Herndon, VA

4:30 PM EDT on May 27, 2012 (GMT -0400)
Elev: 341 ft
Lon: 77.4° W
Lat: 39.0° N
Source
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Active Advisory: Air Quality Alert (US Severe Weather)
Tropical Weather: Tropical Storm Beryl (North Atlantic) Tropical Storm Sanvu (Western Pacific)
Weather Summary
Shaun Tanner
Weather Underground Forecast for Sunday, May 27, 2012. More interesting weather for many parts of the country is expected Sunday. Subtropical Storm Beryl will continue on its path toward the northeast coast of Florida near Georgia. It is expected to make landfall with tropical storm strength winds either late Sunday night or early Monday morning. This storm will not be a signficant wind threat, and the rain associated with it will mostly be a blessing to this region as it has suffered through an exceptional drought.

Elsewhere, an intense heat wave will continue for the Plains and Southeast while also spreading northward into the Ohio Valley and Upper Midwest. Maximum temperature records are most likely to be broken for many areas as temperatures will soar into the 90s and 100s. Even more dangerous will be the heat index values over 100 degrees. The heat index tells you how hot the air feels. The more humid the weather, the higher the heat index will soar. Thankfully, many areas will not experience the extremely high humidity common during the Summer months.

In the West, a strong storm will move through the Northern Rockies and into the Dakotas. This storm will bring widespread rain and even some snow from Idaho through Minnesota. The associated cold front will move through the Plains, possibly instigating some strong thunderstorms that could become severe.

The Northeast will rise into the 70s and 80s, while the Southeast and Southern Plains will see temperatures in the 90s and 100s. The Northwest will rise into the 70s.
Weather Underground Forecast for Sunday, May 27, 2012. More interesting weather for many parts of the country is expected Sunday. Subtropical Storm Beryl will continue on its path toward the northeast coast of Florida near Georgia. It is expected to make landfall with tropical storm strength winds either late Sunday night or early Monday morning. This storm will not be a signficant wind threat, and the rain associated with it will mostly be a blessing to this region as it has suffered through an exceptional drought.

Elsewhere, an intense heat wave will continue for the Plains and Southeast while also spreading northward into the Ohio Valley and Upper Midwest. Maximum temperature records are most likely to be broken for many areas as temperatures will soar into the 90s and 100s. Even more dangerous will be the heat index values over 100 degrees. The heat index tells you how hot the air feels. The more humid the weather, the higher the heat index will soar. Thankfully, many areas will not experience the extremely high humidity common during the Summer months.

In the West, a strong storm will move through the Northern Rockies and into the Dakotas. This storm will bring widespread rain and even some snow from Idaho through Minnesota. The associated cold front will move through the Plains, possibly instigating some strong thunderstorms that could become severe.

The Northeast will rise into the 70s and 80s, while the Southeast and Southern Plains will see temperatures in the 90s and 100s. The Northwest will rise into the 70s.
Weather Underground Broadcast Network

Herndon Weather at a Glance

Updated 3:58 PM EDT
Weather Station - report
VADOT Site_G, Herndon
Elevation
339 ft
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Now
Scattered Clouds
Scattered Clouds
Temperature
84 °F
Feels Like 85 °F
Wind(mph)
7
Sunrise / Set
5:47 AM
8:26 PM
Moon
Waxing Crescent
Tonight
Partly Cloudy 68 °F
Partly Cloudy
Tomorrow
Chance of a Thunderstorm 90 °F
Chance of T-storms
20% chance of precipitation
Tomorrow Night
Chance of a Thunderstorm 70 °F
Chance of T-storms
20% chance of precipitation
Tuesday
Chance of a Thunderstorm 88 | 68 °F
Chance of T-storms
30% chance of precipitation
Wednesday
Fog 84 | 59 °F
Fog
Thursday
Clear 81 | 64 °F
Clear
Tomorrow is forecast to be Warmer than today.
Conditions
Pressure
30.08 in
Visibility
10.0 miles
Clouds
Few 4500 ft
Scattered Clouds 25000 ft
Moisture
Humidity
50%
Rainfall
0.00 in
Snow Depth
Not available.
METAR
METAR KIAD 271952Z 18009KT 10SM FEW045 SCT250 29/19 A3008 RMK AO2 SLP184 T02940189
Don't speak METAR? Read our FAQ.
Weather Radio
Launch Weather Radio
Temperature
Heat Index
85 °F
Dew Point
63 °F
Wind
Speed / Dir
7 mph from South
Wind Gust
13.0 mph
Health
UV
6 out of 16
Pollen
7.70 out of 12
Pollen Forecast
Ozone
Good
PM2.5
Good
Flu Activity
Sporadic
View Flu Map
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Source: BestForecast
Descriptive Forecast
Sunday Night
nt_partlycloudy Partly cloudy. Low of 68F. Winds from the South at 5 to 10 mph.
Monday
chancetstorms Partly cloudy with a chance of a thunderstorm and a chance of rain in the afternoon. High of 90F with a heat index of 97F. Winds from the SSW at 5 to 10 mph. Chance of rain 20%.
Monday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm and a chance of rain. Low of 70F. Winds from the South at 5 to 10 mph. Chance of rain 20%.
Tuesday
chancetstorms Partly cloudy with a chance of a thunderstorm and a chance of rain. High of 88F with a heat index of 99F. Winds from the SSW at 5 to 15 mph. Chance of rain 30%.
Tuesday Night
nt_chancetstorms Overcast with a chance of a thunderstorm and rain. Fog overnight. Low of 68F. Winds from the WSW at 5 to 10 mph. Chance of rain 60% with rainfall amounts near 0.5 in. possible.
Wednesday
partlycloudy Partly cloudy. Fog early. High of 84F. Winds from the West at 5 to 10 mph.
Wednesday Night
nt_clear Clear. Low of 59F. Winds from the NW at 5 to 15 mph.
Thursday
clear Clear. High of 81F. Winds from the NW at 5 to 15 mph.
Thursday Night
nt_partlycloudy Partly cloudy. Low of 64F. Winds less than 5 mph.
Friday
chancerain Mostly cloudy with a chance of rain. High of 75F. Winds from the SE at 5 to 15 mph. Chance of rain 60%.
Friday Night
nt_tstorms Partly cloudy with thunderstorms. Low of 59F. Winds from the SW at 5 to 15 mph. Chance of rain 80% with rainfall amounts near 1.3 in. possible.
Saturday
partlycloudy Partly cloudy. High of 75F. Breezy. Winds from the WNW at 10 to 20 mph.
Saturday Night
nt_clear Clear. Low of 57F. Winds from the NW at 10 to 15 mph.
Sunday
clear Clear. High of 77F. Winds from the WNW at 10 to 15 mph.
Sunday Night
nt_clear Partly cloudy. Low of 59F. Winds from the West at 5 to 10 mph.
Monday
partlycloudy Partly cloudy. High of 86F. Winds less than 5 mph.
Monday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm. Low of 61F. Winds less than 5 mph. Chance of rain 20%.
Tuesday
chancetstorms Partly cloudy with a chance of a thunderstorm. High of 82F with a heat index of 90F. Winds less than 5 mph. Chance of rain 40%.
Tuesday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm. Low of 64F. Winds less than 5 mph. Chance of rain 40%.
Wednesday
chancetstorms Mostly cloudy with a chance of a thunderstorm. High of 84F with a heat index of 100F. Winds less than 5 mph. Chance of rain 40%.
Wednesday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm. Low of 64F. Winds less than 5 mph. Chance of rain 20%.
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Forecast

View Calendar 10-Day Forecast for station KVAHERND8

Sunday, 27
Partly Cloudy
86 | 68 °F
Partly Cloudy
Chance of
Precipitation
10%
Monday, 28
Chance of a Thunderstorm
90 | 70 °F
Chance of T-storms
Chance of
Precipitation
20%
Tuesday, 29
Chance of a Thunderstorm
88 | 68 °F
Chance of T-storms
Chance of
Precipitation
30%
Wednesday, 30
Fog
84 | 59 °F
Fog
Chance of
Precipitation
0%
Thursday, 31
Clear
81 | 64 °F
Clear
Chance of
Precipitation
0%
Friday, 1
Chance of Rain
75 | 59 °F
Chance of Rain
Chance of
Precipitation
60%
Saturday, 2
Partly Cloudy
75 | 57 °F
Partly Cloudy
Chance of
Precipitation
0%
Sunday, 3
Clear
77 | 59 °F
Clear
Chance of
Precipitation
0%
Monday, 4
Partly Cloudy
86 | 61 °F
Partly Cloudy
Chance of
Precipitation
0%
Tuesday, 5
Chance of a Thunderstorm
82 | 64 °F
Chance of T-storms
Chance of
Precipitation
40%
Source: BestForecast at 10:00 AM EDT on May 27, 2012
Descriptive Forecast
Sunday Night
nt_partlycloudy Partly cloudy. Low of 68F. Winds from the South at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 71 | 69 83 | 69 82 | 68 71 | 67
Wind 4 mph SSE 6 mph South 6 mph South 6 mph SSE
Humidity 96% 64% 63% 84%
Chance of Precip. 10% 10% 10% 10%
Cloud Cover 45% 42% 54% 63%
Conditions Fog 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 good. MaxT RMSE [1.96], Average RMSE [1.61]
The National Weather Service forecast quality is good. MaxT RMSE [1.89], Average RMSE [1.59] : Use NWS
Source: BestForecast at 10:00 AM EDT on May 27, 2012
Descriptive Forecast
Monday
chancetstorms Partly cloudy with a chance of a thunderstorm and a chance of rain in the afternoon. High of 90F with a heat index of 97F. Winds from the SSW at 5 to 10 mph. Chance of rain 20%.
Monday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm and a chance of rain. Low of 70F. Winds from the South at 5 to 10 mph. Chance of rain 20%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 69 | 69 83 | 73 87 | 73 74 | 71
Wind 5 mph South 8 mph SSW 8 mph South 5 mph South
Humidity 99% 68% 63% 89%
Chance of Precip. 10% 10% 20% 20%
Cloud Cover 57% 39% 57% 44%
Conditions Partly Cloudy Partly Cloudy Chance of a Thunderstorm Chance of a Thunderstorm
Sunrise & Sunset
5:47 AM
8:26 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [2.16], Average RMSE [2.41]
The National Weather Service forecast quality is good. MaxT RMSE [1.78], Average RMSE [1.96] : Use NWS
Source: BestForecast at 10:00 AM EDT on May 27, 2012
Descriptive Forecast
Tuesday
chancetstorms Partly cloudy with a chance of a thunderstorm and a chance of rain. High of 88F with a heat index of 99F. Winds from the SSW at 5 to 15 mph. Chance of rain 30%.
Tuesday Night
nt_chancetstorms Overcast with a chance of a thunderstorm and rain. Fog overnight. Low of 68F. Winds from the WSW at 5 to 10 mph. Chance of rain 60% with rainfall amounts near 0.5 in. possible.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 71 | 69 84 | 74 86 | 71 74 | 73
Wind 6 mph SSW 9 mph SSW 11 mph SSW 5 mph WSW
Humidity 95% 70% 61% 91%
Chance of Precip. 10% 30% 30% 40%
Cloud Cover 41% 50% 65% 94%
Conditions Partly Cloudy Chance of a Thunderstorm Chance of a Thunderstorm Chance of a Thunderstorm
Sunrise & Sunset
5:46 AM
8:27 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [2.79], Average RMSE [2.27]
The National Weather Service forecast quality is good. MaxT RMSE [2.38], Average RMSE [2.00] : Use NWS
Source: BestForecast at 10:00 AM EDT on May 27, 2012
Descriptive Forecast
Wednesday
partlycloudy Partly cloudy. Fog early. High of 84F. Winds from the West at 5 to 10 mph.
Wednesday Night
nt_clear Clear. Low of 59F. Winds from the NW at 5 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 69 | 67 79 | 66 81 | 57 64 | 60
Wind 5 mph WSW 5 mph West 6 mph WNW 8 mph NW
Humidity 94% 63% 42% 86%
Chance of Precip. 10% 10% 10% 0%
Cloud Cover 93% 57% 35% 21%
Conditions Fog Partly Cloudy Partly Cloudy Clear
Sunrise & Sunset
5:46 AM
8:28 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [2.25], Average RMSE [1.96]
The National Weather Service forecast quality is fair. MaxT RMSE [2.75], Average RMSE [1.77] : Use NWS
Source: BestForecast at 10:00 AM EDT on May 27, 2012
Descriptive Forecast
Thursday
clear Clear. High of 81F. Winds from the NW at 5 to 15 mph.
Thursday Night
nt_partlycloudy Partly cloudy. Low of 64F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 60 | 53 77 | 51 75 | 50 64 | 60
Wind 10 mph NW 10 mph NNW 5 mph NW 1 mph ESE
Humidity 78% 40% 42% 88%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 0% 0% 0% 84%
Conditions Clear Clear Clear Mostly Cloudy
Sunrise & Sunset
5:46 AM
8:28 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [3.28], Average RMSE [2.33]
The National Weather Service forecast quality is fair. MaxT RMSE [2.98], Average RMSE [2.09] : Use NWS
Source: BestForecast at 10:00 AM EDT on May 27, 2012
Descriptive Forecast
Friday
chancerain Mostly cloudy with a chance of rain. High of 75F. Winds from the SE at 5 to 15 mph. Chance of rain 60%.
Friday Night
nt_tstorms Partly cloudy with thunderstorms. Low of 59F. Winds from the SW at 5 to 15 mph. Chance of rain 80% with rainfall amounts near 1.3 in. possible.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 65 | 62 73 | 64 66 | 63 62 | 61
Wind 4 mph ESE 10 mph SE 12 mph SE 6 mph SSW
Humidity 88% 77% 89% 93%
Chance of Precip. 0% 20% 30% 50%
Cloud Cover 58% 96% 100% 75%
Conditions Partly Cloudy Chance of Rain Chance of Rain Thunderstorm
Sunrise & Sunset
5:46 AM
8:28 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [2.48], Average RMSE [2.46]
The National Weather Service forecast quality is poor. MaxT RMSE [3.55], Average RMSE [2.49] : Use NWS
Source: BestForecast at 10:00 AM EDT on May 27, 2012
Descriptive Forecast
Saturday
partlycloudy Partly cloudy. High of 75F. Breezy. Winds from the WNW at 10 to 20 mph.
Saturday Night
nt_clear Clear. Low of 57F. Winds from the NW at 10 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 63 | 63 72 | 61 70 | 60 60 | 56
Wind 8 mph WNW 13 mph West 16 mph NW 11 mph NW
Humidity 94% 69% 72% 87%
Chance of Precip. 10% 10% 10% 0%
Cloud Cover 7% 46% 41% 2%
Conditions Clear Partly Cloudy Partly Cloudy Clear
Sunrise & Sunset
5:46 AM
8:28 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [2.94], Average RMSE [2.92]
The National Weather Service forecast quality is poor. MaxT RMSE [3.57], Average RMSE [2.56] : Use NWS
Source: BestForecast at 10:00 AM EDT on May 27, 2012
Descriptive Forecast
Sunday
clear Clear. High of 77F. Winds from the WNW at 10 to 15 mph.
Sunday Night
nt_clear Partly cloudy. Low of 59F. Winds from the West at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 60 | 58 72 | 58 73 | 58 62 | 54
Wind 12 mph WNW 14 mph NW 10 mph WNW 5 mph WNW
Humidity 91% 59% 60% 76%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 1% 0% 0% 24%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:46 AM
8:28 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [3.17], Average RMSE [3.06]
Source: BestForecast at 10:00 AM EDT on May 27, 2012
Descriptive Forecast
Monday
partlycloudy Partly cloudy. High of 86F. Winds less than 5 mph.
Monday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm. Low of 61F. Winds less than 5 mph. Chance of rain 20%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 63 | 58 75 | 62 78 | 65 64 | 62
Wind 4 mph West 5 mph West 4 mph West 2 mph West
Humidity 84% 61% 64% 92%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 40% 49% 50% 52%
Conditions Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy
Sunrise & Sunset
5:46 AM
8:28 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [3.49], Average RMSE [3.75]
Source: BestForecast at 10:00 AM EDT on May 27, 2012
Descriptive Forecast
Tuesday
chancetstorms Partly cloudy with a chance of a thunderstorm. High of 82F with a heat index of 90F. Winds less than 5 mph. Chance of rain 40%.
Tuesday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm. Low of 64F. Winds less than 5 mph. Chance of rain 40%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 65 | 62 77 | 74 80 | 75 67 | 63
Wind 2 mph WSW 2 mph SW 2 mph SW 2 mph WSW
Humidity 87% 87% 85% 88%
Chance of Precip. 10% 10% 10% 10%
Cloud Cover 54% 52% 44% 50%
Conditions Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy
Sunrise & Sunset
5:46 AM
8:28 PM
Source: BestForecast at 10:00 AM EDT on May 27, 2012
Descriptive Forecast
Wednesday
chancetstorms Mostly cloudy with a chance of a thunderstorm. High of 84F with a heat index of 100F. Winds less than 5 mph. Chance of rain 40%.
Wednesday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm. Low of 64F. Winds less than 5 mph. Chance of rain 20%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 67 | 65 77 | 77 80 | 78 67 | 65
Wind 2 mph West 2 mph WNW 2 mph WNW 1 mph WNW
Humidity 94% 96% 94% 94%
Chance of Precip. 10% 10% 10% 10%
Cloud Cover 71% 83% 86% %
Conditions Mostly Cloudy Mostly Cloudy Mostly Cloudy Clear
Sunrise & Sunset
5:46 AM
8:28 PM
Scientific Forecaster Discussion — MOS Weather Graph
Nearby
History & Almanac
May 27, 2012 Max Temp Min Temp
Normal (KIAD) 78 °F 53 °F
Record (KIAD) 92 °F (1965) 37 °F (1972)
Yesterday 86 °F 66 °F
Yesterday's Cooling Degree Days: 11
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
OZONE
Yesterday Good
PM10
Current Good
PM2.5
Current Good
OZONE
Sunday Unhealthy for Sensitive Groups
OZONE
Sunday Moderate
PM2.5
Monday Moderate
OZONE
Monday Moderate
PM2.5
Tuesday Moderate
OZONE
Tuesday Moderate
PM2.5
Wednesday Good
OZONE
Wednesday Good
PM2.5
Coastal Water Temperatures
Place Temperature
Washington, DC 79.0 °F
Baltimore, MD 77.0 °F
Solomons Island, MD 75.0 °F
Marine Forecast
Astronomy
May. 27, 2012 Rise Set
Actual Time 5:47 AM EDT 8:26 PM EDT
Civil Twilight 5:16 AM EDT 8:57 PM EDT
Nautical Twilight 4:38 AM EDT 9:36 PM EDT
Astronomical Twilight 3:54 AM EDT 10:19 PM EDT
Moon 11:49 AM EDT 12:33 AM EDT
Length Of Visible Light 15h 40m
Length of Day
14h 38m
Tomorrow will be 1m 17s longer.
Waxing Crescent, 40% of the Moon is Illuminated
Today
Waxing Crescent
May 28
First Quarter
Jun 4
Full
Jun 11
Last Quarter
Jun 19
New
Visit Astronomy
Today's Extremes
State Highs State Lows
90 °F
Warrenton
89 °F
Williamsburg
89 °F
Quantico
89 °F
Jonesville
89 °F
Fredericksburg
60 °F
South Hill
60 °F
Emporia
61 °F
West Point
62 °F
Martinsville
62 °F
Lynchburg
Record Extremes
Snow Depth
Station Depth Elevation
No new snow has been reported.
Snow Depth Reports — Snow Depth Map
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Travel & Activities
Travel Planning
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Nearby Events
Event Date Forecast
Flora the Red Menace 7:00 PM EDT 2012-05-27 Mostly Cloudy, 83°F
Ketura + The Storyboard + Electric Animals + The Right Condition + Mercury In Summer 6:00 PM EDT 2012-05-27 Mostly Cloudy, 83°F
Viva Vienna Festival 4:00 PM EDT 2012-05-28 Chance of a Thunderstorm, 89°F
Mr. Knick Knack! Children's Performance 10:00 AM EDT 2012-05-28 Partly Cloudy, 80°F
Mega Multi Vendor Garage Sale 9:00 AM EDT 2012-05-28 Partly Cloudy, 77°F
Dart Night 8:00 PM EDT 2012-05-29 Chance of a Thunderstorm, 82°F
Event data courtesy eviesays.com
Aviation
City Temp. Conditions Updated
Dulles Airport 85 °F Scattered Clouds 3:52 PM EDT
Leesburg 88 °F Clear 4:15 PM EDT
Gaithersburg 86 °F Clear 4:15 PM EDT
Manassas 86 °F Clear 3:45 PM EDT
View all Aviation Tools
Flight To ETA Status
UAL400
San Francisco, CA 		KIAD 04:31PM On Time
CJC3862
Staunton/Waynesboro/Harrisonburg, VA 		KIAD 04:32PM On Time
FLG4105
New York, NY 		KIAD 04:39PM On Time
AAL76
Los Angeles, CA 		KIAD 04:42PM On Time
Flight Tracker by FlightAware FlightAware
View U.S. Airport Delays
Type Condition
Flight Rule: VFR (KIAD)
Wind Speed: 9.0 kts.
Wind Dir: 169° (South)
Ceiling: Unlimited

METAR KIAD 271952Z 18009KT 10SM FEW045 SCT250 29/19 A3008 RMK AO2 SLP184 T02940189

View all Reports & Maps
Sports
Event Date Forecast
Rockies vs. Reds 1:10 PM EDT on May 27, 2012 Partly Cloudy, 94 °F
Padres vs. Mets 1:10 PM EDT on May 27, 2012 Partly Cloudy, 79 °F
Braves vs. Nationals 7:05 PM EDT on June 01, 2012 Chance of a Thunderstorm, 74 °F
Braves vs. Nationals 4:05 PM EDT on June 02, 2012 Partly Cloudy, 72 °F
Event Date Forecast
Huesca vs. Deportivo 8:00 PM CEST on May 27, 2012 Chance of Rain, High 62° F/ 17° C
Celta Vigo vs. Gimnàstic 8:00 PM CEST on May 27, 2012 Scattered Clouds, High 75° F/ 24° C
Montreal vs. D.C. 7:30 PM EDT on June 30, 2012 Average High 87° F/ 30° C
Columbus vs. D.C. 7:30 PM EDT on August 04, 2012 Average High 88° F/ 31° C
Event Date Forecast
Coca-Cola 600 6:16 PM EDT on May 27, 2012 Partly Cloudy, 85 °F
FedEx 400 benefiting Autism Speaks 1:15 PM EDT on June 03, 2012 Average High 79° F/ 26° C
Event Date Forecast
the Memorial Tournament presented by Nationwide Insurance 8:30 AM EDT on May 31, 2012 Partly Cloudy, 56 °F
the Memorial Tournament presented by Nationwide Insurance 8:30 AM EDT on June 01, 2012 Chance of a Thunderstorm, 56 °F
AT&T National 8:30 AM EDT on June 28, 2012 Average High 86° F/ 29° C
AT&T National 8:30 AM EDT on June 29, 2012 Average High 87° F/ 30° C
View all Sports Weather
Weather Stations
Station Location Temp. Heat Index Dew Point Humidity Wind Precipitation Elevation Updated Type Website
VADOT Site_G, Herndon, VA 84 °F 85 °F 63 °F 50% South  at  7 mph 0.00 in / hr 339 ft 3:58 PM EDT MADIS
Reston - West Market, Reston, VA 89.1 °F 92 °F 67 °F 48% NW  at  2.2 mph 0.00 in / hr 430 ft 4:30 PM EDT Rapid Fire  
APRSWXNET Reston VA , Herndon, VA 84 °F 87 °F 68 °F 58% SSW  at  5 mph 0.00 in / hr 454 ft 4:03 PM EDT MADIS
Falls Brook, Herndon, VA 87.8 °F 92 °F 69 °F 54% SSW  at  0.0 mph 0.00 in / hr 280 ft 4:18 PM EDT Normal  
Golf Course Island, Reston, VA 86.1 °F 89 °F 68 °F 54% SE  at  4.0 mph 0.00 in / hr 390 ft 4:30 PM EDT Rapid Fire  
Monterey Estates, Herndon, VA 87.8 °F 94 °F 71 °F 58% WSW  at  3.5 mph 0.00 in / hr 390 ft 4:30 PM EDT Rapid Fire  
APRSWXNET Reston VA , Herndon, VA 85 °F 88 °F 68 °F 56% South  at  2 mph 0.00 in / hr 400 ft 3:53 PM EDT MADIS
APRSWXNET Great Falls VA , Sterling, VA 85 °F 91 °F 71 °F 64% ESE  at  0 mph 0.00 in / hr 321 ft 3:37 PM EDT MADIS
Chantilly Highlands, Herndon, VA 86.5 °F 91 °F 70 °F 58% SW  at  5.4 mph 0.00 in / hr 340 ft 4:30 PM EDT Rapid Fire  
Colvin Run at Hunter Mill Rd (One Lane B, Vienna, VA 86.4 °F 91 °F 70 °F 59% SSW  at  0.0 mph 0.00 in / hr 295 ft 4:30 PM EDT Normal  
Cedar Cove Cluster, Reston, VA 84.4 °F 89 °F 70 °F 62% NE  at  0.0 mph 0.00 in / hr 350 ft 4:30 PM EDT Rapid Fire  
Lake Fairfax, Vienna, VA 86.4 °F 91 °F 70 °F 59% SSW  at  0.0 mph 0.00 in / hr 275 ft 4:30 PM EDT Rapid Fire
Hickory Creek, Great Falls, VA 84.3 °F 87 °F 68 °F 58% WSW  at  0.0 mph 0.00 in / hr 350 ft 4:30 PM EDT Rapid Fire
Great Falls VA, Great Falls, VA 86.8 °F 89 °F 66 °F 50% SE  at  5.0 mph 0.00 in / hr 380 ft 4:30 PM EDT Normal
APRSWXNET Great Falls VA , Great Falls, VA 86 °F 88 °F 66 °F 51% SSE  at  3 mph 0.00 in / hr 380 ft 4:01 PM EDT MADIS
Weatherscience.net, Potomac Falls, VA 89.3 °F 95 °F 70 °F 54% WNW  at  3.5 mph 0.00 in / hr 276 ft 4:30 PM EDT Rapid Fire
Hawk Ridge Subdivision, Reston, VA 83.0 °F 86 °F 68 °F 61% North  at  0.0 mph 0.00 in / hr 300 ft 4:30 PM EDT Normal
Folkstone, Oak Hill, VA 85.0 °F 90 °F 70 °F 62% South  at  1.0 mph 0.00 in / hr 375 ft 4:30 PM EDT Rapid Fire  
Gracie's Window in FranklinGlen, Fairfax, VA 91.3 °F 97 °F 70 °F 50% North  at  0.0 mph 0.00 in / hr 365 ft 4:30 PM EDT Rapid Fire  
Franklin Glen/KR4YO, Fairfax, VA 87.6 °F 92 °F 70 °F 55% South  at  3.8 mph 0.00 in / hr 367 ft 4:30 PM EDT Rapid Fire  
APRSWXNET Great Falls V, Great Falls, VA 89 °F 90 °F 64 °F 43% ESE  at  1 mph 0.00 in / hr 296 ft 4:02 PM EDT MADIS
Ashburn Village, Ashburn, VA 86.8 °F 90 °F 68 °F 53% South  at  0.0 mph - / hr 320 ft 4:19 PM EDT Normal  
Brookfield, Chantilly, VA 84.9 °F 82 °F 39 °F 20% SSW  at  3.1 mph 0.00 in / hr 260 ft 4:30 PM EDT Normal  
VADOT Site_C, Oakton, VA 86 °F 88 °F 66 °F 51% North  at  - 0.00 in / hr 290 ft 3:56 PM EDT MADIS
Wind Power Cube, Chantilly, VA 88.2 °F 91 °F 66 °F 48% South  at  9.2 mph 0.00 in / hr 203 ft 4:30 PM EDT Rapid Fire  
Ashburn Village 1, Ashburn, VA 89.9 °F 93 °F 66 °F 46% NNW  at  0.0 mph 0.00 in / hr 279 ft 4:30 PM EDT Rapid Fire  
Trott Ave, Vienna, VA 88.0 °F 94 °F 71 °F 58% SSE  at  0.0 mph - / hr 415 ft 4:28 PM EDT Normal  
VADOT Site_E, Oakton, VA 87 °F 90 °F 66 °F 51% North  at  - 0.00 in / hr 353 ft 4:04 PM EDT MADIS
Brambleton, Brambleton, VA 89.7 °F 96 °F 71 °F 54% SE  at  1.0 mph 0.00 in / hr 310 ft 4:30 PM EDT Rapid Fire  
Ridings at Blue Springs, Chantilly, VA 86.3 °F 91 °F 69 °F 57% SSW  at  0.0 mph 0.00 in / hr 303 ft 4:28 PM EDT Normal
Broadlands, Ashburn, VA 87.1 °F 91 °F 68 °F 53% SSE  at  9.0 mph 0.00 in / hr 391 ft 4:30 PM EDT Rapid Fire  
Beulah-Wolf Trap, Vienna, VA 86.4 °F 91 °F 70 °F 58% ENE  at  0.0 mph 0.00 in / hr 430 ft 4:30 PM EDT Rapid Fire  
NE Vienna, Vienna, VA 86.7 °F 91 °F 69 °F 56% WSW  at  5.0 mph - / hr 417 ft 4:15 PM EDT Normal  
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Air Quality Alert
Mobile & Email Alerts Statement as of 4:25 PM EDT on May 26, 2012

... Air quality alert is in effect for Sunday may 27 2012...

The metropolitan Washington Council of governments in association
with Maryland department of the environment, Virginia department
of environmental quality, and district department of environment
has issued a code Orange air quality alert Sunday for
the DC Metro area.

A code Orange air quality alert means that air pollution
concentrations within the region may become unhealthy for sensitive
groups. Sensitive groups include children... people suffering from
asthma... heart disease or other lung diseases... and the elderly.
The effects of air pollution can be minimized by avoiding strenuous
activity or exercise outdoors.

For more information on ground-level ozone and fine
particles... visit www.Cleanairpartners.Net.