Dulles, VA

6:40 PM EDT on May 21, 2013 (GMT -0400)
Elev: 318 ft
Lon: 77.5° W
Lat: 39.0° N
Source
Rapid Fire Updates™
 Updated 5:52 PM EDT Get Free Weather Stickers® Share:
Your Custom Weather Sticker®

Copy the following lines of HTML:
Get more styles and options for your Weather Sticker® here.
Oklahoma Tornado: More coverage on Catastrophic Tornado in Oklahoma
News
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
Officials say a tornado hit a small hospital in suburban Oklahoma City, but all the 30 patients inside survived.
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?
May 21, 2013
The answer lies in the level of the water table and the soil texture in Oklahoma and in states across the Plains.
Photos: Deadly Tornado Outbreak Strikes Plains
May 21, 2013
A tornado outbreak struck the Plains states on May 19, 2013, leaving widespread damage in its wake.
Children and the Tornado: Helping Kids Cope
May 21, 2013
Any time children are involved in a catastrophe, emotional reactions among survivors and across the nation are particularly strong.
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
May 21, 2013
Moore, Oklahoma is no stranger to devastating tornadoes.
'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.
A Timeline of Deadly Events in Moore, Okla.
May 21, 2013
Check out this comprehensive timeline of the events that transpired in Moore, Okla.
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
Watch as a tornado survivor is interrupted in the middle of interview by a little dog digging out of rubble.
Oklahoma Tornado: How to Help
May 21, 2013
There are several agencies asking for donations to help those hit hard by the Oklahoma tornadoes.
Multiple Children Dead at Okla. School
May 21, 2013
More than a dozen children are dead 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.
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.
More News Articles
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 5:52 PM EDT
Weather Station
Dulles Airport (KIAD)
Elevation
312 ft
Report Station
You are about to report this weather station for bad data.

Please select the information which is incorrect and click 'Submit' otherwise click 'Cancel'.

— Cancel

Now
Scattered Clouds
Scattered Clouds
Temperature
82 °F
Feels Like 86 °F
Wind(mph)
7
Sunrise / Set
5:52 AM
8:21 PM
Moon
Waxing Gibbous
Tonight
Partly Cloudy 68 °F
Partly Cloudy
20% chance of precipitation
Tomorrow
Chance of a Thunderstorm 86 °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 77 | 54 °F
Chance of T-storms
50% chance of precipitation
Friday
Chance of Rain 66 | 48 °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
29.89 in
Visibility
10.0 miles
Clouds
Few 3500 ft
Scattered Clouds 25000 ft
Moisture
Humidity
65%
Rainfall
0.00 in
Snow Depth
Not available.
METAR
METAR KIAD 212152Z 17006KT 10SM FEW035 SCT250 28/21 A2990 RMK AO2 SLP121 T02780206
Don't speak METAR? Read our FAQ.
Weather Radio
Launch Weather Radio
Temperature
Heat Index
86 °F
Dew Point
69 °F
Wind
Speed / Dir
7 mph from South
Wind Gust
Health
UV
2 out of 16
Pollen
8.10 out of 12
Pollen Forecast
Ozone
Good
PM2.5
Moderate
Flu Activity
Sporadic
View Flu Map
Loading…
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 86F. Winds from the South 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 Overcast with a chance of a thunderstorm and a chance of rain. High of 77F. 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, then a chance of rain after midnight. Low of 54F. Winds from the West at 5 to 10 mph. Chance of rain 50%.
Friday
mostlycloudy Mostly cloudy with a chance of rain in the morning, then overcast. High of 66F. Breezy. Winds from the NW at 10 to 20 mph. Chance of rain 20%.
Friday Night
nt_mostlycloudy Overcast in the evening, then mostly cloudy. Low of 48F. Breezy. Winds from the NW at 15 to 20 mph.
Saturday
partlycloudy Overcast in the morning, then mostly cloudy. High of 72F. Breezy. Winds from the NW at 15 to 25 mph.
Saturday Night
nt_partlycloudy Partly cloudy. 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 52F. Winds from the NW at 5 to 10 mph.
Monday
partlycloudy Partly cloudy. High of 72F. Winds less than 5 mph.
Monday Night
nt_clear Clear. Low of 50F. Winds less than 5 mph.
Tuesday
partlycloudy Partly cloudy. High of 75F. Winds less than 5 mph.
Tuesday Night
nt_partlycloudy Partly cloudy. Low of 64F. Winds from the SSE at 5 to 10 mph.
Wednesday
cloudy Overcast with a chance of a thunderstorm. High of 81F. Winds less than 5 mph. Chance of rain 20%.
Wednesday Night
nt_mostlycloudy Overcast. 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 79F. Winds less than 5 mph. Chance of rain 20%.
Saturday Night
nt_clear Clear. Low of 66F. Winds less than 5 mph.
Loading…
 
First Previous Last Next  
Updated:  
 
 

 

Weather Forecast for Dulles VA

View Calendar 10-Day Forecast for station KIAD

Tuesday, 21
Chance of a Thunderstorm
88 | 68 °F
Chance of a Thunderstorm
Chance of
Precipitation
20%
Wednesday, 22
Chance of a Thunderstorm
86 | 68 °F
Chance of T-storms
Chance of
Precipitation
50%
Thursday, 23
Chance of a Thunderstorm
77 | 54 °F
Chance of T-storms
Chance of
Precipitation
50%
Friday, 24
Chance of Rain
66 | 48 °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 | 52 °F
Partly Cloudy
Chance of
Precipitation
0%
Monday, 27
Partly Cloudy
72 | 50 °F
Partly Cloudy
Chance of
Precipitation
0%
Tuesday, 28
Partly Cloudy
75 | 64 °F
Partly Cloudy
Chance of
Precipitation
0%
Wednesday, 29
Chance of a Thunderstorm
81 | 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 3:48 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 67 | 64 77 | 69 82 | 68 71 | 67
Wind 2 mph South 5 mph SSW 9 mph South 6 mph SSW
Humidity 93% 75% 62% 85%
Chance of Precip. 10% 10% 20% 20%
Cloud Cover 65% 100% 56% 64%
Conditions Fog Overcast Chance of a Thunderstorm Chance of a Thunderstorm
Sunrise & Sunset
5:52 AM
8:21 PM
The quality of the forecasted high temperature for this day is excellent. MaxT RMSE [1.45], Average RMSE [2.61]
The National Weather Service forecast quality is excellent. MaxT RMSE [1.33], Average RMSE [1.85] : Use NWS
Source: BestForecast at 3:48 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 86F. Winds from the South 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 69 | 65 79 | 70 80 | 70 72 | 65
Wind 6 mph SSW 9 mph SSW 17 mph South 4 mph NNE
Humidity 86% 68% 68% 80%
Chance of Precip. 10% 40% 40% 50%
Cloud Cover 74% 82% 80% 89%
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 [1.73], Average RMSE [2.46]
The National Weather Service forecast quality is good. MaxT RMSE [2.09], Average RMSE [2.21] : Use NWS
Source: BestForecast at 3:48 PM EDT on May 21, 2013
Descriptive Forecast
Thursday
chancetstorms Overcast with a chance of a thunderstorm and a chance of rain. High of 77F. 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, then a chance of rain after midnight. Low of 54F. Winds from the West at 5 to 10 mph. Chance of rain 50%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 70 | 64 74 | 64 73 | 63 66 | 63
Wind 12 mph South 13 mph SSW 10 mph South 6 mph West
Humidity 83% 69% 69% 92%
Chance of Precip. 50% 50% 50% 40%
Cloud Cover 100% 100% 94% 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 [2.19], Average RMSE [2.43]
The National Weather Service forecast quality is good. MaxT RMSE [2.29], Average RMSE [2.49] : Use NWS
Source: BestForecast at 3:48 PM EDT on May 21, 2013
Descriptive Forecast
Friday
mostlycloudy Mostly cloudy with a chance of rain in the morning, then overcast. High of 66F. Breezy. Winds from the NW at 10 to 20 mph. Chance of rain 20%.
Friday Night
nt_mostlycloudy Overcast in the evening, then mostly cloudy. Low of 48F. Breezy. Winds from the NW at 15 to 20 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 60 | 56 60 | 48 60 | 44 55 | 43
Wind 8 mph West 15 mph NW 17 mph NW 14 mph NW
Humidity 86% 66% 57% 63%
Chance of Precip. 0% 20% 10% 10%
Cloud Cover 92% 81% 84% 86%
Conditions Overcast Chance of Rain Mostly Cloudy Mostly Cloudy
Sunrise & Sunset
5:50 AM
8:23 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [2.81], Average RMSE [3.34]
The National Weather Service forecast quality is fair. MaxT RMSE [2.71], Average RMSE [2.83] : Use NWS
Source: BestForecast at 3:48 PM EDT on May 21, 2013
Descriptive Forecast
Saturday
partlycloudy Overcast in the morning, then mostly cloudy. High of 72F. Breezy. Winds from the NW at 15 to 25 mph.
Saturday Night
nt_partlycloudy Partly cloudy. 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 68 | 38 55 | 36
Wind 17 mph NW 17 mph NW 13 mph NW 8 mph NW
Humidity 57% 35% 33% 49%
Chance of Precip. 10% 0% 0% 0%
Cloud Cover 86% 21% 88% 40%
Conditions Mostly Cloudy Clear Mostly Cloudy Partly Cloudy
Sunrise & Sunset
5:49 AM
8:24 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [3.71], Average RMSE [3.02]
The National Weather Service forecast quality is poor. MaxT RMSE [3.51], Average RMSE [3.29] : Use NWS
Source: BestForecast at 3:48 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 52F. Winds from the NW at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 53 | 36 62 | 33 67 | 41 56 | 43
Wind 9 mph NW 11 mph NW 8 mph WNW 7 mph WNW
Humidity 50% 34% 40% 60%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 4% 17% 61% 100%
Conditions Clear Clear Partly Cloudy Overcast
Sunrise & Sunset
5:48 AM
8:25 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.04], Average RMSE [2.75]
The National Weather Service forecast quality is poor. MaxT RMSE [3.60], Average RMSE [3.30] : Use NWS
Source: BestForecast at 3:48 PM EDT on May 21, 2013
Descriptive Forecast
Monday
partlycloudy Partly cloudy. High of 72F. Winds less than 5 mph.
Monday Night
nt_clear Clear. Low of 50F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 53 | 41 65 | 40 68 | 47 56 | 40
Wind 5 mph NNW 5 mph NNW 2 mph WNW 2 mph WSW
Humidity 63% 40% 47% 55%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 17% 72% 100% 18%
Conditions Clear Mostly Cloudy Overcast Clear
Sunrise & Sunset
5:48 AM
8:26 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.41], Average RMSE [3.00]
The National Weather Service forecast quality is fair. MaxT RMSE [3.34], Average RMSE [3.66] : Use NWS
Source: BestForecast at 3:48 PM EDT on May 21, 2013
Descriptive Forecast
Tuesday
partlycloudy Partly cloudy. High of 75F. Winds less than 5 mph.
Tuesday Night
nt_partlycloudy Partly cloudy. Low of 64F. Winds from the SSE at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 57 | 35 66 | 45 71 | 56 62 | 56
Wind 5 mph North 4 mph East 6 mph SSE 6 mph SSE
Humidity 45% 47% 60% 85%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 46% 46% 40% 63%
Conditions Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy
Sunrise & Sunset
5:47 AM
8:26 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [5.66], Average RMSE [4.45]
Source: BestForecast at 3:48 PM EDT on May 21, 2013
Descriptive Forecast
Wednesday
cloudy Overcast with a chance of a thunderstorm. High of 81F. Winds less than 5 mph. Chance of rain 20%.
Wednesday Night
nt_mostlycloudy Overcast. Low of 64F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 65 | 56 74 | 62 78 | 65 68 | 65
Wind 5 mph SSW 4 mph South 5 mph South 4 mph South
Humidity 74% 65% 63% 91%
Chance of Precip. 0% 0% 10% 10%
Cloud Cover 39% 84% 96% 99%
Conditions Partly Cloudy Mostly Cloudy Overcast Overcast
Sunrise & Sunset
5:47 AM
8:27 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [5.24], Average RMSE [4.92]
Source: BestForecast at 3:48 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 69 | 64 78 | 64 79 | 64 69 | 64
Wind 4 mph South 4 mph SSW 4 mph South 3 mph SSW
Humidity 88% 61% 59% 84%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 43% 41% 35% 31%
Conditions Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy
Sunrise & Sunset
5:46 AM
8:28 PM
Source: BestForecast at 3:48 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 80 | 66 80 | 68 70 | 67
Wind 3 mph SSW 3 mph SSW 3 mph SSW 2 mph South
Humidity 82% 61% 65% 93%
Chance of Precip. 0% 0% 0% 10%
Cloud Cover 29% 26% 21% 26%
Conditions Partly Cloudy Partly Cloudy Clear Partly Cloudy
Sunrise & Sunset
Sun does not rise
Source: BestForecast at 3:48 PM EDT on May 21, 2013
Descriptive Forecast
Saturday
clear Clear with a chance of a thunderstorm. High of 79F. 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 79 | 68 78 | 70 74 | 70
Wind 1 mph SSW 3 mph South 3 mph South 5 mph SSE
Humidity 90% 70% 74% 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 76 °F 53 °F
Record 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 70.0 °F
Baltimore, MD 68.0 °F
Solomons Island, MD 66.0 °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 33s longer.
Waxing Gibbous, 86% 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
Follow us on Twitter Find us on Facebook Community
WunderPhotos®
In between
Inspiration
• • • • • • • • • •
Uploaded by: visionaire
1,613,711 photos uploaded!
Upload a photo now
Visit WunderPhotos
WunderBlogs®
Gifts From My Garden
By Proserpina 6 minutes ago
December 3rd - 70 degrees - WOR...
By HeavySnow 6 hours ago
Visit WunderBlogs
Travel & Activities
Travel Planning
Travel Planner Road Trip Planner
Destination? *
When are you going?
to
Is there an activity you would like to explore?
* Required field
View all Travel Tools
Aviation
City Temp. Conditions Updated
Dulles Airport 82 °F Scattered Clouds 5:52 PM EDT
Leesburg 82 °F Clear 6:35 PM EDT
Manassas 82 °F N/A 6:35 PM EDT
Gaithersburg 82 °F Clear 6:35 PM EDT
View all Aviation Tools
Flight To ETA Status
AFR26
Paris 		KIAD 06:34PM On Time
ASH2646
Charlotte, NC 		KIAD 06:38PM On Time
FDX769
Memphis, TN 		KIAD 06:48PM On Time
SWA303
Denver, CO 		KIAD 06:49PM On Time
Flight Tracker by FlightAware FlightAware
View U.S. Airport Delays
Type Condition
Flight Rule: VFR (KIAD)
Wind Speed: 6.0 kts.
Wind Dir: 170° (South)
Ceiling: Unlimited

METAR KIAD 212152Z 17006KT 10SM FEW035 SCT250 28/21 A2990 RMK AO2 SLP121 T02780206

View all Reports & Maps
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
Sports
Event Date Forecast
Tigers vs. Indians 7:05 PM EDT on May 21, 2013 Chance of a Thunderstorm, 81 °F
Yankees vs. Orioles 7:05 PM EDT on May 21, 2013 Partly Cloudy, 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 69° F/ 21° C
Empoli vs. Novara 8:45 PM CEST on May 22, 2013 Clear, High 68° F/ 20° 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, 77 °F
Crowne Plaza Invitational at Colonial 8:30 AM CDT on May 24, 2013 Partly Cloudy, 85 °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
View all Sports Weather
Videos
Year In Weather 2012

Watch the nearly year-long satellite animation as Weather Underground calls out the most significant weather events of the past year, including Superstorm Sandy and Hurricane Isaac.

Visit Our Video Section
Weather Stations
Station Location Temp. Heat Index Dew Point Humidity Wind Precipitation Elevation Updated Type Website
VADOT Site_G, Herndon, VA 80 °F 82 °F 66 °F 64% SSE  at  11 mph 0.00 in / hr 339 ft 5:54 PM EDT MADIS
NonFedAWOS WASHINGTON DULLES , Dulles, VA 82 °F 85 °F 69 °F 65% South  at  7 mph 0.00 in / hr 1023 ft 5:52 PM EDT MADIS
Ashburn Village, Ashburn, VA 83.1 °F 88 °F 71 °F 66% South  at  0.0 mph - / hr 320 ft 6:27 PM EDT Normal  
Brambleton, Brambleton, VA 84.6 °F 91 °F 72 °F 67% ESE  at  1.0 mph 0.00 in / hr 310 ft 6:39 PM EDT Rapid Fire  
Ashburn Village 1, Ashburn, VA 83.5 °F 88 °F 70 °F 64% South  at  4.0 mph 0.00 in / hr 279 ft 6:40 PM EDT Rapid Fire  
Falls Brook, Herndon, VA 82.5 °F 87 °F 72 °F 70% SSW  at  1.0 mph 0.00 in / hr 280 ft 6:25 PM EDT Normal  
Brambleton, Ashburn, VA 82.9 °F 88 °F 72 °F 70% NW  at  2.2 mph - / hr 358 ft 6:38 PM EDT Normal  
Weatherscience.net, Potomac Falls, VA 84.1 °F 90 °F 72 °F 68% North  at  1.2 mph 0.00 in / hr 276 ft 6:40 PM EDT Rapid Fire
Shaker Woods, Herndon, VA 82.0 °F 86 °F 70 °F 68% SW  at  2.2 mph 0.00 in / hr 387 ft 6:40 PM EDT Rapid Fire  
Belmont Country Club, Ashburn, VA 81.9 °F 86 °F 71 °F 69% SSW  at  9.9 mph 0.00 in / hr 302 ft 6:40 PM EDT Rapid Fire
APRSWXNET Reston VA , Herndon, VA 82 °F 87 °F 72 °F 71% SSW  at  1 mph 0.00 in / hr 454 ft 6:18 PM EDT MADIS
Chantilly Highlands, Herndon, VA 81.5 °F 87 °F 73 °F 75% SE  at  7.6 mph 0.00 in / hr 340 ft 6:40 PM EDT Rapid Fire  
APRSWXNET Great Falls VA , Sterling, VA 82 °F 87 °F 73 °F 74% SSW  at  0 mph 0.00 in / hr 321 ft 6:15 PM EDT MADIS
Ridings at Blue Springs, Chantilly, VA 82.1 °F 87 °F 72 °F 71% South  at  0.0 mph 0.00 in / hr 303 ft 6:36 PM EDT Normal
Stone Ridge, Stone Ridge, VA 87.1 °F 92 °F 70 °F 57% East  at  2.5 mph 0.00 in / hr 365 ft 6:40 PM EDT Rapid Fire  
Golf Course Island, Reston, VA 81.1 °F 84 °F 69 °F 67% SE  at  1.6 mph 0.00 in / hr 390 ft 6:39 PM EDT Rapid Fire  
Chantilly, VA 80.2 °F 85 °F 73 °F 79% South  at  0.7 mph 0.00 in / hr 308 ft 6:39 PM EDT Normal  
Wind Power Cube, Chantilly, VA 82.9 °F 87 °F 71 °F 67% SE  at  9.8 mph 0.00 in / hr 203 ft 6:40 PM EDT Normal  
Folkstone, Oak Hill, VA 80.7 °F 85 °F 72 °F 76% East  at  1.0 mph 0.00 in / hr 375 ft 6:39 PM EDT Rapid Fire  
Cedar Cove Cluster, Reston, VA 82.0 °F 86 °F 72 °F 70% SSE  at  0.0 mph 0.00 in / hr 350 ft 6:40 PM EDT Rapid Fire  
APRSWXNET Reston VA , Herndon, VA 82 °F 86 °F 71 °F 70% South  at  2 mph 0.00 in / hr 400 ft 6:08 PM EDT MADIS
Fox Mill, Herndon, VA 79.3 °F 80 °F 56 °F 44% North  at  0.0 mph 0.00 in / hr 383 ft 6:40 PM EDT Rapid Fire  
Great Falls VA, Great Falls, VA 83.0 °F 87 °F 70 °F 64% SSE  at  4.0 mph 0.00 in / hr 380 ft 6:40 PM EDT Normal
APRSWXNET Great Falls VA , Great Falls, VA 83 °F 86 °F 69 °F 62% South  at  5 mph 0.00 in / hr 380 ft 6:09 PM EDT MADIS
Colvin Run at Hunter Mill Rd (One Lane B, Vienna, VA 81.8 °F 86 °F 71 °F 70% South  at  0.0 mph 0.00 in / hr 295 ft 6:40 PM EDT Normal  
Lake Fairfax, Vienna, VA 81.2 °F 86 °F 72 °F 73% SSE  at  0.0 mph 0.00 in / hr 275 ft 6:40 PM EDT Rapid Fire
Kincaid Forest, Leesburg, VA 85.3 °F 93 °F 74 °F 68% North  at  0.0 mph 0.00 in / hr 294 ft 6:39 PM EDT Normal  
Kirkpatrick Farms, Aldie, VA 83.1 °F 87 °F 70 °F 65% South  at  0.0 mph 0.00 in / hr 358 ft 6:30 PM EDT Normal
Hawk Ridge Subdivision, Reston, VA 79.2 °F 82 °F 70 °F 74% NE  at  0.0 mph 0.00 in / hr 300 ft 6:40 PM EDT Normal
Big Woods, Leesburg, VA 80.1 °F 84 °F 71 °F 74% SE  at  0.0 mph 0.00 in / hr 489 ft 6:39 PM EDT Normal  
Lakes at Red Rock, Leesburg, VA 83.3 °F 87 °F 69 °F 63% ENE  at  1.0 mph 0.00 in / hr 276 ft 6:39 PM EDT Normal  
Would you like to share your weather data with the rest of the world? Add Your Weather Station!