OK11 Coop Summary

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Cooperative Observer Station Summary

BROKEN BOW DAM (341168)
*	MCCURTAIN County	Climate Division: 9
*	Latitude: 3408N; Longitude: 09442W	Elevation: 442 ft
*	Precipitation Period of Record:	1964/09-1997/07 ( 99%)
*	Temperature Period of Record:	1964/09-1997/07 ( 95%)

	Temperature (deg Fahrenheit)			Precipitation (inches)	Snowfall and Sleet (inches)
Monthly Averages (1971-2000)
	Daily Max	Daily Min	Daily Avg	Monthly Average	Monthly Average
January	51.9	27.6	39.5	NA	.0
February	57.7	31.2	44.2	3.52	NA
March	66.3	39.1	52.5	5.09	.0
April	74.5	NA	NA	4.65	.0
May	NA	NA	NA	NA	.0
June	88.9	64.2	76.3	4.51	.0
July	93.6	67.7	80.4	4.53	.0
August	NA	NA	NA	NA	.0
September	NA	NA	NA	NA	.0
October	NA	NA	NA	NA	.0
November	NA	NA	NA	NA	.0
December	NA	NA	NA	NA	.0
Annual	NA	NA	NA	NA	.1

	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	0	0	1	23	0	NA	NA	NA	NA	NA	NA	*	*	*	0	*
Feb	0	0	1	16	*	8	7	6	4	2	1	NA	NA	NA	NA	NA
Mar	0	0	*	8	0	9	8	6	5	3	2	0	0	0	0	0
Apr	0	1	0	NA	NA	9	8	6	5	3	1	0	0	0	0	0
May	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	0
Jun	*	15	0	0	0	9	7	6	5	3	2	0	0	0	0	0
Jul	4	25	0	0	0	7	6	5	4	3	1	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	0	0	0	0	0
Dec	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	*	0	0	0	*
Ann	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	*	*	*	*	*

Month	Maximum Temperature Higher Than:	Minimum Temperature Lower Than:	Precipitation Less Than:	Precipitation Greater Than:
Exceedence Values (2 in 10 years)
January	76	7	1.73	5.07
February	81	13	2.01	5.48
March	85	20	2.68	7.87
April	90	29	2.75	7.75
May	92	41	4.32	9.88
June	99	50	2.54	6.30
July	104	58	1.83	6.99
August	103	56	1.29	4.96
September	101	41	2.36	7.69
October	92	31	1.29	8.00
November	82	20	2.08	8.29
December	76	11	2.37	7.73
Annual	106	4	44.52	65.87

	Temperature (F) (1964-1997)				Precipitation (inches) (1964-1997)		Snowfall (1964-1997)
Monthly Extremes
	Record High		Record Low		Monthly Max	Daily Max	Monthly Max	Daily Max	Greatest Depth
Jan	78	( 9th, 1969)	1	(31st, 1966)	8.51" (1990)	5.00" (30th, 1969)	7.8" (1966)	2.7" (20th, 1966)	.1" ( 8th, 1997)
Feb	89	(22nd, 1996)	0	( 3rd, 1996)	8.23" (1997)	3.54" (12th, 1992)	5.0" (1966)	5.0" (23rd, 1966)	5.0" (23rd, 1966)
Mar	89	(24th, 1995)	8	( 9th, 1996)	10.34" (1973)	3.63" (30th, 1979)	.0" (1970)	.0" (21st, 1970)	.0" -
Apr	95	(19th, 1987)	24	( 3rd, 1987)	11.77" (1991)	3.94" (12th, 1991)	.0" -	.0" -	.0" -
May	95	(21st, 1989)	34	( 1st, 1996)	13.53" (1968)	3.57" ( 3rd, 1975)	.0" -	.0" -	.0" -
Jun	102	(24th, 1984)	46	( 3rd, 1970)	10.95" (1973)	2.95" ( 2nd, 1973)	.0" -	.0" -	.0" -
Jul	107	(30th, 1986)	54	(15th, 1990)	12.26" (1996)	7.05" ( 2nd, 1983)	.0" -	.0" -	.0" -
Aug	108	( 1st, 1986)	50	(14th, 1967)	7.77" (1966)	4.98" (20th, 1970)	.0" -	.0" -	.0" -
Sep	108	( 2nd, 1985)	36	(29th, 1967)	13.79" (1980)	8.16" (28th, 1980)	.0" -	.0" -	.0" -
Oct	95	( 2nd, 1977)	25	(19th, 1989)	14.91" (1993)	5.35" (20th, 1993)	.0" -	.0" -	.0" -
Nov	87	( 6th, 1989)	11	(29th, 1976)	10.81" (1978)	5.80" (16th, 1978)	.0" -	.0" -	.0" -
Dec	79	(15th, 1995)	2	(25th, 1983)	15.21" (1971)	8.25" (10th, 1971)	1.5" (1967)	1.5" (28th, 1967)	.1" (23rd, 1990)
Annual	108	(Aug 1, 1986)	0	(Feb 3, 1996)	15.21" (Dec 1971)	8.25" (Dec 10, 1971)	7.8" (Jan 1966)	5.0" (Feb 23, 1966)	5.0" (Feb 23, 1966)

Probability	24 F or Lower	28 F or Lower	32 F or Lower
First Freezing Temperature in Fall
1 Year in 10	November 13	November 2	October 20
2 Years in 10	November 16	November 5	October 24
5 Years in 10	November 28	November 15	November 6
Last Freezing Temperature in Spring
Probability	24 F or Lower	28 F or Lower	32 F or Lower
1 Year in 10	March 22	April 8	April 15
2 Years in 10	March 19	April 4	April 11
5 Years in 10	March 5	March 19	April 5

Probability	Higher Than 24 F	Higher Than 28 F	Higher Than 32 F
Number of Days in Growing Season
9 Years in 10	249	220	194
8 Years in 10	250	232	204
5 Years in 10	263	242	219
2 Years in 10	286	255	235
1 Year in 10	291	268	245

PERCENT	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	ANNUAL
Precipitation Quantiles (Inches)
MEAN	NA	3.52	5.09	4.65	NA	4.51	4.53	NA	NA	NA	NA	NA	NA
10%	.90	1.51	2.21	2.24	3.07	2.16	1.27	1.07	1.77	.95	1.72	2.27	43.37
20%	1.73	2.01	2.68	2.75	4.32	2.54	1.83	1.29	2.36	1.29	2.08	2.37	44.52
30%	2.14	2.75	3.32	3.03	5.17	2.90	2.14	1.43	2.71	2.73	2.66	2.75	46.92
40%	2.67	3.40	4.18	4.02	6.15	3.67	2.60	2.02	3.68	4.08	4.10	3.50	49.72
50%	3.18	3.76	4.91	4.79	6.87	4.18	3.22	2.36	4.74	4.88	4.91	4.34	53.21
60%	3.85	4.03	5.27	4.88	7.53	4.45	4.72	3.24	5.07	5.32	5.50	5.00	56.87
70%	3.97	4.66	6.36	5.94	9.15	5.68	5.82	3.67	6.70	6.25	7.03	5.72	60.54
80%	5.07	5.48	7.87	7.75	9.88	6.30	6.99	4.96	7.69	8.00	8.29	7.73	65.87
90%	6.48	5.80	9.18	9.95	12.81	8.03	10.01	6.63	8.09	13.78	8.90	9.07	72.27