UNIONVILLE, MD - COOP Mid-Atlantic station 189030

189030 - UNIONVILLE, Maryland

Latitude
39° 27´N

Longitude
77° 11´W

Elevation
131 meters

COOP Mid-Atlantic

10 nearest COOP Mid-Atlantic stations

8 mi	SSE :	LISBON 1 W, MD
10 mi	WSW :	FREDERICK 3 E, MD
11 mi	WSW :	FREDERICK, MD
13 mi	W :	FREDERICK, MD
13 mi	ENE :	WESTMINSTER 2 SSE, MD
13 mi	SSW :	DAMASCUS 2 SW, MD
13 mi	SSW :	DAMASCUS 2 SSW, MD
13 mi	ENE :	WESTMINSTER POL BRKS, MD
14 mi	W :	FREDERICK POLICE BRKS, MD
15 mi	W :	FREDERICK WFMD, MD

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

	Total observations	%	NDJFM observations	%
TMAX	17627	96.5%	7283	96.3%
TMIN	17580	96.3%	7237	95.7%
PRCP	17620	96.5%	7259	96.0%
SNOW	17467	95.6%	7105	93.9%

TMAX Help top of page

TMAX	observations	mean	std dev		Distribution	during extreme days of
NDJFM	7283 by year	47.0°F	12.1°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>=66°F	547	0.29	99	33	3.0*	map	table
Extreme low events Days with TMAX<=30°F	536	-0.41	75	148	2.0*	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>=66°F	547	-0.51	25	121	4.8*	map	table
Extreme low events Days with TMAX<=30°F	536	0.57	169	54	3.1*	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>=66°F	547	79	106	1.3	map	table
Extreme low events Days with TMAX<=30°F	536	66	60	1.1	map	table

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TMIN Help top of page

TMIN	observations	mean	std dev		Distribution	during extreme days of
NDJFM	7237 by year	25.5°F	11.3°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<=9°F	531	-0.25	79	122	1.5*	map	table
Extreme high events Days with TMIN>=42°F	502	0.24	85	42	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<=9°F	531	0.48	154	60	2.6*	map	table
Extreme high events Days with TMIN>=42°F	502	-0.32	38	102	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<=9°F	531	60	47	1.3	map	table
Extreme high events Days with TMIN>=42°F	502	99	76	1.3	map	table

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PRCP (total liquid water equivalent) Help top of page

PRCP	observations	mean		Distribution	during extreme days of
NDJFM	7259 by year	0.10"		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"	2226	0.34"	-0.00	356	371	1.0	map	table
Extreme events Days with PRCP>0.55"	444	1.00"	0.03	75	66	1.1	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"	2226	0.34"	-0.10	348	424	1.2*	map	table
Extreme events Days with PRCP>0.55"	444	1.00"	0.17	93	59	1.6*	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"	2226	0.34"	352	366	1.0	map	table
Extreme events Days with PRCP>0.55"	444	1.00"	80	67	1.2	map	table

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SNOW Help top of page

SNOW	observations	mean		Distribution	during extreme days of
NDJFM	7105 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"	438	2.49"	-0.27	62	102	1.6*	map	table
Extreme events Days with SNOW>4.0"	74	7.42"	-0.40	3	17	5.7*	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"	438	2.49"	0.28	113	69	1.6*	map	table
Extreme events Days with SNOW>4.0"	74	7.42"	0.41	20	9	2.2	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"	438	2.49"	47	57	1.2	map	table
Extreme events Days with SNOW>4.0"	74	7.42"	10	6	1.7	map	table

SNOW under 2 index extremes Help

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