WEST CHESTER 1 W, PA - COOP Northeast station 369464

369464 - WEST CHESTER 1 W, Pennsylvania

Latitude
39° 58´N

Longitude
75° 38´W

Elevation
137 meters

10 nearest COOP Northeast stations

2 mi	W :	WEST CHESTER 2 W, PA
7 mi	SSE :	CHADDS FORD, PA
9 mi	NNE :	DEVAULT 1 W, PA
10 mi	W :	COATESVILLE, PA
10 mi	NW :	GLENMOORE, PA
11 mi	W :	COATESVILLE 1 SW, PA
11 mi	NW :	LYNDELL 2 NW, PA
12 mi	W :	COATESVILLE 2 W, PA
13 mi	NE :	PHOENIXVILLE 1 E, PA
13 mi	NW :	HONEY BROOK 1 S, PA

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

	Total observations	%	NDJFM observations	%
TMAX	15135	82.9%	6052	80.0%
TMIN	15265	83.6%	6200	82.0%
PRCP	15289	83.7%	6174	81.6%
SNOW	14251	78.0%	5049	66.8%

TMAX Help top of page

TMAX	observations	mean	std dev		Distribution	during extreme days of
NDJFM	6052 by year	45.8°F	11.9°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>=64°F	476	0.20	76	39	1.9*	map	table
Extreme low events Days with TMAX<=29°F	470	-0.34	72	129	1.8*	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>=64°F	476	-0.34	27	83	3.1*	map	table
Extreme low events Days with TMAX<=29°F	470	0.46	131	48	2.7*	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>=64°F	476	57	105	1.8*	map	table
Extreme low events Days with TMAX<=29°F	470	44	74	1.7*	map	table

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TMIN Help top of page

TMIN	observations	mean	std dev		Distribution	during extreme days of
NDJFM	6200 by year	26.9°F	10.7°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<=10°F	447	-0.32	61	108	1.8*	map	table
Extreme high events Days with TMIN>=42°F	462	0.17	71	42	1.7*	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<=10°F	447	0.57	136	47	2.9*	map	table
Extreme high events Days with TMIN>=42°F	462	-0.20	38	75	2.0*	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<=10°F	447	49	48	1.0	map	table
Extreme high events Days with TMIN>=42°F	462	58	91	1.6*	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	6174 by year	0.12"		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"	2037	0.36"	-0.06	300	358	1.2*	map	table
Extreme events Days with PRCP>0.61"	406	1.10"	-0.08	53	64	1.2	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"	2037	0.36"	-0.09	311	366	1.2*	map	table
Extreme events Days with PRCP>0.61"	406	1.10"	0.25	86	40	2.1*	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"	2037	0.36"	293	390	1.3*	map	table
Extreme events Days with PRCP>0.61"	406	1.10"	76	77	1.0	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	5049 by year	0.15"		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"	301	2.56"	-0.22	51	78	1.5	map	table
Extreme events Days with SNOW>3.5"	59	7.71"	-0.43	5	18	3.6*	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"	301	2.56"	0.27	72	39	1.8*	map	table
Extreme events Days with SNOW>3.5"	59	7.71"	0.69	19	2	9.5*	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"	301	2.56"	34	40	1.2	map	table
Extreme events Days with SNOW>3.5"	59	7.71"	14	5	2.8	map	table

SNOW under 2 index extremes Help

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