Sterling, VA

9:59 AM EDT on May 21, 2013 (GMT -0400)
Elev: 315 ft
Lon: 77.4° W
Lat: 39.0° N
Source
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News
In Tornado's Wake, Worried Parents Seek Out Kids
May 21, 2013
A desperate search was underway by parents looking to find children after the massive tornado.
Moore Already at Work on Recovery, Says Mayor
May 21, 2013
Glenn Lewis was the mayor of Moore, Okla., when the strongest tornado on record whipped the city in 1999, and he says the most recent storm won't deter the community from rebuilding.
Moore Survivor Finds Dog Buried Alive
May 21, 2013
Tornado survivor is interrupted in the middle of interview by little dog digging out of rubble
A Timeline of Deadly Events in Moore, Okla.
May 21, 2013
Check out this comprehensive timeline of the events that transpired in Moore, Okla.
Oklahoma Tornado: How to Help
May 21, 2013
There are several agencies asking for donations to help those hit hard by the Oklahoma tornadoes.
Recovery Efforts Continue in Deadly Okla. Tornado
May 21, 2013
The search and rescue efforts are ongoing in Moore, Okla. after a massive tornado levelled the town and local schools.
At Least 20 Children Dead at Okla. School
May 21, 2013
More than a dozen children perished in the devastating Moore, Okla. tornado.
Twitter Responds With Prayers for Oklahoma Tornado Victims
May 21, 2013
Twitter responds to the devastation brought by tornadoes Monday in suburban Oklahoma City, offering condolences and prayers for the victims and survivors.
In Their Words: The Oklahoma Tornado Tragedy
May 21, 2013
Our reporters were among the first national media to report from Moore, Okla. shortly after a powerful tornado decimated the town. These are their thoughts as they report from the scene.
'I Expected Chaos:' Scenes from Okla. School
May 21, 2013
A photographer who was among the first to arrive at an Oklahoma Elementary School after a tornado destroyed it, describes the heart-wrenching scene.
Tornado Took Similar Path to 1999 F5
May 21, 2013
Moore, Oklahoma is no stranger to devastating tornadoes.
Obama Declares Major Disaster in Oklahoma
May 21, 2013
President Barack Obama has declared a major disaster in Oklahoma as the state recovers from a massive tornado that ripped through the Oklahoma City suburbs Monday, killing dozens and flattening entire neighborhoods.
Photos, Social Media Capture Terror of Okla. Tornadoes
May 20, 2013
Catastrophic tornadoes developed in Oklahoma on Monday. Here are photos and social media reports.
Huge Rock Crashes Into Moon, Sparks Giant Explosion
May 20, 2013
The moon has a new hole on its surface thanks to a boulder that slammed into it in March, creating the biggest explosion scientists have seen on the moon since they started monitoring it.
Deadly Rainstorms Kill 55 in Southern China
May 20, 2013
Chinese authorities say rainstorms that battered southern China this week have killed 55 people and left 14 others missing.
Photos: Deadly Tornado Outbreak Strikes Plains
May 20, 2013
A tornado outbreak struck the Plains states on May 19, 2013, leaving widespread damage in its wake.
Recap: Tornadoes Rake Oklahoma, Kansas, Iowa
May 20, 2013
The weather imagery, video and recap from tornadoes in the Plains on May 19, 2013.
Amazing Nature, Captured
May 20, 2013
These stunning images of nature captured across the globe will change the way you view our world.
Photos: Tornado Devastation in Plains
May 20, 2013
Photos and social media reports of severe weather damage over the weekend in Oklahoma, Iowa and Kansas.
Tornado Hits South of Oklahoma City
May 20, 2013
Continuing coverage of destructive severe weather.
More News Articles
Weather Summary
Kari Kiefer
Weather Underground Forecast for Tuesday, May 21, 2013.

After a devastating severe weather day in the Plains on Monday, severe weather is expected to fire up again across the nation's mid-section again on Tuesday.

The nearly stationary low over the Northern Plains will gradually weaken as it shifts eastward into the Midwest on Tuesday, while the system's associated cold front trails southwestward from the low across the Mid-Mississippi Valley through the Southern Plains. Favorable energy and conditions ahead of the cold front combined with the moisture laden conditions of the nation's mid-section will set the stage for multiple clusters of thunderstorms to develop from the Midwest into the Ozarks and the Southern Plains. Portions of northeastern Texas, extreme southeastern Oklahoma, central and southern Arkansas, and northwestern Louisiana are at moderate risk of severe thunderstorm activity as environmental conditions remain favorable for tornadoes, damaging wind gusts, and very large hail. Areas surrounding this moderate risk region from the parts of central and eastern Texas into the Upper Great Lakes are at slight risk of severe thunderstorm development with hail, damaging wind gusts, and isolated tornadoes.

Meanwhile, areas of heavy rain and widely scattered showers will continue near the low in the Northern Plains and Upper Mississippi Valley and near and to the north of a nearly stationary frontal boundary extending out ahead of the system from the Great Lakes into the Northeast. Continued precipitation in already saturated areas of the Northern Plains and Upper Midwest will maintain flood concerns from parts of North Dakota into northern Wisconsin.

Elsewhere, scattered showers and thunderstorms are expected to persist in the Mid-Atlantic and southeastern corner of the nation.
Weather Underground Forecast for Tuesday, May 21, 2013.

After a devastating severe weather day in the Plains on Monday, severe weather is expected to fire up again across the nation's mid-section again on Tuesday.

The nearly stationary low over the Northern Plains will gradually weaken as it shifts eastward into the Midwest on Tuesday, while the system's associated cold front trails southwestward from the low across the Mid-Mississippi Valley through the Southern Plains. Favorable energy and conditions ahead of the cold front combined with the moisture laden conditions of the nation's mid-section will set the stage for multiple clusters of thunderstorms to develop from the Midwest into the Ozarks and the Southern Plains. Portions of northeastern Texas, extreme southeastern Oklahoma, central and southern Arkansas, and northwestern Louisiana are at moderate risk of severe thunderstorm activity as environmental conditions remain favorable for tornadoes, damaging wind gusts, and very large hail. Areas surrounding this moderate risk region from the parts of central and eastern Texas into the Upper Great Lakes are at slight risk of severe thunderstorm development with hail, damaging wind gusts, and isolated tornadoes.

Meanwhile, areas of heavy rain and widely scattered showers will continue near the low in the Northern Plains and Upper Mississippi Valley and near and to the north of a nearly stationary frontal boundary extending out ahead of the system from the Great Lakes into the Northeast. Continued precipitation in already saturated areas of the Northern Plains and Upper Midwest will maintain flood concerns from parts of North Dakota into northern Wisconsin.

Elsewhere, scattered showers and thunderstorms are expected to persist in the Mid-Atlantic and southeastern corner of the nation.
More News Articles

Sterling Weather at a Glance

Updated 9:14 AM EDT
Elevation
339 ft
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Now
Haze
Haze
Temperature
69 °F
Feels Like 69 °F
Wind(mph)
6
Sunrise / Set
5:52 AM
8:21 PM
Moon
Waxing Gibbous
Today
Thunderstorm 88 °F
Thunderstorm
20% chance of precipitation
Tonight
Partly Cloudy 68 °F
Partly Cloudy
20% chance of precipitation
Tomorrow
Chance of a Thunderstorm 88 | 68 °F
Chance of T-storms
30% chance of precipitation
Thursday
Chance of a Thunderstorm 79 | 52 °F
Chance of T-storms
50% chance of precipitation
Friday
Partly Cloudy 66 | 50 °F
Partly Cloudy
Saturday
Partly Cloudy 72 | 48 °F
Partly Cloudy
Today is forecast to be Warmer than yesterday.
Conditions
Pressure
30.00 in
Visibility
6.0 miles
Clouds
Mostly Cloudy 900 ft
Overcast 1400 ft
Moisture
Humidity
86%
Rainfall
0.01 in
Snow Depth
Not available.
METAR
METAR KIAD 211352Z 19007KT 6SM HZ BKN009 OVC014 22/19 A3000 RMK AO2 SLP157 T02170189
Don't speak METAR? Read our FAQ.
Weather Radio
Launch Weather Radio
Temperature
Temperature
69 °F
69,68,68,68,67,66,67,68,68,68,69,70,70
Dew Point
65 °F
Wind
Speed / Dir
6 mph from SSW
Wind Gust
8.0 mph
Health
UV
2 out of 16
Pollen
8.10 out of 12
Pollen Forecast
Ozone
Good
PM2.5
Good
Flu Activity
Sporadic
View Flu Map
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Source: BestForecast
Descriptive Forecast
Tuesday
partlycloudy Partly cloudy with thunderstorms and rain showers in the afternoon. Fog early. High of 88F. Winds from the SSW at 5 to 10 mph. Chance of rain 20%.
Tuesday Night
nt_partlycloudy Partly cloudy with thunderstorms and rain showers. Fog overnight. Low of 68F. Winds from the SSW at 5 to 10 mph. Chance of rain 20%.
Wednesday
chancetstorms Partly cloudy with a chance of a thunderstorm and a chance of rain in the afternoon. Fog early. High of 88F. Winds from the SSW at 5 to 20 mph. Chance of rain 30%.
Wednesday Night
nt_chancetstorms Overcast with a chance of a thunderstorm and a chance of rain. Low of 68F. Winds from the WNW at 10 to 15 mph shifting to the South after midnight. Chance of rain 40%.
Thursday
chancetstorms Mostly cloudy with a chance of a thunderstorm and a chance of rain. High of 79F. Winds from the South at 10 to 15 mph. Chance of rain 50%.
Thursday Night
nt_chancetstorms Overcast with a chance of a thunderstorm and rain in the evening, then partly cloudy. Fog overnight. Low of 52F. Winds from the SW at 5 to 10 mph shifting to the WNW after midnight. Chance of rain 30%.
Friday
partlycloudy Overcast in the morning, then partly cloudy. Fog early. High of 66F. Breezy. Winds from the WNW at 10 to 20 mph.
Friday Night
nt_partlycloudy Partly cloudy. Low of 50F. Breezy. Winds from the NW at 15 to 20 mph.
Saturday
partlycloudy Clear in the morning, then mostly cloudy. High of 72F. Breezy. Winds from the NNW at 15 to 20 mph.
Saturday Night
nt_mostlycloudy Overcast. Low of 48F. Winds from the NW at 5 to 15 mph.
Sunday
partlycloudy Partly cloudy. High of 72F. Winds from the NW at 5 to 10 mph.
Sunday Night
nt_partlycloudy Partly cloudy. Low of 50F. Winds less than 5 mph.
Monday
partlycloudy Clear. High of 73F. Winds less than 5 mph.
Monday Night
nt_partlycloudy Partly cloudy. Low of 50F. Winds less than 5 mph.
Tuesday
chancerain Partly cloudy with a chance of rain. High of 75F. Winds from the SSE at 5 to 10 mph. Chance of rain 40%.
Tuesday Night
nt_partlycloudy Partly cloudy. Fog overnight. Low of 61F. Winds from the SSE at 5 to 10 mph.
Wednesday
partlycloudy Partly cloudy. High of 81F. Winds less than 5 mph.
Wednesday Night
nt_partlycloudy Partly cloudy. Low of 64F. Winds less than 5 mph.
Thursday
partlycloudy Partly cloudy. High of 84F. Winds less than 5 mph.
Thursday Night
nt_partlycloudy Partly cloudy. Low of 66F. Winds less than 5 mph.
Friday
partlycloudy Partly cloudy. High of 86F. Winds less than 5 mph.
Friday Night
nt_partlycloudy Clear. Low of 66F. Winds less than 5 mph.
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Weather Forecast for Sterling VA

View Calendar 10-Day Forecast for station KVAASHBU18

Tuesday, 21
Thunderstorm
88 | 68 °F
Thunderstorm
Chance of
Precipitation
20%
Wednesday, 22
Chance of a Thunderstorm
88 | 68 °F
Chance of T-storms
Chance of
Precipitation
30%
Thursday, 23
Chance of a Thunderstorm
79 | 52 °F
Chance of T-storms
Chance of
Precipitation
50%
Friday, 24
Partly Cloudy
66 | 50 °F
Partly Cloudy
Chance of
Precipitation
0%
Saturday, 25
Partly Cloudy
72 | 48 °F
Partly Cloudy
Chance of
Precipitation
0%
Sunday, 26
Partly Cloudy
72 | 50 °F
Partly Cloudy
Chance of
Precipitation
0%
Monday, 27
Partly Cloudy
73 | 50 °F
Partly Cloudy
Chance of
Precipitation
0%
Tuesday, 28
Chance of Rain
75 | 61 °F
Chance of Rain
Chance of
Precipitation
40%
Wednesday, 29
Partly Cloudy
81 | 64 °F
Partly Cloudy
Chance of
Precipitation
0%
Thursday, 30
Partly Cloudy
84 | 66 °F
Partly Cloudy
Chance of
Precipitation
0%
Source: BestForecast at 9:39 AM EDT on May 21, 2013
Descriptive Forecast
Tuesday
partlycloudy Partly cloudy with thunderstorms and rain showers in the afternoon. Fog early. High of 88F. Winds from the SSW at 5 to 10 mph. Chance of rain 20%.
Tuesday Night
nt_partlycloudy Partly cloudy with thunderstorms and rain showers. Fog overnight. Low of 68F. Winds from the SSW at 5 to 10 mph. Chance of rain 20%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 66 | 65 83 | 69 85 | 68 72 | 66
Wind 2 mph South 5 mph SSW 9 mph South 6 mph SSW
Humidity 95% 62% 57% 83%
Chance of Precip. 10% 10% 20% 20%
Cloud Cover 64% 48% 54% 54%
Conditions Fog Partly Cloudy Thunderstorm Thunderstorm
Sunrise & Sunset
5:52 AM
8:21 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [1.96], Average RMSE [2.35]
The National Weather Service forecast quality is good. MaxT RMSE [1.82], Average RMSE [1.75] : Use NWS
Source: BestForecast at 9:39 AM EDT on May 21, 2013
Descriptive Forecast
Wednesday
chancetstorms Partly cloudy with a chance of a thunderstorm and a chance of rain in the afternoon. Fog early. High of 88F. Winds from the SSW at 5 to 20 mph. Chance of rain 30%.
Wednesday Night
nt_chancetstorms Overcast with a chance of a thunderstorm and a chance of rain. Low of 68F. Winds from the WNW at 10 to 15 mph shifting to the South after midnight. Chance of rain 40%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 71 | 65 83 | 70 82 | 70 76 | 67
Wind 5 mph SSW 8 mph SSW 16 mph South 6 mph NNE
Humidity 83% 63% 64% 73%
Chance of Precip. 10% 10% 30% 40%
Cloud Cover 49% 48% 69% 100%
Conditions Fog Partly Cloudy Chance of a Thunderstorm Chance of a Thunderstorm
Sunrise & Sunset
5:51 AM
8:22 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [2.30], Average RMSE [2.35]
The National Weather Service forecast quality is good. MaxT RMSE [2.42], Average RMSE [2.03] : Use NWS
Source: BestForecast at 9:39 AM EDT on May 21, 2013
Descriptive Forecast
Thursday
chancetstorms Mostly cloudy with a chance of a thunderstorm and a chance of rain. High of 79F. Winds from the South at 10 to 15 mph. Chance of rain 50%.
Thursday Night
nt_chancetstorms Overcast with a chance of a thunderstorm and rain in the evening, then partly cloudy. Fog overnight. Low of 52F. Winds from the SW at 5 to 10 mph shifting to the WNW after midnight. Chance of rain 30%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 73 | 64 76 | 64 78 | 63 67 | 63
Wind 11 mph South 13 mph SSW 10 mph South 6 mph SW
Humidity 75% 66% 60% 86%
Chance of Precip. 40% 50% 50% 30%
Cloud Cover 100% 84% 87% 100%
Conditions Chance of a Thunderstorm Chance of a Thunderstorm Chance of a Thunderstorm Chance of a Thunderstorm
Sunrise & Sunset
5:50 AM
8:22 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [2.50], Average RMSE [2.12]
The National Weather Service forecast quality is fair. MaxT RMSE [2.63], Average RMSE [2.56] : Use NWS
Source: BestForecast at 9:39 AM EDT on May 21, 2013
Descriptive Forecast
Friday
partlycloudy Overcast in the morning, then partly cloudy. Fog early. High of 66F. Breezy. Winds from the WNW at 10 to 20 mph.
Friday Night
nt_partlycloudy Partly cloudy. Low of 50F. Breezy. Winds from the NW at 15 to 20 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 58 | 55 65 | 53 65 | 48 57 | 44
Wind 7 mph WNW 15 mph WNW 17 mph NW 14 mph NW
Humidity 89% 67% 54% 58%
Chance of Precip. 10% 10% 0% 10%
Cloud Cover 69% 93% 54% 0%
Conditions Mostly Cloudy Overcast Partly Cloudy Clear
Sunrise & Sunset
5:50 AM
8:23 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [2.67], Average RMSE [2.83]
The National Weather Service forecast quality is fair. MaxT RMSE [3.17], Average RMSE [2.92] : Use NWS
Source: BestForecast at 9:39 AM EDT on May 21, 2013
Descriptive Forecast
Saturday
partlycloudy Clear in the morning, then mostly cloudy. High of 72F. Breezy. Winds from the NNW at 15 to 20 mph.
Saturday Night
nt_mostlycloudy Overcast. Low of 48F. Winds from the NW at 5 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 51 | 37 62 | 34 67 | 38 54 | 36
Wind 16 mph NW 17 mph NNW 13 mph NNW 9 mph NNW
Humidity 57% 36% 34% 49%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 0% 10% 88% 100%
Conditions Clear Clear Mostly Cloudy Overcast
Sunrise & Sunset
5:49 AM
8:24 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [3.78], Average RMSE [2.21]
The National Weather Service forecast quality is poor. MaxT RMSE [3.74], Average RMSE [3.24] : Use NWS
Source: BestForecast at 9:39 AM EDT on May 21, 2013
Descriptive Forecast
Sunday
partlycloudy Partly cloudy. High of 72F. Winds from the NW at 5 to 10 mph.
Sunday Night
nt_partlycloudy Partly cloudy. Low of 50F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 53 | 35 62 | 37 67 | 38 56 | 38
Wind 6 mph NW 8 mph NNW 5 mph NW 2 mph NW
Humidity 52% 39% 36% 51%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 90% 0% 98% 0%
Conditions Overcast Clear Overcast Clear
Sunrise & Sunset
5:48 AM
8:25 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.45], Average RMSE [2.98]
The National Weather Service forecast quality is poor. MaxT RMSE [3.79], Average RMSE [3.38] : Use NWS
Source: BestForecast at 9:39 AM EDT on May 21, 2013
Descriptive Forecast
Monday
partlycloudy Clear. High of 73F. Winds less than 5 mph.
Monday Night
nt_partlycloudy Partly cloudy. Low of 50F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 50 | 38 65 | 44 68 | 52 56 | 53
Wind 5 mph NNE 5 mph East 5 mph SE 5 mph SSE
Humidity 63% 44% 61% 87%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 98% 0% 0% 38%
Conditions Overcast Clear Clear Partly Cloudy
Sunrise & Sunset
5:48 AM
8:26 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [5.07], Average RMSE [2.98]
The National Weather Service forecast quality is fair. MaxT RMSE [3.31], Average RMSE [3.54] : Use NWS
Source: BestForecast at 9:39 AM EDT on May 21, 2013
Descriptive Forecast
Tuesday
chancerain Partly cloudy with a chance of rain. High of 75F. Winds from the SSE at 5 to 10 mph. Chance of rain 40%.
Tuesday Night
nt_partlycloudy Partly cloudy. Fog overnight. Low of 61F. Winds from the SSE at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 57 | 52 70 | 60 71 | 62 64 | 63
Wind 3 mph SSE 7 mph SSE 8 mph SSE 4 mph SSE
Humidity 82% 70% 72% 96%
Chance of Precip. 20% 10% 10% 10%
Cloud Cover 8% 46% 26% 36%
Conditions Chance of Rain Partly Cloudy Partly Cloudy Fog
Sunrise & Sunset
5:47 AM
8:26 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.89], Average RMSE [4.35]
Source: BestForecast at 9:39 AM EDT on May 21, 2013
Descriptive Forecast
Wednesday
partlycloudy Partly cloudy. High of 81F. Winds less than 5 mph.
Wednesday Night
nt_partlycloudy Partly cloudy. Low of 64F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 64 | 63 76 | 64 76 | 67 67 | 65
Wind 3 mph South 4 mph South 5 mph South 4 mph South
Humidity 95% 67% 69% 97%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 58% 66% 58% 51%
Conditions Fog Mostly Cloudy Partly Cloudy Partly Cloudy
Sunrise & Sunset
5:47 AM
8:27 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [5.42], Average RMSE [4.74]
Source: BestForecast at 9:39 AM EDT on May 21, 2013
Descriptive Forecast
Thursday
partlycloudy Partly cloudy. High of 84F. Winds less than 5 mph.
Thursday Night
nt_partlycloudy Partly cloudy. Low of 66F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 67 | 64 79 | 65 81 | 66 69 | 66
Wind 4 mph South 4 mph SSW 4 mph South 3 mph SSW
Humidity 88% 61% 58% 91%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 45% 41% 40% 35%
Conditions Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy
Sunrise & Sunset
5:46 AM
8:28 PM
Source: BestForecast at 9:39 AM EDT on May 21, 2013
Descriptive Forecast
Friday
partlycloudy Partly cloudy. High of 86F. Winds less than 5 mph.
Friday Night
nt_partlycloudy Clear. Low of 66F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 71 | 64 81 | 66 84 | 67 69 | 67
Wind 3 mph SSW 3 mph SSW 3 mph SSW 2 mph South
Humidity 84% 59% 58% 92%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 26% 31% 51% %
Conditions Partly Cloudy Partly Cloudy Partly Cloudy Clear
Sunrise & Sunset
Sun does not rise
Scientific Forecaster Discussion — MOS Weather Graph
Nearby
History & Almanac
May 21, 2013 Max Temp Min Temp
Normal (KIAD) 76 °F 53 °F
Record (KIAD) 92 °F (1996) 33 °F (1992)
Yesterday 81 °F 66 °F
Yesterday's Cooling Degree Days: 9
Choose a date
Earthquake Activity
City Distance Mag. Time & Date
No recent earthquake activity has been reported nearby.
Minimum magnitude displayed is 2.5.
More information at USGS.gov
Air Quality
  Air Quality AQ Index Pollutant
Yesterday Good
PM10
Yesterday Good
OZONE
Current Good
PM2.5
Current Good
OZONE
Tuesday Moderate
PM2.5
Tuesday Good
OZONE
Wednesday Good
OZONE
Wednesday Good
PM2.5
Thursday Good
OZONE
Thursday Good
PM2.5
Friday Good
OZONE
Friday Good
PM2.5
Coastal Water Temperatures
Place Temperature
Washington, DC 66.9 °F
Baltimore, MD 68.0 °F
Solomons Island, MD 66.9 °F
Marine Forecast
Astronomy
May. 21, 2013 Rise Set
Actual Time 5:52 AM EDT 8:21 PM EDT
Civil Twilight 5:21 AM EDT 8:51 PM EDT
Nautical Twilight 4:43 AM EDT 9:29 PM EDT
Astronomical Twilight 4:01 AM EDT 10:12 PM EDT
Moon 4:34 PM EDT 3:16 AM EDT
Length Of Visible Light 15h 30m
Length of Day
14h 29m
Tomorrow will be 1m 32s longer.
Waxing Gibbous, 83% of the Moon is Illuminated
Today
Waxing Gibbous
May 25
Full
May 31
Last Quarter
Jun 8
New
Jun 16
First Quarter
Visit Astronomy
Today's Extremes
State Highs State Lows
75 °F
Newport News
75 °F
Melfa
74 °F
Tappahannock
73 °F
Williamsburg
73 °F
Franklin
57 °F
Dublin
57 °F
Marion
59 °F
Jonesville
59 °F
Abingdon
60 °F
Hot Springs
Record Extremes
Snow Depth
Station Depth Elevation
No new snow has been reported.
Snow Depth Reports — Snow Depth Map
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Travel Planning
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Aviation
City Temp. Conditions Updated
Dulles Airport 71 °F Haze 9:52 AM EDT
Leesburg 73 °F Overcast 9:55 AM EDT
Manassas 70 °F Overcast 8:55 AM EDT
Gaithersburg 70 °F Overcast 9:55 AM EDT
View all Aviation Tools
Flight To ETA Status
ASQ5080
Atlanta, GA 		KIAD 09:54AM On Time
SCX8605
Des Moines, IA 		KIAD 09:56AM On Time
CHQ6060
New York, NY 		KIAD 10:00AM On Time
FLG3606
Atlanta, GA 		KIAD 10:07AM On Time
Flight Tracker by FlightAware FlightAware
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Type Condition
Flight Rule: IFR (KIAD)
Wind Speed: 7.0 kts.
Wind Dir: 195° (SSW)
Ceiling: 900 ft

METAR KIAD 211352Z 19007KT 6SM HZ BKN009 OVC014 22/19 A3000 RMK AO2 SLP157 T02170189

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Nearby Events
Event Date Forecast
Jason Masi 9:00 PM EDT
2013-04-16		 Chance of Rain, 69°F
Acoustic Tuesday 9:00 PM EDT
2013-04-16		 Chance of Rain, 69°F
Austin Ellis Live 9:00 PM EDT
2013-04-19		 Chance of Rain, 76°F
2013 Ride to Provide 8:00 AM EDT
2013-04-20		 Overcast, 48°F
2013 Ride to Provide Volunteer 7:00 AM EDT
2013-04-20		 Chance of Rain, 50°F
NOVA Roller Derby Presents - NOVA Skate Troopers vs. Atlantic Coast Roller Girls 4:00 PM EDT
2013-04-20		 Partly Cloudy, 66°F
Event data courtesy eviesays.com
Sports
Event Date Forecast
Tigers vs. Indians 7:05 PM EDT on May 21, 2013 Chance of a Thunderstorm, 77 °F
Yankees vs. Orioles 7:05 PM EDT on May 21, 2013 Thunderstorm, 81 °F
Phillies vs. Nationals 7:05 PM EDT on May 24, 2013 Clear, 67 °F
Phillies vs. Nationals 7:15 PM EDT on May 25, 2013 Partly Cloudy, 67 °F
Event Date Forecast
Livorno vs. Brescia 6:30 PM CEST on May 22, 2013 Clear, High 71° F/ 22° C
Empoli vs. Novara 8:45 PM CEST on May 22, 2013 Clear, High 69° F/ 21° C
Portland vs. D.C. 7:00 PM EDT on May 25, 2013 Partly Cloudy, 67 °F
Toronto FC vs. D.C. 7:00 PM EDT on June 15, 2013 Average High 85° F/ 29° C
Event Date Forecast
Coca-Cola 600 6:16 PM EDT on May 26, 2013 Partly Cloudy, 70 °F
FedEx 400 benefiting Autism Speaks 1:15 PM EDT on June 02, 2013 Average High 81° F/ 27° C
Event Date Forecast
Crowne Plaza Invitational at Colonial 8:30 AM CDT on May 23, 2013 Partly Cloudy, 68 °F
Crowne Plaza Invitational at Colonial 8:30 AM CDT on May 24, 2013 Partly Cloudy, 70 °F
AT&T National 8:30 AM EDT on June 27, 2013 Average High 87° F/ 30° C
AT&T National 8:30 AM EDT on June 28, 2013 Average High 86° F/ 29° C
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Weather Stations
Station Location Temp. Heat Index Dew Point Humidity Wind Precipitation Elevation Updated Type Website
VADOT Site_G, Herndon, VA 69 °F - 65 °F 86% SSW  at  6 mph 0.00 in / hr 339 ft 9:14 AM EDT MADIS
NonFedAWOS WASHINGTON DULLES , Dulles, VA 70 °F - 66 °F 88% SSW  at  7 mph 0.00 in / hr 1023 ft 8:59 AM EDT MADIS
Ashburn Village, Ashburn, VA 73.1 °F 72 °F 68 °F 85% WSW  at  0.0 mph - / hr 320 ft 9:56 AM EDT Normal  
Brambleton, Brambleton, VA 72.6 °F 71 °F 68 °F 87% ESE  at  0.0 mph 0.00 in / hr 310 ft 9:59 AM EDT Rapid Fire  
Ashburn Village 1, Ashburn, VA 74.0 °F 74 °F 68 °F 83% SW  at  0.0 mph 0.00 in / hr 279 ft 9:59 AM EDT Rapid Fire  
Falls Brook, Herndon, VA 71.7 °F - 68 °F 87% SE  at  0.0 mph 0.00 in / hr 280 ft 9:54 AM EDT Normal  
Brambleton, Ashburn, VA 73.9 °F 72 °F 70 °F 89% SSW  at  2.7 mph - / hr 358 ft 9:42 AM EDT Normal  
Weatherscience.net, Potomac Falls, VA 74.5 °F 74 °F 69 °F 83% East  at  0.0 mph 0.00 in / hr 276 ft 9:59 AM EDT Rapid Fire
Shaker Woods, Herndon, VA 72.5 °F 71 °F 68 °F 86% South  at  3.1 mph 0.00 in / hr 387 ft 9:59 AM EDT Rapid Fire  
APRSWXNET Reston VA , Herndon, VA 70 °F - 67 °F 89% SW  at  0 mph 0.00 in / hr 454 ft 9:33 AM EDT MADIS
Belmont Country Club, Ashburn, VA 72.8 °F 72 °F 68 °F 86% South  at  1.4 mph 0.00 in / hr 302 ft 9:59 AM EDT Rapid Fire
Chantilly Highlands, Herndon, VA 73.4 °F 71 °F 71 °F 91% South  at  6.9 mph 0.00 in / hr 340 ft 9:59 AM EDT Rapid Fire  
APRSWXNET Great Falls VA , Sterling, VA 69 °F - 67 °F 92% SE  at  0 mph 0.00 in / hr 321 ft 9:29 AM EDT MADIS
Golf Course Island, Reston, VA 71.1 °F 70 °F 66 °F 84% South  at  0.0 mph 0.00 in / hr 390 ft 9:59 AM EDT Rapid Fire  
Ridings at Blue Springs, Chantilly, VA 70.6 °F - 68 °F 91% SSW  at  0.0 mph 0.00 in / hr 303 ft 9:56 AM EDT Normal
Stone Ridge, Stone Ridge, VA 77.4 °F 79 °F 68 °F 73% NNW  at  0.9 mph 0.00 in / hr 365 ft 9:59 AM EDT Rapid Fire  
Wind Power Cube, Chantilly, VA 73.9 °F 73 °F 69 °F 84% South  at  7.6 mph 0.00 in / hr 203 ft 9:59 AM EDT Normal  
Cedar Cove Cluster, Reston, VA 71.4 °F - 67 °F 86% SSW  at  0.0 mph 0.00 in / hr 350 ft 9:59 AM EDT Rapid Fire  
Folkstone, Oak Hill, VA 70.3 °F - 68 °F 93% SSW  at  0.0 mph 0.00 in / hr 375 ft 9:58 AM EDT Rapid Fire  
APRSWXNET Reston VA , Herndon, VA 70 °F - 67 °F 91% WSW  at  2 mph 0.00 in / hr 400 ft 9:22 AM EDT MADIS
Great Falls VA, Great Falls, VA 70.2 °F - 66 °F 86% SSW  at  2.0 mph 0.00 in / hr 380 ft 9:55 AM EDT Normal
APRSWXNET Great Falls VA , Great Falls, VA 69 °F - 66 °F 91% SW  at  0 mph 0.00 in / hr 380 ft 9:21 AM EDT MADIS
Fox Mill, Herndon, VA 71.6 °F 77 °F 41 °F 33% NW  at  1.0 mph 0.00 in / hr 383 ft 9:59 AM EDT Rapid Fire  
Colvin Run at Hunter Mill Rd (One Lane B, Vienna, VA 70.4 °F - 67 °F 88% SW  at  0.0 mph 0.00 in / hr 295 ft 9:55 AM EDT Normal  
Lake Fairfax, Vienna, VA 71.5 °F - 67 °F 87% SW  at  0.0 mph 0.00 in / hr 275 ft 9:59 AM EDT Rapid Fire
Kincaid Forest, Leesburg, VA 75.1 °F 75 °F 71 °F 87% SE  at  1.0 mph 0.00 in / hr 294 ft 9:59 AM EDT Normal  
Hawk Ridge Subdivision, Reston, VA 70.1 °F - 67 °F 89% SE  at  0.0 mph 0.00 in / hr 300 ft 9:50 AM EDT Normal
Kirkpatrick Farms, Aldie, VA 72.7 °F 72 °F 68 °F 85% SW  at  0.0 mph 0.00 in / hr 358 ft 9:45 AM EDT Normal
Big Woods, Leesburg, VA 71.2 °F - 68 °F 91% East  at  0.0 mph 0.00 in / hr 489 ft 9:59 AM EDT Normal  
Lakes at Red Rock, Leesburg, VA 74.6 °F 75 °F 69 °F 82% East  at  1.0 mph 0.00 in / hr 276 ft 9:50 AM EDT Normal  
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