HDSC USA Record Point Precipitation Measurements

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Greatest observed point precipitation values for the USA

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Duration	Amount (in)	Amount (mm)	Location	Lat (deg)	Long (deg)	Start date	Ref
1-min	1.23	31.2	Unionville, MD	38.80	-76.13	4 Jul 1956	2,3,4,5
5-min	2.03	52	Alamogordo Creek, NM	34.66	-104.39	5 Jun 1960	4
12-min	2.30	58	Embarrass, WI	44.67	-88.71	28 May 1881	4
15-min	3.95	100	Galveston, TX	29.29	-94.79	4 Jun 1871	4
30-min	7.00	178	Cambridge, OH	40.00	-81.58	16 Jul 1914	4
42-min	12.0	305	Holt, MO	39.45	-94.33	22 Jun 1947	1,4
	13.8*	351*	Burnsville 6 WNW, WV	38.88	-80.77	4 Aug 1943	4
60-min	12.0	305	Holt, MO	39.45	-94.33	22 Jun 1947	2,3,5
	12.0	305	Kilauea Sugar Plantation, Kauai, HI	22.21	-159.41	24 Jan 1956	3,5
90-min	14.6*	371*	Burnsville 6 WNW, WV	38.88	-80.77	4 Aug 1943	4
2-hr	15.0	381	Woodward Ranch (D'Hanis), TX	29.49	-99.38	31 May 1935	4
2.17-hr	19.0	483	Rockport, WV	39.07	-81.55	18 Jul 1889	1
2.75-hr	22.0	559	Woodward Ranch (D'Hanis), TX	29.49	-99.38	31 May 1935	1,4
3-hr	28.5	724	Smethport, PA	41.80	-78.45	18 Jul 1942	4
4.5-hr	30.7	780	Smethport, PA	41.80	-78.45	18 Jul 1942	1,4
12-hr	34.3	871	Smethport, PA	41.80	-78.45	17 Jul 1942	4
18-hr	36.4	925	Thrall, TX	30.59	-97.30	9 Sep 1921	4
24-hr	43.0	1092	Alvin, TX	29.42	-95.24	25 Jul 1979	3,4,5
4-day	62.0	1575	Kukaiau, Hamakua, HI	20.02	-155.37	27 Feb 1902	4
8-day	82.0	2083	Kukaiau, Hamakua, HI	20.02	-155.37	28 Feb 1902	4
1-month	149	3800	Mt. Waialeale, Kauai, HI	22.07	-159.50	1 Mar 1982	4
12-month	739	18780	Kukui, Maui, HI	20.90	-156.60	1 Dec 1981	3

Disclaimers: Some data are estimates. Not all data have been verified. "*" indicates questionable veracity. Coordinates are approximate.

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