SAINT HELENA, CA - COOP Southwest station 047643

047643 - SAINT HELENA, California

Latitude
38° 30´N

Longitude
122° 28´W

Elevation
69 meters

10 nearest COOP Southwest stations

2 mi	W :	SAINT HELENA 4 WSW, CA
3 mi	SE :	OAKVILLE 1 WNW, CA
3 mi	NNE :	ANGWIN PAC UNION COL, CA
3 mi	NE :	SAINT HELENA 6 NE, CA
5 mi	NW :	CALISTOGA, CA
5 mi	S :	OAKVILLE 4 SW, CA
8 mi	SE :	NAPA RIVER TELEMETERI, CA
8 mi	ESE :	ATLAS ROAD, CA
8 mi	ENE :	BERRYESSA LAKE, CA
8 mi	NW :	KNIGHTS VALLEY, CA

Weather variables Help
Click a weather variable name to jump down to those statistics.

	Total observations	%	NDJFM observations	%
TMAX	16885	92.5%	7044	93.1%
TMIN	16888	92.5%	7044	93.1%
PRCP	16851	92.3%	7041	93.1%
SNOW	16688	91.4%	6931	91.6%

TMAX Help top of page

TMAX	observations	mean	std dev		Distribution	during extreme days of
NDJFM	7044 by year	61.3°F	8.3°F		overall	NAM	PNA	CTI

TMAX and NAM Help scatterplot	days by month	mean NAM index	extreme high NAM days	extreme low NAM days	ratio of extreme high:low NAM days
Extreme high events Days with TMAX>=75°F	531	0.04	64	66	1.0	map	table
Extreme low events Days with TMAX<=50°F	565	0.02	114	104	1.1	map	table

TMAX and PNA Help scatterplot	days by month	mean PNA index	extreme high PNA days	extreme low PNA days	ratio of extreme high:low PNA days
Extreme high events Days with TMAX>=75°F	531	0.37	109	37	2.9*	map	table
Extreme low events Days with TMAX<=50°F	565	-0.70	59	221	3.7*	map	table

TMAX and CTI Help	days by month	high CTI days (moderate to strong El Niño winters)	low CTI days (moderate to strong La Niña winters)	ratio of high:low CTI (El Niño:La Niña days)
Extreme high events Days with TMAX>=75°F	531	57	78	1.4	map	table
Extreme low events Days with TMAX<=50°F	565	98	129	1.3	map	table

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TMIN Help top of page

TMIN	observations	mean	std dev		Distribution	during extreme days of
NDJFM	7044 by year	38.5°F	7.2°F		overall	NAM	PNA	CTI

TMIN and NAM Help scatterplot	days by month	mean NAM index	extreme high NAM days	extreme low NAM days	ratio of extreme high:low NAM days
Extreme low events Days with TMIN<=28°F	512	0.09	110	82	1.3	map	table
Extreme high events Days with TMIN>=50°F	529	-0.24	55	111	2.0*	map	table

TMIN and PNA Help scatterplot	days by month	mean PNA index	extreme high PNA days	extreme low PNA days	ratio of extreme high:low PNA days
Extreme low events Days with TMIN<=28°F	512	-0.86	37	206	5.6*	map	table
Extreme high events Days with TMIN>=50°F	529	0.33	106	39	2.7*	map	table

TMIN and CTI Help	days by month	high CTI days (moderate to strong El Niño winters)	low CTI days (moderate to strong La Niña winters)	ratio of high:low CTI (El Niño:La Niña days)
Extreme low events Days with TMIN<=28°F	512	69	102	1.5*	map	table
Extreme high events Days with TMIN>=50°F	529	86	100	1.2	map	table

TMIN under 2 index extremes Help

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PRCP (total liquid water equivalent) Help top of page

PRCP	observations	mean		Distribution	during extreme days of
NDJFM	7041 by year	0.20"		overall	NAM	PNA	CTI

PRCP and NAM Help scatterplot	days by month	mean	mean NAM index	extreme high NAM days	extreme low NAM days	ratio of extreme high:low NAM days
Observed events Days with PRCP>0.00"	2363	0.59"	-0.07	383	428	1.1	map	table
Extreme events Days with PRCP>1.00"	465	1.84"	-0.17	70	104	1.5*	map	table

PRCP and PNA Help scatterplot	days by month	mean	mean PNA index	extreme high PNA days	extreme low PNA days	ratio of extreme high:low PNA days
Observed events Days with PRCP>0.00"	2363	0.59"	-0.14	349	498	1.4*	map	table
Extreme events Days with PRCP>1.00"	465	1.84"	-0.21	66	112	1.7*	map	table

PRCP and CTI Help	days by month	mean	high CTI days (moderate to strong El Niño winters)	low CTI days (moderate to strong La Niña winters)	ratio of high:low CTI (El Niño:La Niña days)
Observed events Days with PRCP>0.00"	2363	0.59"	490	415	1.2*	map	table
Extreme events Days with PRCP>1.00"	465	1.84"	106	73	1.5*	map	table

PRCP under 2 index extremes Help

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SNOW Help top of page

SNOW	observations	mean		Distribution	during extreme days of
NDJFM	6931 by year	0.00"		overall	NAM	PNA	CTI

SNOW and NAM Help scatterplot	days by month	mean	mean NAM index	extreme high NAM days	extreme low NAM days	ratio of extreme high:low NAM days
Observed events Days with SNOW>0.0"	7	1.84"	0.92	2	0	Inf	map	table
Extreme events Days with SNOW>3.0"	1	4.00"	1.33	1	0	Inf	map	table

SNOW and PNA Help scatterplot	days by month	mean	mean PNA index	extreme high PNA days	extreme low PNA days	ratio of extreme high:low PNA days
Observed events Days with SNOW>0.0"	7	1.84"	-1.12	0	3	Inf	map	table
Extreme events Days with SNOW>3.0"	1	4.00"	-2.20	0	1	Inf	map	table

SNOW and CTI Help	days by month	mean	high CTI days (moderate to strong El Niño winters)	low CTI days (moderate to strong La Niña winters)	ratio of high:low CTI (El Niño:La Niña days)
Observed events Days with SNOW>0.0"	7	1.84"	1	3	3.0	map	table
Extreme events Days with SNOW>3.0"	1	4.00"	0	1	Inf	map	table

SNOW under 2 index extremes Help

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