8.95	10/7/2005 23:00	4720	7	4
23	8.90	6/7/1931 12:00	1560	7	4
24	8.89	9/8/1918 16:00	1001	7	4
25	8.86	3/26/2004 23:00	4654	6	4
26	8.80	9/15/1961 1:00	2853	6	4
27	8.73	10/18/1932 10:00	1607	6	4
28	8.71	3/1/1983 20:00	3764	6	4
29	8.62	10/12/1895 15:00	69	6	4
30	8.29	7/30/1946 20:00	2177	5	3
31	8.24	5/13/1984 22:00	3823	4	3
32	8.12	7/2/1959 0:00	2756	4	3
33	8.12	11/3/1969 1:00	3171	4	3
34	8.09	11/23/1953 3:00	2490	4	3
35	8.07	10/27/2018 11:00	5294	4	3

Rank	Total	Date	Event ID	Gauge ARI (y)	Atlas ARI (y)
1	17.19	5/9/2006 13:00	4745	88	92
2	17.16	8/7/1955 4:00	2568	87	91
3	15.36	3/11/2010 11:00	4931	49	41
4	15.25	4/16/1954 12:00	2510	48	39
5	13.65	5/23/1982 2:00	3729	26	19
6	13.39	6/26/1938 10:00	1848	24	16
7	12.93	6/29/1921 24:00	1117	20	13
8	12.86	8/20/1933 1:00	1640	19	13
9	12.19	3/15/1953 11:00	2461	14	9
10	12.05	11/21/1992 15:00	4179	13	9
11	11.94	5/31/1998 23:00	4419	13	8
12	11.91	10/11/1932 15:00	1607	13	8
13	11.57	5/19/2013 18:00	5062	11	7
14	11.55	9/22/1996 16:00	4351	11	7
15	11.43	8/12/1924 10:00	1248	10	6
16	11.35	3/31/1987 3:00	3942	10	6
17	11.21	8/4/2021 19:00	5427	9	6
18	11.10	9/14/1962 18:00	2892	8	6
19	11.04	7/30/1946 20:00	2177	8	5
20	10.90	8/31/1954 0:00	2529	8	5
21	10.89	3/31/2004 11:00	4654	8	5
22	10.62	1/8/1978 21:00	3559	7	4
23	10.59	6/14/2021 9:00	5418	6	4
24	10.54	5/3/1984 19:00	3821	6	4
25	10.51	9/6/1999 12:00	4471	6	4
26	10.50	1/1/1979 9:00	3599	6	4
27	10.39	10/27/1953 22:00	2488	6	4
28	10.28	2/11/1983 23:00	3762	5	4
29	10.05	10/6/1955 12:00	2579	5	3
30	9.97	11/15/1983 22:00	3795	5	3
31	9.94	6/7/1931 12:00	1560	5	3
32	9.90	6/22/1959 9:00	2754	4	3
33	9.86	11/2/2018 23:00	5296	4	3
34	9.86	12/8/1969 3:00	3177	4	3
35	9.67	12/29/1957 5:00	2674	4	3

Rank	Total	Date	Event ID	Gauge ARI (y)	Atlas ARI (y)
1	19.64	5/12/2006 20:00	4746	84	86
2	18.83	8/11/1955 17:00	2569	65	61
3	18.22	2/24/2010 1:00	4929	53	46
4	18.16	4/16/1954 12:00	2510	52	45
5	16.04	3/12/1953 22:00	2460	24	18
6	15.42	5/4/1998 1:00	4415	19	14
7	15.39	9/7/1996 19:00	4349	19	14
8	15.04	5/20/1982 15:00	3729	16	12
9	14.96	6/11/1938 10:00	1846	16	12
10	14.88	6/6/1959 14:00	2750	15	11
11	14.48	5/28/2021 19:00	5415	13	9
12	14.37	9/27/1962 3:00	2893	12	9
13	14.34	6/26/1921 9:00	1117	12	9
14	14.21	10/23/1953 9:00	2487	11	8
15	14.08	8/4/1933 3:00	1638	11	8
16	13.72	9/6/1999 12:00	4471	9	7
17	13.53	2/6/1983 20:00	3761	8	6
18	13.53	11/3/1992 4:00	4176	8	6
19	13.42	8/3/1954 9:00	2527	8	6
20	13.24	10/13/1895 1:00	69	7	5
21	13.14	7/31/1924 16:00	1245	7	5
22	13.10	5/8/1931 17:00	1554	7	5
23	13.00	2/15/1984 0:00	3809	6	5
24	13.00	12/9/1957 4:00	2670	6	5
25	12.78	7/1/1915 3:00	883	6	4
26	12.75	3/22/1987 0:00	3941	6	4
27	12.69	5/8/2013 23:00	5061	6	4
28	12.53	11/3/1983 16:00	3793	5	4
29	12.50	9/28/1932 4:00	1606	5	4
30	12.48	3/7/1933 16:00	1622	5	4
31	12.38	3/20/2004 20:00	4653	5	4
32	12.29	11/19/1986 2:00	3924	5	3
33	12.21	10/21/2018 8:00	5293	4	3
34	12.15	3/20/1901 20:00	313	4	3
35	12.15	10/6/1955 12:00	2579	4	3

Rank	Total	Date	Event ID	Gauge ARI (y)	Atlas ARI (y)
1	23.34	8/18/1955 6:00	2571	108	170
2	22.59	5/1/2006 22:00	4744	87	120
3	19.67	4/16/1954 12:00	2510	35	37
4	19.11	2/16/2010 9:00	4928	28	29
5	18.84	3/4/1953 1:00	2459	26	26
6	18.18	5/2/1998 0:00	4414	20	20
7	17.92	11/3/1969 1:00	3171	18	18
8	17.92	5/29/1982 13:00	3730	18	18
9	17.20	6/30/2021 18:00	5420	14	14
10	17.00	10/23/1953 9:00	2487	13	12
11	16.98	5/26/1938 15:00	1844	13	12
12	16.97	5/23/1959 21:00	2749	13	12
13	16.93	11/30/1957 13:00	2669	13	12
14	16.65	8/23/1996 20:00	4346	11	11
15	16.58	3/1/1983 18:00	3764	11	10
16	15.91	2/20/1933 7:00	1619	8	8
17	15.91	9/25/1962 23:00	2893	8	8
18	15.86	9/16/1932 5:00	1605	8	8
19	15.81	6/26/1921 9:00	1117	8	7
20	15.64	3/21/1901 11:00	313	7	7
21	15.33	7/20/1933 22:00	1637	6	6
22	15.25	1/30/1984 22:00	3806	6	6
23	15.18	3/14/1958 8:00	2683	6	6
24	15.02	2/12/1993 13:00	4188	6	5
25	15.00	10/8/1895 12:00	68	6	5
26	14.99	7/21/1954 4:00	2524	6	5
27	14.98	4/4/1984 23:00	3818	5	5
28	14.95	9/6/1999 12:00	4471	5	5
29	14.92	11/27/1978 17:00	3593	5	5
30	14.92	4/26/1931 6:00	1553	5	5
31	14.70	11/6/1986 1:00	3921	5	5
32	14.61	10/23/1983 20:00	3792	5	4
33	14.61	5/29/2013 4:00	5063	5	4
34	14.59	11/17/1992 15:00	4179	5	4
35	14.53	11/28/1977 3:00	3552	5	4

Frequency Estimates
Duration	Average Recurrence Interval													GEV			Constraint adjustment
Duration	1-mo	3-mo	6-mo	1-y	2-y	5-y	10-y	25-y	50-y	100-y	200-y	500-y	1000-y	ξ	α	κ	Constraint adjustment
Event	1.00	1.74	2.28	2.75	3.63	4.63	5.52	6.99	8.39	10.1	12.3	15.9	19.4	3.369	0.6619	-0.3097	1.
1-hour	.270	.450	.580	.798	1.01	1.22	1.40	1.68	1.93	2.22	2.56	3.11	3.61	0.9477	0.1532	-0.2361	1.08
2-hour	.410	.650	.840	1.04	1.35	1.64	1.88	2.24	2.54	2.89	3.29	3.91	4.46	1.262	0.2194	-0.1944	1.04
3-hour	.510	.800	1.01	1.21	1.55	1.91	2.22	2.69	3.13	3.65	4.27	5.28	6.21	1.452	0.2510	-0.2555	1.02
6-hour	.690	1.11	1.37	1.68	2.02	2.43	2.82	3.50	4.19	5.08	6.23	8.29	10.4	1.916	0.2561	-0.3764	1.01
12-hour	.860	1.41	1.77	2.18	2.56	3.04	3.51	4.32	5.15	6.24	7.66	10.2	12.9	2.443	0.2949	-0.3903	1.00
1-day	.970	1.63	2.09	2.50	3.09	3.77	4.38	5.38	6.34	7.54	9.02	11.6	14.0	2.919	0.4440	-0.3168	1.00
2-day	1.05	1.79	2.31	2.82	3.56	4.45	5.26	6.63	7.97	9.67	11.8	15.6	19.3	3.343	0.5640	-0.3436	1.00
3-day	1.11	1.91	2.50	3.01	3.80	4.73	5.57	6.99	8.38	10.1	12.3	16.2	19.9	3.563	0.5959	-0.3372	1.00
4-day	1.16	2.07	2.68	3.25	3.97	4.85	5.67	7.08	8.51	10.3	12.7	16.9	21.1	3.753	0.5462	-0.3678	1.00
7-day	1.27	2.41	3.14	3.87	4.71	5.71	6.63	8.20	9.75	11.7	14.2	18.6	22.9	4.457	0.6368	-0.3484	1.00
10-day	1.31	2.79	3.59	4.31	5.28	6.42	7.45	9.17	10.8	12.9	15.6	20.1	24.6	4.993	0.7351	-0.3305	1.00
20-day	1.31	3.67	4.82	5.69	6.99	8.43	9.68	11.7	13.6	15.8	18.6	23.2	27.6	6.618	0.9696	-0.2848	1.00
30-day	1.31	4.24	5.87	7.03	8.53	10.1	11.4	13.5	15.4	17.6	20.3	24.5	28.5	8.103	1.103	-0.2499	1.00
45-day	1.31	4.56	7.17	8.92	10.7	12.5	13.9	16.1	18.0	20.2	22.8	26.8	30.3	10.21	1.297	-0.2095	1.00
60-day	1.31	4.56	8.37	10.6	12.7	14.8	16.4	18.7	20.8	23.1	25.6	29.6	33.0	12.12	1.540	-0.1772	1.00

90% confidence intervals
Duration	1-y	2-y	5-y	10-y	25-y	50-y	100-y	200-y	500-y	1000-y
1-hour	0.77-0.82	0.98-1.04	1.17-1.29	1.31-1.51	1.51-1.87	1.66-2.25	1.81-2.74	1.98-3.33	2.23-4.39	2.43-5.47
2-hour	1.00-1.07	1.30-1.39	1.57-1.73	1.76-2.02	2.02-2.50	2.22-2.96	2.42-3.50	2.63-4.18	2.92-5.35	3.15-6.52
3-hour	1.17-1.24	1.50-1.60	1.83-2.01	2.08-2.41	2.41-3.10	2.68-3.78	2.98-4.69	3.30-5.82	3.74-7.96	4.13-10.11
6-hour	1.64-1.71	1.97-2.08	2.33-2.56	2.62-3.07	3.06-4.07	3.44-5.17	3.87-6.74	4.37-9.06	5.16-13.55	5.83-18.60
12-hour	2.12-2.21	2.50-2.63	2.92-3.21	3.27-3.79	3.78-4.98	4.22-6.34	4.73-8.38	5.32-11.37	6.25-17.45	7.07-24.38
1-day	2.42-2.55	3.00-3.20	3.60-3.99	4.06-4.74	4.72-6.15	5.27-7.69	5.89-9.76	6.57-12.76	7.54-18.27	8.33-24.26
2-day	2.72-2.88	3.44-3.71	4.21-4.74	4.83-5.75	5.74-7.75	6.52-9.90	7.39-12.96	8.35-17.13	9.85-25.21	11.12-34.09
3-day	2.91-3.08	3.68-3.94	4.49-5.02	5.15-6.06	6.07-8.04	6.88-10.29	7.79-13.42	8.82-17.72	10.39-26.08	11.75-35.35
4-day	3.16-3.31	3.86-4.10	4.63-5.12	5.25-6.15	6.20-8.18	7.01-10.45	7.96-13.60	9.02-18.15	10.62-27.18	11.98-36.97
7-day	3.75-3.93	4.58-4.85	5.46-6.05	6.19-7.24	7.22-9.56	8.07-12.02	9.08-15.40	10.17-20.08	11.77-29.35	13.18-39.89
10-day	4.18-4.39	5.13-5.44	6.12-6.79	6.90-8.08	8.07-10.56	9.06-13.13	10.13-16.76	11.31-21.87	13.02-31.57	14.45-41.99
20-day	5.51-5.80	6.80-7.21	8.06-8.84	9.04-10.35	10.41-13.16	11.50-16.17	12.70-20.19	14.01-25.59	16.00-35.01	17.61-44.82
30-day	6.82-7.15	8.30-8.76	9.72-10.57	10.77-12.20	12.21-15.06	13.36-18.04	14.53-21.85	15.78-26.88	17.47-35.94	18.92-45.65
45-day	8.67-9.06	10.45-10.98	12.08-13.00	13.28-14.80	14.88-17.76	16.03-20.64	17.31-24.13	18.63-28.55	20.42-36.20	21.91-43.49
60-day	10.26-10.73	12.41-13.01	14.25-15.34	15.58-17.29	17.31-20.41	18.57-23.38	19.90-26.97	21.19-31.47	22.88-38.90	24.26-45.80

GEV distribution fitted using L-moments for ≥1 year
Empirical results for periods <1 year
NOAA Atlas 14 frequency estimates
Input file: C:\Calcs\MetData\MA\Boston\Logan.1h
Analysis completed: 09/02/2021 11:58
Elapsed time : 272.4 seconds
Developed by Mitch Heineman, Ajay Prasad, Constantine Karos, and Masoud Soltani. CDM Smith, 1991-2021