ALEXANDRIA POTOMAC YARDS, VA - COOP Mid-Atlantic station 440097

440097 - ALEXANDRIA POTOMAC YARDS, Virginia

Latitude
38° 49´N

Longitude
77° 3´W

Elevation
6 meters

COOP Mid-Atlantic

10 nearest COOP Mid-Atlantic stations

2 mi	WSW :	ALEXANDRIA CITY GARAGE, VA
3 mi	W :	EPISCOPAL HIGH SCHOOL, VA
4 mi	NNE :	WASHINGTON DC NATIONAL ARPT, VA
4 mi	NW :	BARCROFT, VA
4 mi	SW :	GROVETON, VA
5 mi	WNW :	BAILEYS CROSSROADS, VA
6 mi	ENE :	SILVER HILL OBSV, MD
6 mi	N :	WASHNGTN DC WB CITY, MD
6 mi	NW :	WAVERLY HILLS, VA
6 mi	NNW :	CLARENDON LYON PARK, VA

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

	Total observations	%	NDJFM observations	%
TMAX	4838	26.5%	1874	24.8%
TMIN	4833	26.5%	1874	24.8%
PRCP	4917	26.9%	1897	25.1%
SNOW	4889	26.8%	1863	24.6%

TMAX Help top of page

TMAX	observations	mean	std dev		Distribution	during extreme days of
NDJFM	1874 by year	52.0°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>=71°F	133	-0.04	12	14	1.2	map	table
Extreme low events Days with TMAX<=35°F	138	-0.28	23	33	1.4	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>=71°F	133	-0.51	7	25	3.6*	map	table
Extreme low events Days with TMAX<=35°F	138	0.56	41	15	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>=71°F	133	1	50	50.0*	map	table
Extreme low events Days with TMAX<=35°F	138	18	29	1.6	map	table

TMAX under 2 index extremes Help

Maps - choose one extreme:

TMIN Help top of page

TMIN	observations	mean	std dev		Distribution	during extreme days of
NDJFM	1874 by year	33.1°F	9.5°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<=19°F	143	-0.16	22	29	1.3	map	table
Extreme high events Days with TMIN>=48°F	133	-0.03	17	15	1.1	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<=19°F	143	0.60	43	16	2.7*	map	table
Extreme high events Days with TMIN>=48°F	133	-0.23	11	18	1.6	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<=19°F	143	18	27	1.5	map	table
Extreme high events Days with TMIN>=48°F	133	9	34	3.8*	map	table

TMIN under 2 index extremes Help

Maps - choose one extreme:

PRCP (total liquid water equivalent) Help top of page

PRCP	observations	mean		Distribution	during extreme days of
NDJFM	1897 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"	573	0.32"	-0.10	86	114	1.3	map	table
Extreme events Days with PRCP>0.53"	114	0.93"	-0.07	18	26	1.4	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"	573	0.32"	-0.23	74	118	1.6*	map	table
Extreme events Days with PRCP>0.53"	114	0.93"	0.06	18	12	1.5	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"	573	0.32"	47	149	3.2*	map	table
Extreme events Days with PRCP>0.53"	114	0.93"	14	15	1.1	map	table

PRCP under 2 index extremes Help

Maps - choose one extreme:

SNOW Help top of page

SNOW	observations	mean		Distribution	during extreme days of
NDJFM	1863 by year	0.07"		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"	49	2.62"	-0.15	9	11	1.2	map	table
Extreme events Days with SNOW>4.2"	9	6.53"	-0.50	0	3	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"	49	2.62"	0.22	10	7	1.4	map	table
Extreme events Days with SNOW>4.2"	9	6.53"	0.96	4	1	4.0	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"	49	2.62"	7	9	1.3	map	table
Extreme events Days with SNOW>4.2"	9	6.53"	4	0	Inf	map	table

SNOW under 2 index extremes Help

Maps - choose one extreme: