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Weather

Washington, District of Columbia

Current conditions

Temp: 65°	Dew Point: 45°
Humidity: 48%	Wind: West 12 mph
Visibility: 10.0 miles	Pressure: 29.73 in. -
Sky: Clear

Next 12 Hours

10 am	1 pm	4 pm	7 pm	10 pm
Partly Cloudy	Partly Cloudy	Partly Cloudy	Chance of Rain	Chance of Rain
67°	72°	72°	68°	63°
Forecast data from the National Digital Forecast Database

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5-Day Forecast

Saturday

	Hi 74°
	Lo 56°

Partly Cloudy

Sunday

	Hi 72°
	Lo 49°

T-storms

Monday

	Hi 68°
	Lo 50°

Partly Cloudy

Tuesday

	Hi 68°
	Lo 56°

Chance of Rain

Wednesday

	Hi 70°
	Lo 52°

Mostly Cloudy

Local Radar

Local Satellite

Almanac

Average High: 76°

Average Low: 56°

Record high/year: 92° (1974)

Record low/year: 40° (1956)

Sunrise: 5:53 AM

Sunset: 8:16 PM

Detailed History

Forecast for District of Columbia

Updated: 9:58 am EDT on May 17, 2008

	Rest of Today Sunny through early afternoon...then increasing clouds. Highs in the mid 70s. West winds 10 to 20 mph.
	Tonight Mostly cloudy with scattered showers. Scattered thunderstorms in the evening. Lows in the upper 50s. Southwest winds 10 to 15 mph. Chance of rain 30 percent.
	Sunday Cloudy. A chance of showers in the morning...then showers likely with scattered thunderstorms in the afternoon. Highs in the lower 70s. Southwest winds 10 to 15 mph. Gusts up to 35 mph in the afternoon. Chance of rain 60 percent.
	Sunday Night Mostly cloudy in the evening...then becoming partly cloudy. Lows in the upper 40s. Northwest winds 10 to 15 mph with gusts up to 25 mph.
	Monday Mostly sunny. Highs in the upper 60s. West winds 10 to 20 mph with gusts up to 35 mph.
	Monday Night Mostly cloudy with a 30 percent chance of showers. Lows in the lower 50s.
	Tuesday Partly sunny with a 30 percent chance of showers. Highs in the upper 60s.
	Tuesday Night Mostly cloudy. Lows in the mid 50s.
	Wednesday Mostly cloudy. Highs around 70.
	Wednesday Night Mostly cloudy. Lows in the lower 50s.
	Thursday Partly sunny with a 30 percent chance of showers. Highs in the lower 70s.
	Thursday Night Partly cloudy. Lows in the mid 50s.
	Friday Mostly sunny. Highs in the lower 70s.

Sun and Moon

Sunrise:	05:53 AM (EDT)	Moon Rise:	06:21 PM (EDT)
Sunset:	08:16 PM (EDT)	Moon Set:	04:09 AM (EDT)


Moon Phase

Today	May. 19	May. 27	Jun. 03	Jun. 10

Air Pollution

Air Pollution Forecast for Washington
Current	Air Quality: Good	Pollutant: OZONE
Current	Air Quality: Good	Pollutant: PM2.5

Sat	Air Quality: Good	Pollutant: OZONE
Sat	Air Quality: Good	Pollutant: PM2.5
Sun	Air Quality: Good	Pollutant: OZONE
Sun	Air Quality: Good	Pollutant: PM2.5
Mon	Air Quality: Good	Pollutant: OZONE
Mon	Air Quality: Good	Pollutant: PM2.5

NWS Forecaster Discussion

332 fxus61 klwx 170725 afdlwx Area forecast discussion National Weather Service Baltimore Maryland/Washington District of Columbia 325 am EDT Sat may 17 2008 Synopsis...a strong cold front will drop southward from Canada on Sunday. Cool and showery weather is expected to persist through Tuesday as region remains under the influence of cold upper trough. Ridge of high pressure will try to build from the west late next week. && Near term /until 6 PM this evening/... Short wave energy rotating around Ontario closed low will swing southeastward later today triggering showers and thunderstorms over PA. These are expected to weaken significantly or dissipate as they approach the Mason Dixon line due to limited moisture and none instability over our area. Will keep a small chance for rain showers over far northwestern areas in case something manages to make it in but not confident how much activity will be around this evening. && Short term /6 PM this evening through 6 am Sunday/... A second and stronger area of short wave energy will approach the Appalachians by daybreak Sunday. There is sig 500 mb height falls indicated by the GFS in the order of 100 meters/12hr and a well- defined area of low pressure that will enhance large scale ascent across the area. Nam12 model is sig slower with this area of organized precipitation. Followed GFS bringing likely probability of precipitation to the far west by 12z sun. && Long term /Sunday through Friday/... 500mb northern hemispheric height/anomaly for the past 5 days indicates a pattern shift...with a deep central Pacific trough...western Continental U.S. Ridge...and a developing eastern Canadian trough. Water vapor loop shows an upper trough passing overhead...as a strong wave rotates around the Canadian trough...southeast into the upper Great Lakes. 03z surface map shows a cold front off the East Coast...with the next cold front moving into the upper Midwest. 21z sref indicates better than a 50 percent chance of a combined probability of 500 j/kg MUCAPE/0-6km shear>30/convective precipitation across the eastern forecast area Sunday afternoon associated with the next energetic upper level system. With 60-70kts atop the convective cloud layer...gusty showers/thunderstorms are anticipated. A second reinforcing wave may provide showers Monday night into Tuesday. HPC favored 12z European and GFS ensemble members which held onto eastern Canadian upper low longer than 12z operational GFS. The 00z GFS has come into line with this thinking...slowing the warming trend offered by the ridge aloft to the west during the later portion of the work week. && Aviation /07z Saturday through Wednesday/... VFR conditions today and tonight. Rain will overspread the area early Sun morning. Gusty showers/thunderstorms expected Sunday afternoon...followed by a cold frontal passage Sunday night. Gusty west-northwest winds expected with the frontal passage Sunday and Monday. && Marine... Winds diminishing below Small Craft Advisory in the next couple of hours over the lower Potomac and Lower Bay. Winds picking up again to Small Craft Advisory levels this afternoon from the SW and continuing through midnight Sat night. Gusty showers/thunderstorms expected Sunday afternoon have the potential to prompt special marine warnings. Even outside of precipitation...anticipate Small Craft Advisory winds with the next cold front Sunday and Monday. && Lwx watches/warnings/advisories... District of Columbia...none. Maryland...none. Virginia...none. WV...none. Marine...Small Craft Advisory from 11 am this morning to 2 am EDT Sunday for anz530-531-535-536. Small Craft Advisory until 2 am EDT Sunday for anz532>534-537. && $$ Products...Rosa/rogowski

National Weather Service Glossary of Abbreviations

Non-Expanded Version (with abbreviations)

Local Storm Report

05/15/2008 0900 am

New Orleans, Orleans Parish.

Thunderstorm wind damage, reported by Emergency Mngr.

Trees down in Uptown New Orleans