Dulles, VA

9:39 PM EDT on May 21, 2013 (GMT -0400)
Elev: 230 ft
Lon: 77.4° W
Lat: 39.0° N
Source
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Oklahoma Tornado: More coverage on Catastrophic EF-5 Tornado in Oklahoma
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Wind, humidity and rainfall combined precisely to create the massive killer tornado in Moore, Okla. And when they did, the awesome amount of energy released over that city dwarfed the power of the atomic bomb that leveled Hiroshima.
Okla Governor: We Will Rebuild After Tornado
May 21, 2013
The search and rescue efforts are ongoing in Moore, Okla. after a massive tornado levelled the town and local schools.
Weather Imagery Reveals Oklahoma Tornado
May 21, 2013
The Moore, Oklahoma tornado showed up vividly on satellite and radar.
PTSD Risk after the Oklahoma Tornado
May 21, 2013
In the wake of Mondays devastating tornado that ravaged the town of Moore, Okla., survivors are likely to feel incredible shock and numbness.
Tornado Leaves Small Hospital 'Pretty Much Destroyed'
May 21, 2013
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Obama: 'Americans From Every Corner of This Country Will Be With Them'
May 21, 2013
Obama has declared a major disaster in Oklahoma, ordering federal aid to supplement state and local recovery efforts. The president also spoke Monday with Oklahoma Gov. Mary Fallin and Rep. Tom Cole, whose home is in the heavily damaged town of Moore.
Why Don't More Homes in Oklahoma Have Basements?
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Photos: Deadly Tornado Outbreak Strikes Plains
May 21, 2013
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Children and the Tornado: Helping Kids Cope
May 21, 2013
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Recap: Tornadoes Rake Oklahoma, Kansas, Iowa
May 21, 2013
The weather imagery, video and recap from tornadoes in the Plains on May 19, 2013.
Tornado Took Similar Path to 1999 F5
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'I Expected Chaos:' Scenes from Okla. School
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A photographer who was among the first to arrive at an Oklahoma Elementary School after a tornado destroyed it, describes the heart-wrenching scene.
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Check out this comprehensive timeline of the events that transpired in Moore, Okla.
In Tornado's Wake, Worried Parents Seek Out Kids
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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
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Oklahoma Tornado: How to Help
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Weather Summary
Kari Kiefer
Weather Underground midday recap for Tuesday, May 21, 2013.

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

The nearly stationary low over the Northern Plains showed signs of gradual weakening as it shifted eastward toward the Mississippi River Valley on Tuesday, while the system's associated cold front trailed 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 set the stage for multiple clusters of thunderstorms to develop from the Midwest into the Ozarks and the Southern Plains. Portions of north-central/northeastern Texas, southern Arkansas, northwestern Louisiana and far southeastern Oklahoma remained at moderate risk of severe thunderstorm activity as environmental conditions remained favorable for tornadoes, damaging wind gusts, and very large hail. In particular, substantial severe weather was expected across north-central Texas to the

ArkLaTex region this afternoon and evening. Areas surrounding this moderate risk region from the Southern Plains to the Tennessee/Ohio valleys and the Lower Great Lakes/Northeast remained at slight risk of severe thunderstorm development with hail, damaging wind gusts, and isolated tornadoes. In addition to severe storms, heavy rains created chances of flood and possible isolated areas of flash flooding from parts eastern Oklahoma through northern Arkansas.

Meanwhile, areas of heavy rain and widely scattered showers continued 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 inland areas of the Northeast. Continued precipitation in already saturated areas of the Northern Plains and Upper Midwest maintain flood concerns from parts of North Dakota into northern Wisconsin.

Elsewhere, scattered showers and thunderstorms picked up across the Mid-Atlantic and southeastern corner of the nation through the afternoon.
Weather Underground midday recap for Tuesday, May 21, 2013.

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

The nearly stationary low over the Northern Plains showed signs of gradual weakening as it shifted eastward toward the Mississippi River Valley on Tuesday, while the system's associated cold front trailed 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 set the stage for multiple clusters of thunderstorms to develop from the Midwest into the Ozarks and the Southern Plains. Portions of north-central/northeastern Texas, southern Arkansas, northwestern Louisiana and far southeastern Oklahoma remained at moderate risk of severe thunderstorm activity as environmental conditions remained favorable for tornadoes, damaging wind gusts, and very large hail. In particular, substantial severe weather was expected across north-central Texas to the

ArkLaTex region this afternoon and evening. Areas surrounding this moderate risk region from the Southern Plains to the Tennessee/Ohio valleys and the Lower Great Lakes/Northeast remained at slight risk of severe thunderstorm development with hail, damaging wind gusts, and isolated tornadoes. In addition to severe storms, heavy rains created chances of flood and possible isolated areas of flash flooding from parts eastern Oklahoma through northern Arkansas.

Meanwhile, areas of heavy rain and widely scattered showers continued 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 inland areas of the Northeast. Continued precipitation in already saturated areas of the Northern Plains and Upper Midwest maintain flood concerns from parts of North Dakota into northern Wisconsin.

Elsewhere, scattered showers and thunderstorms picked up across the Mid-Atlantic and southeastern corner of the nation through the afternoon.
More News Articles

Dulles Weather at a Glance

Updated 8:54 PM EDT
Elevation
339 ft
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Now
Scattered Clouds
Scattered Clouds
Temperature
76 °F
Feels Like 77 °F
Wind(mph)
6
Sunrise / Set
5:51 AM
8:21 PM
Moon
Waxing Gibbous
Tonight
Partly Cloudy 68 °F
Partly Cloudy
20% chance of precipitation
Tomorrow
Chance of a Thunderstorm 88 °F
Chance of T-storms
50% chance of precipitation
Tomorrow Night
Chance of a Thunderstorm 68 °F
Chance of T-storms
50% chance of precipitation
Thursday
Chance of a Thunderstorm 79 | 52 °F
Chance of T-storms
50% chance of precipitation
Friday
Chance of Rain 66 | 50 °F
Chance of Rain
20% chance of precipitation
Saturday
Partly Cloudy 72 | 48 °F
Partly Cloudy
Tomorrow is forecast to be nearly the same temperature as today.
Conditions
Pressure
29.88 in
Visibility
10.0 miles
Clouds
Few 12000 ft
Scattered Clouds 25000 ft
Moisture
Humidity
74%
Rainfall
0.00 in
Snow Depth
Not available.
METAR
METAR KIAD 220052Z 16005KT 10SM FEW120 SCT250 24/21 A2989 RMK AO2 SLP119 T02440206
Don't speak METAR? Read our FAQ.
Weather Radio
Launch Weather Radio
Temperature
Heat Index
77 °F
Dew Point
67 °F
Wind
Speed / Dir
6 mph from South
Wind Gust
9.0 mph
Health
UV
0 out of 16
Pollen
8.10 out of 12
Pollen Forecast
Ozone
Good
PM2.5
Moderate
Flu Activity
Sporadic
View Flu Map
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Source: BestForecast
Descriptive Forecast
Tuesday Night
nt_partlycloudy Partly cloudy with thunderstorms. Fog overnight. Low of 68F. Winds from the SSW at 5 to 10 mph. Chance of rain 20%.
Wednesday
chancetstorms Mostly cloudy with a chance of a thunderstorm and a chance of rain. High of 88F. Winds from the SSW at 5 to 20 mph. Chance of rain 50%.
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 50%.
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 West at 5 to 10 mph. Chance of rain 40%.
Friday
partlycloudy Overcast with a chance of rain in the morning, then partly cloudy. High of 66F. Breezy. Winds from the NW at 10 to 20 mph. Chance of rain 20%.
Friday Night
nt_partlycloudy Partly cloudy with a chance of rain after midnight. Low of 50F. Breezy. Winds from the NW at 15 to 20 mph. Chance of rain 20%.
Saturday
partlycloudy Clear in the morning, then mostly cloudy. High of 72F. Breezy. Winds from the NW at 15 to 25 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 10 to 15 mph.
Sunday Night
nt_mostlycloudy Mostly cloudy. Low of 50F. Winds from the NW at 5 to 10 mph.
Monday
partlycloudy Clear. High of 73F. Winds less than 5 mph.
Monday Night
nt_partlycloudy Partly cloudy. Low of 45F. Winds less than 5 mph.
Tuesday
clear Clear. High of 75F. Winds less than 5 mph.
Tuesday Night
nt_partlycloudy Partly cloudy. Low of 63F. Winds from the SSE at 5 to 10 mph.
Wednesday
partlycloudy Partly cloudy with a chance of a thunderstorm. High of 82F. Winds less than 5 mph. Chance of rain 20%.
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 Clear. High of 86F. Winds less than 5 mph.
Friday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm. Low of 66F. Winds less than 5 mph. Chance of rain 40%.
Saturday
clear Clear with a chance of a thunderstorm. High of 82F. Winds less than 5 mph. Chance of rain 20%.
Saturday Night
nt_clear Clear. Low of 66F. Winds less than 5 mph.
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Weather Forecast for Dulles VA

View Calendar 10-Day Forecast for station KVAASHBU18

Tuesday, 21
Chance of a Thunderstorm
88 | 68 °F
Chance of a Thunderstorm
Chance of
Precipitation
20%
Wednesday, 22
Chance of a Thunderstorm
88 | 68 °F
Chance of T-storms
Chance of
Precipitation
50%
Thursday, 23
Chance of a Thunderstorm
79 | 52 °F
Chance of T-storms
Chance of
Precipitation
50%
Friday, 24
Chance of Rain
66 | 50 °F
Chance of Rain
Chance of
Precipitation
20%
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 | 45 °F
Partly Cloudy
Chance of
Precipitation
0%
Tuesday, 28
Clear
75 | 63 °F
Clear
Chance of
Precipitation
0%
Wednesday, 29
Chance of a Thunderstorm
82 | 64 °F
Chance of a Thunderstorm
Chance of
Precipitation
20%
Thursday, 30
Partly Cloudy
84 | 66 °F
Partly Cloudy
Chance of
Precipitation
0%
Source: BestForecast at 4:41 PM EDT on May 21, 2013
Descriptive Forecast
Tuesday Night
nt_partlycloudy Partly cloudy with thunderstorms. 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 84 | 68 72 | 66
Wind 2 mph South 5 mph SSW 9 mph South 6 mph SSW
Humidity 95% 62% 59% 83%
Chance of Precip. 10% 10% 20% 20%
Cloud Cover 64% 48% 52% 56%
Conditions Fog Partly Cloudy Chance of a Thunderstorm Chance of a Thunderstorm
Sunrise & Sunset
5:51 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 4:41 PM EDT on May 21, 2013
Descriptive Forecast
Wednesday
chancetstorms Mostly cloudy with a chance of a thunderstorm and a chance of rain. High of 88F. Winds from the SSW at 5 to 20 mph. Chance of rain 50%.
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 50%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 71 | 65 83 | 70 82 | 70 73 | 67
Wind 5 mph SSW 8 mph SSW 16 mph South 6 mph NNE
Humidity 83% 63% 64% 82%
Chance of Precip. 10% 40% 50% 50%
Cloud Cover 67% 66% 76% 100%
Conditions Fog Chance of a Thunderstorm 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 4:41 PM 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 West at 5 to 10 mph. Chance of rain 40%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 73 | 64 75 | 64 73 | 63 67 | 63
Wind 11 mph South 13 mph SSW 10 mph South 6 mph West
Humidity 75% 68% 69% 85%
Chance of Precip. 50% 50% 50% 40%
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 4:41 PM EDT on May 21, 2013
Descriptive Forecast
Friday
partlycloudy Overcast with a chance of rain in the morning, then partly cloudy. High of 66F. Breezy. Winds from the NW at 10 to 20 mph. Chance of rain 20%.
Friday Night
nt_partlycloudy Partly cloudy with a chance of rain after midnight. Low of 50F. Breezy. Winds from the NW at 15 to 20 mph. Chance of rain 20%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 58 | 54 65 | 47 60 | 44 55 | 43
Wind 8 mph West 15 mph NW 17 mph NW 14 mph NW
Humidity 88% 52% 53% 63%
Chance of Precip. 0% 20% 10% 10%
Cloud Cover 69% 93% 67% 0%
Conditions Mostly Cloudy Chance of Rain Mostly Cloudy Clear
Sunrise & Sunset
5:49 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 4:41 PM EDT on May 21, 2013
Descriptive Forecast
Saturday
partlycloudy Clear in the morning, then mostly cloudy. High of 72F. Breezy. Winds from the NW at 15 to 25 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 | 36 62 | 33 67 | 38 54 | 36
Wind 17 mph NW 18 mph NW 14 mph NW 8 mph NW
Humidity 58% 33% 33% 49%
Chance of Precip. 10% 10% 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 4:41 PM EDT on May 21, 2013
Descriptive Forecast
Sunday
partlycloudy Partly cloudy. High of 72F. Winds from the NW at 10 to 15 mph.
Sunday Night
nt_mostlycloudy Mostly cloudy. Low of 50F. Winds from the NW at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 53 | 36 61 | 33 67 | 41 56 | 43
Wind 9 mph NW 11 mph NW 9 mph WNW 8 mph WNW
Humidity 50% 35% 40% 61%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 90% 0% 98% 97%
Conditions Overcast Clear Overcast Overcast
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 4:41 PM 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 45F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 50 | 40 65 | 40 70 | 45 49 | 38
Wind 5 mph NW 5 mph NNW 2 mph WNW 3 mph WNW
Humidity 68% 37% 40% 69%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 98% 3% 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 4:41 PM EDT on May 21, 2013
Descriptive Forecast
Tuesday
clear Clear. High of 75F. Winds less than 5 mph.
Tuesday Night
nt_partlycloudy Partly cloudy. Low of 63F. Winds from the SSE at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 57 | 35 70 | 45 71 | 56 61 | 56
Wind 5 mph North 4 mph East 6 mph SSE 6 mph SSE
Humidity 41% 38% 58% 85%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 1% 0% 23% 53%
Conditions Clear Clear Clear Partly Cloudy
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 4:41 PM EDT on May 21, 2013
Descriptive Forecast
Wednesday
partlycloudy Partly cloudy with a chance of a thunderstorm. High of 82F. Winds less than 5 mph. Chance of rain 20%.
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 | 56 76 | 62 80 | 65 68 | 65
Wind 4 mph SSW 4 mph South 5 mph South 4 mph South
Humidity 74% 61% 62% 91%
Chance of Precip. 0% 0% 10% 10%
Cloud Cover 40% 38% 39% 41%
Conditions Partly Cloudy Partly 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 4:41 PM 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 | 64 81 | 64 69 | 64
Wind 4 mph South 4 mph SSW 4 mph South 3 mph SSW
Humidity 88% 59% 53% 85%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 44% 43% 36% 32%
Conditions Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy
Sunrise & Sunset
5:46 AM
8:28 PM
Source: BestForecast at 4:41 PM EDT on May 21, 2013
Descriptive Forecast
Friday
partlycloudy Clear. High of 86F. Winds less than 5 mph.
Friday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm. Low of 66F. Winds less than 5 mph. Chance of rain 40%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 71 | 64 81 | 66 84 | 68 69 | 67
Wind 3 mph SSW 3 mph SSW 3 mph SSW 2 mph South
Humidity 82% 59% 59% 94%
Chance of Precip. 0% 0% 0% 10%
Cloud Cover 30% 26% 21% 26%
Conditions Partly Cloudy Partly Cloudy Clear Partly Cloudy
Sunrise & Sunset
Sun does not rise
Source: BestForecast at 4:41 PM EDT on May 21, 2013
Descriptive Forecast
Saturday
clear Clear with a chance of a thunderstorm. High of 82F. Winds less than 5 mph. Chance of rain 20%.
Saturday Night
nt_clear Clear. Low of 66F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 71 | 68 78 | 68 80 | 70 74 | 70
Wind 1 mph SSW 3 mph SSW 3 mph South 4 mph SSE
Humidity 91% 73% 70% 83%
Chance of Precip. 10% 10% 10% 0%
Cloud Cover 41% % % %
Conditions Partly Cloudy Clear Clear 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 Moderate
PM2.5
Current Good
OZONE
Tuesday Moderate
PM2.5
Tuesday Good
OZONE
Wednesday Moderate
PM2.5
Wednesday Good
OZONE
Thursday Good
OZONE
Thursday Good
PM2.5
Friday Good
OZONE
Friday Good
PM2.5
Coastal Water Temperatures
Place Temperature
Washington, DC 69.1 °F
Baltimore, MD 69.1 °F
Solomons Island, MD 69.1 °F
Marine Forecast
Astronomy
May. 21, 2013 Rise Set
Actual Time 5:51 AM EDT 8:21 PM EDT
Civil Twilight 5:21 AM EDT 8:51 PM EDT
Nautical Twilight 4:43 AM EDT 9:30 PM EDT
Astronomical Twilight 4:01 AM EDT 10:12 PM EDT
Moon 4:34 PM EDT (5/21) 3:16 AM EDT (5/21)
Length Of Visible Light 15h 30m
Length of Day
14h 29m
Tomorrow will be 1m 32s longer.
Waxing Gibbous, 87% 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
89 °F
Roanoke
88 °F
Lynchburg
88 °F
Staunton
88 °F
Martinsville
87 °F
Winchester
56 °F
Blacksburg
57 °F
Marion
57 °F
Dublin
59 °F
Jonesville
59 °F
Abingdon
Record Extremes
Snow Depth
Station Depth Elevation
No new snow has been reported.
Snow Depth Reports — Snow Depth Map
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Aviation
City Temp. Conditions Updated
Dulles Airport 76 °F Scattered Clouds 8:52 PM EDT
Leesburg 77 °F Clear 9:35 PM EDT
Gaithersburg 75 °F Clear 9:35 PM EDT
Manassas 72 °F N/A 9:35 PM EDT
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Flight To ETA Status
ASQ5714
New York, NY 		KIAD 09:30PM On Time
SWA3162
Chicago, IL 		KIAD 09:33PM On Time
ASQ6120
Providence, RI 		KIAD 09:35PM On Time
UAL812
Dallas-Fort Worth, TX 		KIAD 09:39PM On Time
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Type Condition
Flight Rule: VFR (KIAD)
Wind Speed: 5.0 kts.
Wind Dir: 182° (South)
Ceiling: Unlimited

METAR KIAD 220052Z 16005KT 10SM FEW120 SCT250 24/21 A2989 RMK AO2 SLP119 T02440206

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Nearby Events
Event Date Forecast
Joe Iconis & Family 7:00 PM EDT
2013-04-15		 Rain Showers, 63°F
Joe Iconis & Family 11:00 PM EDT
2013-04-20		 Partly Cloudy, 51°F
Event data courtesy eviesays.com
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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 76 °F 77 °F 67 °F 74% South  at  6 mph 0.00 in / hr 339 ft 8:54 PM EDT MADIS
Ashburn Village, Ashburn, VA 77.2 °F 79 °F 71 °F 80% SSW  at  0.0 mph - / hr 320 ft 9:27 PM EDT Normal  
Ashburn Village 1, Ashburn, VA 76.9 °F 78 °F 70 °F 80% SSW  at  0.0 mph 0.00 in / hr 279 ft 9:39 PM EDT Rapid Fire  
Weatherscience.net, Potomac Falls, VA 74.8 °F 75 °F 70 °F 85% NNE  at  1.2 mph 0.00 in / hr 276 ft 9:39 PM EDT Rapid Fire
Falls Brook, Herndon, VA 74.3 °F 74 °F 70 °F 86% South  at  0.0 mph 0.00 in / hr 280 ft 9:25 PM EDT Normal  
NonFedAWOS WASHINGTON DULLES , Dulles, VA 76 °F 77 °F 69 °F 79% SSE  at  6 mph 0.00 in / hr 1023 ft 8:52 PM EDT MADIS
Belmont Country Club, Ashburn, VA 76.8 °F 78 °F 70 °F 80% SSE  at  0.0 mph 0.00 in / hr 302 ft 9:39 PM EDT Rapid Fire
APRSWXNET Great Falls VA , Sterling, VA 76 °F 77 °F 71 °F 85% South  at  0 mph 0.00 in / hr 321 ft 9:15 PM EDT MADIS
Brambleton, Brambleton, VA 77.1 °F 79 °F 71 °F 81% WNW  at  2.0 mph 0.00 in / hr 310 ft 9:39 PM EDT Rapid Fire  
Shaker Woods, Herndon, VA 76.3 °F 77 °F 70 °F 80% SW  at  2.2 mph 0.00 in / hr 387 ft 9:39 PM EDT Rapid Fire  
APRSWXNET Reston VA , Herndon, VA 76 °F 77 °F 70 °F 81% South  at  0 mph 0.00 in / hr 454 ft 9:18 PM EDT MADIS
Brambleton, Ashburn, VA 75.7 °F 76 °F 71 °F 85% West  at  1.7 mph - / hr 358 ft 9:30 PM EDT Normal  
Golf Course Island, Reston, VA 75.8 °F 77 °F 69 °F 79% SE  at  0.0 mph 0.00 in / hr 390 ft 9:39 PM EDT Rapid Fire  
Chantilly Highlands, Herndon, VA 76.1 °F 76 °F 73 °F 89% West  at  2.2 mph 0.00 in / hr 340 ft 9:39 PM EDT Rapid Fire  
Great Falls VA, Great Falls, VA 74.0 °F 74 °F 68 °F 83% South  at  1.0 mph 0.00 in / hr 380 ft 9:35 PM EDT Normal
APRSWXNET Great Falls VA , Great Falls, VA 75 °F 75 °F 69 °F 81% South  at  1 mph 0.00 in / hr 380 ft 9:11 PM EDT MADIS
Kincaid Forest, Leesburg, VA 77.2 °F 79 °F 72 °F 84% SE  at  0.0 mph 0.00 in / hr 294 ft 9:39 PM EDT Normal  
Gracie's Window in FranklinGlen, Fairfax, VA 76.7 °F 79 °F 64 °F 65% North  at  0.0 mph 0.00 in / hr 365 ft 9:39 PM EDT Rapid Fire  
Stone Ridge, Stone Ridge, VA 76.6 °F 78 °F 70 °F 80% East  at  1.6 mph 0.00 in / hr 365 ft 9:39 PM EDT Normal  
Ridings at Blue Springs, Chantilly, VA 75.8 °F 77 °F 70 °F 82% SSW  at  0.0 mph 0.00 in / hr 303 ft 9:36 PM EDT Normal
Colvin Run at Hunter Mill Rd (One Lane B, Vienna, VA 72.8 °F 71 °F 69 °F 87% South  at  0.0 mph 0.00 in / hr 295 ft 9:35 PM EDT Normal  
APRSWXNET Reston VA , Herndon, VA 76 °F 77 °F 70 °F 82% SSE  at  0 mph 0.00 in / hr 400 ft 9:08 PM EDT MADIS
Cedar Cove Cluster, Reston, VA 75.2 °F 76 °F 69 °F 81% South  at  1.6 mph 0.00 in / hr 350 ft 9:38 PM EDT Rapid Fire  
Lake Fairfax, Vienna, VA 72.6 °F 70 °F 69 °F 89% SSW  at  0.0 mph 0.00 in / hr 275 ft 9:39 PM EDT Rapid Fire
Lakes at Red Rock, Leesburg, VA 76.6 °F 78 °F 69 °F 78% SSE  at  0.0 mph 0.00 in / hr 276 ft 9:29 PM EDT Normal  
Folkstone, Oak Hill, VA 73.7 °F 72 °F 71 °F 90% SSE  at  0.0 mph 0.00 in / hr 375 ft 9:38 PM EDT Rapid Fire  
Chantilly, VA 74.8 °F 73 °F 72 °F 92% SSW  at  0.1 mph 0.00 in / hr 308 ft 9:39 PM EDT Normal  
Fox Mill, Herndon, VA 73.6 °F 76 °F 39 °F 29% WNW  at  0.0 mph 0.00 in / hr 383 ft 9:39 PM EDT Rapid Fire  
Big Woods, Leesburg, VA 74.4 °F 74 °F 69 °F 83% SE  at  0.0 mph 0.00 in / hr 489 ft 9:39 PM EDT Normal  
Wind Power Cube, Chantilly, VA 75.9 °F 77 °F 70 °F 83% South  at  7.6 mph 0.00 in / hr 203 ft 9:39 PM EDT Normal  
Hawk Ridge Subdivision, Reston, VA 72.0 °F - 69 °F 89% NE  at  0.0 mph 0.00 in / hr 300 ft 9:30 PM EDT Normal
APRSWXNET Great Falls V, Great Falls, VA 75 °F 76 °F 68 °F 78% SW  at  0 mph 0.00 in / hr 296 ft 9:12 PM EDT MADIS
APRSWXNET Darnestown1-SW MD , Germantown, MD 73 °F 72 °F 69 °F 86% ESE  at  2 mph 0.00 in / hr 395 ft 9:17 PM EDT MADIS
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