WASHINGTON DC DULLES INT'L AR, VA - COOP Mid-Atlantic station 448903

448903 - WASHINGTON DC DULLES INT'L AR, Virginia

Latitude
38° 56´N

Longitude
77° 27´W

Elevation
88 meters

COOP Mid-Atlantic

10 nearest COOP Mid-Atlantic stations

4 mi	NNW :	STERLING, VA
4 mi	SSE :	CHANTILLY, VA
4 mi	NNW :	STERLING RCS, VA
4 mi	ENE :	HERNDON, VA
6 mi	ENE :	DRANESVILLE, VA
7 mi	SE :	BACON NR FAIRFAX, VA
8 mi	SE :	MANION NR FAIRFAX, VA
10 mi	SE :	FAIRFAX, VA
11 mi	SSW :	MANASSAS 3 NW, VA
11 mi	ESE :	VIENNA, VA

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

	Total observations	%	NDJFM observations	%
TMAX	12824	70.2%	5337	70.6%
TMIN	12823	70.2%	5338	70.6%
PRCP	12724	69.7%	5264	69.6%
SNOW	12362	67.7%	5273	69.7%

TMAX Help top of page

TMAX	observations	mean	std dev		Distribution	during extreme days of
NDJFM	5337 by year	48.2°F	12.6°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>=68°F	411	0.49	98	21	4.7*	map	table
Extreme low events Days with TMAX<=30°F	362	-0.35	50	91	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>=68°F	411	-0.56	16	102	6.4*	map	table
Extreme low events Days with TMAX<=30°F	362	0.64	121	29	4.2*	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>=68°F	411	73	59	1.2	map	table
Extreme low events Days with TMAX<=30°F	362	44	33	1.3	map	table

TMAX under 2 index extremes Help

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TMIN Help top of page

TMIN	observations	mean	std dev		Distribution	during extreme days of
NDJFM	5338 by year	27.6°F	11.2°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<=11°F	377	-0.21	67	84	1.3	map	table
Extreme high events Days with TMIN>=44°F	401	0.38	78	35	2.2*	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<=11°F	377	0.48	110	39	2.8*	map	table
Extreme high events Days with TMIN>=44°F	401	-0.42	28	97	3.5*	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<=11°F	377	58	25	2.3*	map	table
Extreme high events Days with TMIN>=44°F	401	98	34	2.9*	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	5264 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"	1689	0.32"	0.13	295	232	1.3*	map	table
Extreme events Days with PRCP>0.55"	337	1.00"	0.08	57	47	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"	1689	0.32"	-0.02	283	297	1.0	map	table
Extreme events Days with PRCP>0.55"	337	1.00"	0.19	72	49	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"	1689	0.32"	326	198	1.6*	map	table
Extreme events Days with PRCP>0.55"	337	1.00"	64	42	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	5273 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"	380	2.13"	-0.25	45	83	1.8*	map	table
Extreme events Days with SNOW>3.5"	75	6.41"	-0.24	11	16	1.5	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"	380	2.13"	0.43	103	47	2.2*	map	table
Extreme events Days with SNOW>3.5"	75	6.41"	0.63	23	8	2.9*	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"	380	2.13"	55	37	1.5	map	table
Extreme events Days with SNOW>3.5"	75	6.41"	14	7	2.0	map	table

SNOW under 2 index extremes Help

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