OK01 Coop Summary

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Cooperative Observer Station Summary

ALVA (340193)
*	WOODS County	Climate Division: 2
*	Latitude: 3648N; Longitude: 09839W	Elevation: 1404 ft
*	Precipitation Period of Record:	1894/04-2010/10 ( 84%)
*	Temperature Period of Record:	1894/04-2009/01 ( 85%)

	Temperature (deg Fahrenheit)			Precipitation (inches)	Snowfall and Sleet (inches)
Monthly Averages (1971-2000)
	Daily Max	Daily Min	Daily Avg	Monthly Average	Monthly Average
January	NA	NA	NA	NA	2.5
February	NA	NA	NA	NA	3.2
March	NA	NA	NA	NA	2.1
April	NA	NA	NA	NA	.5
May	NA	NA	NA	NA	.0
June	NA	NA	NA	NA	.0
July	NA	NA	NA	NA	.0
August	NA	NA	NA	NA	.0
September	NA	NA	NA	NA	.0
October	NA	NA	NA	NA	.0
November	NA	NA	NA	NA	.9
December	NA	NA	NA	NA	2.7
Annual	NA	NA	NA	NA	11.9

	Temperature					Precipitation						Snowfall and Sleet
Average Number of Days Per Month (1971-2000)
	Max>100	Max>90	Max<32	Min<32	Min<0	any	meas	0.10"+	0.25"+	0.50"+	1.00"+	any	meas	0.50"+	1.00"+	Glazing
Jan	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	2	1	1	1	2
Feb	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	1	1	1	1	1
Mar	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	1	1	1	1	1
Apr	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	*	*	*	*	*
May	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0
Jun	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0
Jul	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0
Aug	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0
Sep	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0
Oct	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0
Nov	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	*	*	*	*	*
Dec	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	2	1	1	1	2
Ann	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	6	5	5	4	6

Month	Maximum Temperature Higher Than:	Minimum Temperature Lower Than:	Precipitation Less Than:	Precipitation Greater Than:
Exceedence Values (2 in 10 years)
January	75	-3	.16	1.44
February	82	1	.24	2.10
March	89	9	.50	2.69
April	95	25	1.19	4.07
May	101	36	1.65	6.16
June	106	49	1.84	5.54
July	110	56	1.11	3.77
August	111	52	1.24	5.02
September	105	39	1.19	4.01
October	96	26	.51	3.18
November	84	13	.10	2.66
December	75	2	.33	1.63
Annual	112	-5	22.18	32.93

	Temperature (F) (1894-2009)				Precipitation (inches) (1894-2010)		Snowfall (1894-2010)
Monthly Extremes
	Record High		Record Low		Monthly Max	Daily Max	Monthly Max	Daily Max	Greatest Depth
Jan	85	(22nd, 1943)	-15	(18th, 1930)	4.10" (1949)	1.80" ( 5th, 2005)	20.1" (1930)	14.0" ( 9th, 1930)	17.0" (16th, 1930)
Feb	93	(22nd, 1996)	-16	( 8th, 1933)	4.58" (1911)	2.33" (16th, 1911)	26.0" (1913)	13.0" (22nd, 1971)	17.0" ( 3rd, 1913)
Mar	99	(21st, 1907)	-5	(11th, 1948)	8.52" (2000)	2.52" (23rd, 2000)	37.0" (1924)	10.5" ( 5th, 1941)	12.0" (30th, 1926)
Apr	100	(14th, 1936)	16	( 2nd, 1936)	8.06" (1999)	3.07" (27th, 1938)	8.0" (1973)	8.0" ( 8th, 1973)	6.0" ( 9th, 1938)
May	107	(23rd, 1996)	25	( 1st, 1909)	11.64" (1957)	4.23" (16th, 1957)	.0" -	.0" -	.0" -
Jun	114	(25th, 1911)	41	( 2nd, 1917)	12.78" (1951)	4.36" (23rd, 1963)	.0" -	.0" -	.0" -
Jul	120	(18th, 1936)	51	( 5th, 1915)	8.28" (2010)	3.62" ( 5th, 2010)	.0" -	.0" -	.0" -
Aug	118	(12th, 1936)	45	(31st, 1915)	11.10" (1917)	6.96" (17th, 1932)	.0" -	.0" -	.0" -
Sep	115	( 3rd, 1939)	31	(23rd, 1895)	11.20" (1920)	4.84" ( 6th, 1920)	.0" -	.0" -	.0" -
Oct	103	( 2nd, 1938)	10	(30th, 1917)	9.60" (2002)	4.60" ( 3rd, 2002)	3.0" (1941)	3.0" (31st, 1941)	.1" (31st, 1941)
Nov	92	( 1st, 1950)	5	(29th, 1911)	7.70" (1909)	3.60" (13th, 1909)	24.0" (1951)	10.0" ( 1st, 1951)	10.0" ( 1st, 1951)
Dec	85	(24th, 1955)	-15	(23rd, 1989)	3.98" (1918)	2.20" (20th, 2006)	18.5" (1904)	13.0" (23rd, 1918)	15.0" (31st, 1918)
Annual	120	(Jul 18, 1936)	-16	(Feb 8, 1933)	12.78" (Jun 1951)	6.96" (Aug 17, 1932)	37.0" (Mar 1924)	14.0" (Jan 9, 1930)	17.0" (Jan 16, 1930)

Probability	24 F or Lower	28 F or Lower	32 F or Lower
First Freezing Temperature in Fall
1 Year in 10	November 2	October 25	October 10
2 Years in 10	November 4	October 27	October 19
5 Years in 10	November 17	November 6	October 27
Last Freezing Temperature in Spring
Probability	24 F or Lower	28 F or Lower	32 F or Lower
1 Year in 10	April 5	April 13	April 28
2 Years in 10	March 31	April 10	April 19
5 Years in 10	March 20	April 1	April 10

Probability	Higher Than 24 F	Higher Than 28 F	Higher Than 32 F
Number of Days in Growing Season
9 Years in 10	217	197	177
8 Years in 10	222	205	187
5 Years in 10	242	221	199
2 Years in 10	260	236	214
1 Year in 10	267	243	222

PERCENT	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	ANNUAL
Precipitation Quantiles (Inches)
MEAN	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
10%	.01	.09	.13	.68	1.10	1.18	.69	.98	.46	.18	.00	.13	20.79
20%	.16	.24	.50	1.19	1.65	1.84	1.11	1.24	1.19	.51	.10	.33	22.18
30%	.30	.45	.86	1.62	2.55	2.36	1.58	1.72	1.41	.94	.32	.43	24.57
40%	.47	.60	1.26	2.03	3.04	2.87	2.04	2.23	1.71	1.33	.60	.66	25.46
50%	.83	.92	1.60	2.33	3.58	3.59	2.61	2.79	2.14	1.67	.86	.78	26.90
60%	.96	1.22	1.88	2.68	4.30	4.20	3.03	3.34	2.80	2.01	1.41	.98	28.40
70%	1.21	1.59	2.26	3.21	5.20	4.58	3.33	4.28	3.30	2.51	1.95	1.23	30.53
80%	1.44	2.10	2.69	4.07	6.16	5.54	3.77	5.02	4.01	3.18	2.66	1.63	32.93
90%	2.27	2.50	3.95	5.10	7.20	8.00	4.85	6.87	5.13	4.58	4.11	2.52	35.50