Dulles, VA

9:05 PM EDT on May 22, 2012 (GMT -0400)
Elev: 318 ft
Lon: 77.5° W
Lat: 39.0° N
Source
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 Updated 8:38 PM EDT Get Free Weather Stickers® Share:
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Active Advisory: Flash Flood Watch (US Severe Weather) Active Notice: Local Storm Report
Tropical Weather: Post-Tropical Cyclone Alberto (North Atlantic) Tropical Storm Bud (East Pacific) Tropical Storm Sanvu (Western Pacific)
Weather Summary
Tim Roche
Weather Underground midday recap for Tuesday, May 22, 2012.

Wet weather spread across the Northeast on Tuesday as a disorganized series of fronts stretched over the region. Moisture from the remains of Tropical Storm Alberto also flowed ashore, enhancing the intensity of the rain. Temperatures throughout the East were generally moderate despite the clouds, though relative humidity levels were fairly high.

Clouds broke up to the West of the Ohio Valley, where temperatures were warmer and humidity dropped off substantially. Temperatures were also warm in the Southeast and Plains.

Clear skies spread across the Rockies into the Southwest as well with the entire region under sunny skies with warm temperatures.

Clouds were back in the Picture in the Northwest where low pressure just off the coast brought rain to the to Washington and Oregon. Some of the rain along the coast and north of Portland was heavy, with several inches of precipitation reported just north of the city.

In the Atlantic. Tropical Storm Alberto had dissipated into a disorganized mass of clouds and thunderstorms by by Tuesday afternoon, though the storm was still churning up a significant portion of sea.
Weather Underground midday recap for Tuesday, May 22, 2012.

Wet weather spread across the Northeast on Tuesday as a disorganized series of fronts stretched over the region. Moisture from the remains of Tropical Storm Alberto also flowed ashore, enhancing the intensity of the rain. Temperatures throughout the East were generally moderate despite the clouds, though relative humidity levels were fairly high.

Clouds broke up to the West of the Ohio Valley, where temperatures were warmer and humidity dropped off substantially. Temperatures were also warm in the Southeast and Plains.

Clear skies spread across the Rockies into the Southwest as well with the entire region under sunny skies with warm temperatures.

Clouds were back in the Picture in the Northwest where low pressure just off the coast brought rain to the to Washington and Oregon. Some of the rain along the coast and north of Portland was heavy, with several inches of precipitation reported just north of the city.

In the Atlantic. Tropical Storm Alberto had dissipated into a disorganized mass of clouds and thunderstorms by by Tuesday afternoon, though the storm was still churning up a significant portion of sea.
Weather Underground Broadcast Network

Dulles Weather at a Glance

Updated 8:38 PM EDT
Weather Station - report
VADOT Site_G, Herndon
Elevation
339 ft
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Now
Mostly Cloudy
Mostly Cloudy
Temperature
72 °F
Feels Like 73 °F
Wind(mph)
5
Sunrise / Set
5:51 AM
8:22 PM
Moon
Waxing Crescent
Tonight
Thunderstorm 61 °F
T-storms
60% chance of precipitation
Tomorrow
Thunderstorm 75 °F
T-storms
70% chance of precipitation
Tomorrow Night
Chance of a Thunderstorm 64 °F
Chance of T-storms
40% chance of precipitation
Thursday
Chance of a Thunderstorm 84 | 64 °F
Chance of T-storms
40% chance of precipitation
Friday
Fog 81 | 64 °F
Fog
Saturday
Mostly Cloudy 86 | 68 °F
Mostly Cloudy
Tomorrow is forecast to be Cooler than today.
Conditions
Pressure
29.84 in
Visibility
10.0 miles
Clouds
Few 3200 ft
Mostly Cloudy 6000 ft
Mostly Cloudy 20000 ft
Moisture
Humidity
76%
Rainfall
0.04 in
Snow Depth
Not available.
METAR
METAR KIAD 230052Z 00000KT 10SM FEW032 BKN060 BKN200 21/19 A2984 RMK AO2 SLP104 T02060189
Don't speak METAR? Read our FAQ.
Weather Radio
Launch Weather Radio
Temperature
Heat Index
73 °F
Dew Point
64 °F
Wind
Speed / Dir
5 mph from SE
Wind Gust
7.0 mph
Health
UV
0 out of 16
Pollen
5.60 out of 12
Pollen Forecast
Ozone
Good
PM2.5
Good
Flu Activity
Local Activity
View Flu Map
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Source: BestForecast
Descriptive Forecast
Tuesday Night
nt_tstorms Overcast with thunderstorms, then a chance of rain after midnight. Fog overnight. Low of 61F. Winds less than 5 mph. Chance of rain 60%.
Wednesday
tstorms Mostly cloudy with thunderstorms and rain showers. High of 75F. Winds less than 5 mph. Chance of rain 70% with rainfall amounts near 0.4 in. possible.
Wednesday Night
nt_chancetstorms Mostly cloudy with a chance of a thunderstorm and a chance of rain, then a chance of rain after midnight. Low of 64F. Winds from the SE at 5 to 10 mph. Chance of rain 40%.
Thursday
chancetstorms Mostly cloudy with a chance of rain in the morning, then partly cloudy with a chance of a thunderstorm and a chance of rain. High of 84F. Breezy. Winds from the SSE at 5 to 25 mph with gusts to 30 mph. Chance of rain 40%.
Thursday Night
nt_mostlycloudy Mostly cloudy with a chance of a thunderstorm and a chance of rain in the evening, then overcast. Fog overnight. Low of 64F. Winds from the South at 5 to 10 mph.
Friday
partlycloudy Overcast in the morning, then partly cloudy. Fog early. High of 81F. Winds from the South at 5 to 10 mph.
Friday Night
nt_partlycloudy Partly cloudy. Fog overnight. Low of 64F. Winds less than 5 mph.
Saturday
mostlycloudy Overcast. High of 86F with a heat index of 91F. Winds from the North at 5 to 10 mph shifting to the ESE in the afternoon.
Saturday Night
nt_fog Partly cloudy. Fog overnight. Low of 68F. Winds from the South at 5 to 10 mph. Chance of rain 30%.
Sunday
chancetstorms Partly cloudy with a chance of a thunderstorm. High of 88F with a heat index of 95F. Winds from the SSW at 5 to 10 mph. Chance of rain 40%.
Sunday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm. Fog overnight. Low of 70F. Winds from the SSW at 5 to 10 mph. Chance of rain 20%.
Monday
partlycloudy Partly cloudy. High of 91F with a heat index of 99F. Winds from the SSW at 5 to 10 mph.
Monday Night
nt_cloudy Overcast. Low of 66F. Winds from the SSW at 5 to 10 mph.
Tuesday
chancetstorms Mostly cloudy with a chance of a thunderstorm. High of 84F. Winds from the SW at 5 to 10 mph. Chance of rain 40%.
Tuesday Night
nt_chancetstorms Mostly cloudy with a chance of a thunderstorm. Low of 66F. Winds from the WSW at 5 to 10 mph. Chance of rain 70% with rainfall amounts near 0.6 in. possible.
Wednesday
chancetstorms Partly cloudy with a chance of a thunderstorm. High of 82F. Winds less than 5 mph. Chance of rain 40%.
Wednesday Night
nt_chancerain Partly cloudy with a chance of rain. Low of 61F. Winds less than 5 mph. Chance of rain 20%.
Thursday
partlycloudy Partly cloudy. High of 82F with a heat index of 88F. Winds less than 5 mph.
Thursday Night
nt_chancerain Partly cloudy with a chance of rain. Low of 61F. Winds less than 5 mph. Chance of rain 20%.
Friday
chancetstorms Mostly cloudy with a chance of a thunderstorm. High of 82F with a heat index of 93F. Winds less than 5 mph. Chance of rain 40%.
Friday Night
nt_chancetstorms Mostly cloudy with a chance of a thunderstorm. Low of 63F. Winds less than 5 mph. Chance of rain 40%.
Saturday
chancetstorms Clear with a chance of a thunderstorm. High of 82F with a heat index of 91F. Winds less than 5 mph. Chance of rain 20%.
Saturday Night
nt_clear Clear. Low of 63F. Winds less than 5 mph.
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Nowcast as of 8:13 PM EDT on May 22, 2012
Scattered to numerous showers and thunderstorms will spread into the western suburbs of Baltimore and Washington as well as the northern Piedmont by 11 PM. Until then... a brief stray shower will be possible producing up to a tenth inch of rainfall.
Flash Flood Watch in effect until 6 am EDT Wednesday...

Forecast

View Calendar 10-Day Forecast for station KVAASHBU18

Tuesday, 22
Thunderstorm
79 | 61 °F
T-storms
Chance of
Precipitation
60%
Wednesday, 23
Thunderstorm
75 | 64 °F
T-storms
Chance of
Precipitation
70%
Thursday, 24
Chance of a Thunderstorm
84 | 64 °F
Chance of T-storms
Chance of
Precipitation
40%
Friday, 25
Fog
81 | 64 °F
Fog
Chance of
Precipitation
0%
Saturday, 26
Mostly Cloudy
86 | 68 °F
Mostly Cloudy
Chance of
Precipitation
0%
Sunday, 27
Chance of a Thunderstorm
88 | 70 °F
Chance of T-storms
Chance of
Precipitation
40%
Monday, 28
Partly Cloudy
91 | 66 °F
Partly Cloudy
Chance of
Precipitation
0%
Tuesday, 29
Chance of a Thunderstorm
84 | 66 °F
Chance of T-storms
Chance of
Precipitation
40%
Wednesday, 30
Chance of a Thunderstorm
82 | 61 °F
Chance of T-storms
Chance of
Precipitation
40%
Thursday, 31
Partly Cloudy
82 | 61 °F
Partly Cloudy
Chance of
Precipitation
0%
Source: BestForecast at 6:53 PM EDT on May 22, 2012
Descriptive Forecast
Tuesday Night
nt_tstorms Overcast with thunderstorms, then a chance of rain after midnight. Fog overnight. Low of 61F. Winds less than 5 mph. Chance of rain 60%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 65 | 65 72 | 67 72 | 66 68 | 68
Wind 2 mph SE 2 mph ESE 5 mph SSE 2 mph SSE
Humidity 98% 85% 83% 100%
Chance of Precip. 90% 60% 60% 60%
Cloud Cover 100% 90% 75% 83%
Conditions Rain Showers Chance of Rain 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 [1.89], Average RMSE [1.90]
The National Weather Service forecast quality is good. MaxT RMSE [1.63], Average RMSE [1.86] : Use NWS
Source: BestForecast at 6:53 PM EDT on May 22, 2012
Descriptive Forecast
Wednesday
tstorms Mostly cloudy with thunderstorms and rain showers. High of 75F. Winds less than 5 mph. Chance of rain 70% with rainfall amounts near 0.4 in. possible.
Wednesday Night
nt_chancetstorms Mostly cloudy with a chance of a thunderstorm and a chance of rain, then a chance of rain after midnight. Low of 64F. Winds from the SE at 5 to 10 mph. Chance of rain 40%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 63 | 63 73 | 63 71 | 63 67 | 64
Wind 1 mph WNW 2 mph East 7 mph South 4 mph SE
Humidity 100% 72% 74% 88%
Chance of Precip. 60% 70% 70% 40%
Cloud Cover 92% 83% 83% 75%
Conditions Chance of Rain Thunderstorm Thunderstorm Chance of a Thunderstorm
Sunrise & Sunset
5:50 AM
8:23 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [2.10], Average RMSE [2.59]
The National Weather Service forecast quality is good. MaxT RMSE [1.95], Average RMSE [1.81] : Use NWS
Source: BestForecast at 6:53 PM EDT on May 22, 2012
Descriptive Forecast
Thursday
chancetstorms Mostly cloudy with a chance of rain in the morning, then partly cloudy with a chance of a thunderstorm and a chance of rain. High of 84F. Breezy. Winds from the SSE at 5 to 25 mph with gusts to 30 mph. Chance of rain 40%.
Thursday Night
nt_mostlycloudy Mostly cloudy with a chance of a thunderstorm and a chance of rain in the evening, then overcast. Fog overnight. Low of 64F. Winds from the South at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 65 | 65 75 | 65 73 | 62 70 | 68
Wind 6 mph ESE 8 mph SE 17 mph SSW 7 mph SSE
Humidity 99% 70% 65% 92%
Chance of Precip. 10% 40% 40% 10%
Cloud Cover 73% 75% 59% 85%
Conditions Mostly Cloudy Chance of Rain Chance of a Thunderstorm Fog
Sunrise & Sunset
5:49 AM
8:23 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [2.06], Average RMSE [2.35]
The National Weather Service forecast quality is fair. MaxT RMSE [2.63], Average RMSE [2.91] : Use NWS
Source: BestForecast at 6:53 PM EDT on May 22, 2012
Descriptive Forecast
Friday
partlycloudy Overcast in the morning, then partly cloudy. Fog early. High of 81F. Winds from the South at 5 to 10 mph.
Friday Night
nt_partlycloudy Partly cloudy. Fog overnight. Low of 64F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 67 | 67 77 | 67 80 | 64 73 | 65
Wind 5 mph South 6 mph SSW 8 mph South 4 mph SSW
Humidity 98% 71% 58% 77%
Chance of Precip. 0% 0% 0% 10%
Cloud Cover 100% 99% 48% 48%
Conditions Fog Overcast Partly Cloudy Fog
Sunrise & Sunset
5:49 AM
8:24 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [2.65], Average RMSE [2.98]
The National Weather Service forecast quality is fair. MaxT RMSE [3.15], Average RMSE [3.24] : Use NWS
Source: BestForecast at 6:53 PM EDT on May 22, 2012
Descriptive Forecast
Saturday
mostlycloudy Overcast. High of 86F with a heat index of 91F. Winds from the North at 5 to 10 mph shifting to the ESE in the afternoon.
Saturday Night
nt_fog Partly cloudy. Fog overnight. Low of 68F. Winds from the South at 5 to 10 mph. Chance of rain 30%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 69 | 66 81 | 69 82 | 70 75 | 74
Wind 3 mph NW 5 mph NNE 7 mph SE 5 mph SSE
Humidity 92% 68% 65% 97%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 38% 100% 100% 99%
Conditions Fog Overcast Overcast Fog
Sunrise & Sunset
5:48 AM
8:25 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.72], Average RMSE [3.51]
The National Weather Service forecast quality is fair. MaxT RMSE [3.40], Average RMSE [3.72] : Use NWS
Source: BestForecast at 6:53 PM EDT on May 22, 2012
Descriptive Forecast
Sunday
chancetstorms Partly cloudy with a chance of a thunderstorm. High of 88F with a heat index of 95F. Winds from the SSW at 5 to 10 mph. Chance of rain 40%.
Sunday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm. Fog overnight. Low of 70F. Winds from the SSW at 5 to 10 mph. Chance of rain 20%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 69 | 69 83 | 69 84 | 73 77 | 72
Wind 4 mph SSW 7 mph SSW 8 mph South 7 mph SSW
Humidity 97% 62% 64% 85%
Chance of Precip. 30% 10% 20% 10%
Cloud Cover 68% 25% 32% 98%
Conditions Chance of a Thunderstorm Clear Chance of a Thunderstorm Fog
Sunrise & Sunset
5:48 AM
8:25 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.06], Average RMSE [3.65]
The National Weather Service forecast quality is poor. MaxT RMSE [3.88], Average RMSE [4.03] : Use NWS
Source: BestForecast at 6:53 PM EDT on May 22, 2012
Descriptive Forecast
Monday
partlycloudy Partly cloudy. High of 91F with a heat index of 99F. Winds from the SSW at 5 to 10 mph.
Monday Night
nt_cloudy Overcast. Low of 66F. Winds from the SSW at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 73 | 71 83 | 70 86 | 67 73 | 66
Wind 4 mph SW 5 mph SSW 10 mph South 8 mph SSW
Humidity 94% 63% 52% 78%
Chance of Precip. 10% 0% 10% 10%
Cloud Cover 0% 1% 49% 98%
Conditions Fog Clear Partly Cloudy Overcast
Sunrise & Sunset
5:48 AM
8:25 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [3.49], Average RMSE [3.51]
The National Weather Service forecast quality is poor. MaxT RMSE [4.12], Average RMSE [4.17] : Use NWS
Source: BestForecast at 6:53 PM EDT on May 22, 2012
Descriptive Forecast
Tuesday
chancetstorms Mostly cloudy with a chance of a thunderstorm. High of 84F. Winds from the SW at 5 to 10 mph. Chance of rain 40%.
Tuesday Night
nt_chancetstorms Mostly cloudy with a chance of a thunderstorm. Low of 66F. Winds from the WSW at 5 to 10 mph. Chance of rain 70% with rainfall amounts near 0.6 in. possible.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 71 | 69 80 | 62 83 | 65 74 | 68
Wind 8 mph SSW 8 mph SW 9 mph SSW 7 mph SW
Humidity 91% 54% 54% 81%
Chance of Precip. 0% 0% 30% 30%
Cloud Cover 96% 72% 75% 63%
Conditions Overcast Mostly Cloudy Chance of a Thunderstorm Chance of a Thunderstorm
Sunrise & Sunset
5:48 AM
8:25 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [3.94], Average RMSE [3.99]
Source: BestForecast at 6:53 PM EDT on May 22, 2012
Descriptive Forecast
Wednesday
chancetstorms Partly cloudy with a chance of a thunderstorm. High of 82F. Winds less than 5 mph. Chance of rain 40%.
Wednesday Night
nt_chancerain Partly cloudy with a chance of rain. Low of 61F. Winds less than 5 mph. Chance of rain 20%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 69 | 67 79 | 63 80 | 60 70 | 62
Wind 4 mph West 2 mph West 1 mph WSW 1 mph South
Humidity 93% 61% 48% 76%
Chance of Precip. 30% 10% 10% 10%
Cloud Cover 66% 74% 61% 49%
Conditions Chance of a Thunderstorm Mostly Cloudy Partly Cloudy Partly Cloudy
Sunrise & Sunset
5:48 AM
8:25 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.30], Average RMSE [4.57]
Source: BestForecast at 6:53 PM EDT on May 22, 2012
Descriptive Forecast
Thursday
partlycloudy Partly cloudy. High of 82F with a heat index of 88F. Winds less than 5 mph.
Thursday Night
nt_chancerain Partly cloudy with a chance of rain. Low of 61F. Winds less than 5 mph. Chance of rain 20%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 65 | 58 76 | 70 80 | 73 67 | 62
Wind 1 mph SSE 2 mph SSE 4 mph SSE 3 mph SSE
Humidity 79% 79% 78% 84%
Chance of Precip. 10% 0% 0% 0%
Cloud Cover 38% 37% 46% 56%
Conditions Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy
Sunrise & Sunset
5:48 AM
8:25 PM
Source: BestForecast at 6:53 PM EDT on May 22, 2012
Descriptive Forecast
Friday
chancetstorms Mostly cloudy with a chance of a thunderstorm. High of 82F with a heat index of 93F. Winds less than 5 mph. Chance of rain 40%.
Friday Night
nt_chancetstorms Mostly cloudy with a chance of a thunderstorm. Low of 63F. Winds less than 5 mph. Chance of rain 40%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 65 | 63 76 | 75 81 | 80 69 | 69
Wind 3 mph SSE 4 mph South 5 mph South 4 mph South
Humidity 93% 97% 97% 98%
Chance of Precip. 10% 10% 10% 10%
Cloud Cover 67% 74% 78% 79%
Conditions Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy
Sunrise & Sunset
5:48 AM
8:25 PM
Source: BestForecast at 6:53 PM EDT on May 22, 2012
Descriptive Forecast
Saturday
chancetstorms Clear with a chance of a thunderstorm. High of 82F with a heat index of 91F. Winds less than 5 mph. Chance of rain 20%.
Saturday Night
nt_clear Clear. Low of 63F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 65 | 65 76 | 75 80 | 77 -9998 | -9998
Wind 3 mph South 4 mph South 4 mph South -9998 mph North
Humidity 98% 94% 88% 85%
Chance of Precip. 10% 10% 10% 0%
Cloud Cover 77% % % %
Conditions Mostly Cloudy Clear Clear Clear
Sunrise & Sunset
5:48 AM
8:25 PM
Scientific Forecaster Discussion — MOS Weather Graph
Nearby
History & Almanac
May 22, 2012 Max Temp Min Temp
Normal (KIAD) 77 °F 53 °F
Record (KIAD) 88 °F (1964) 31 °F (2002)
Yesterday 70 °F 64 °F
Yesterday's Cooling Degree Days: 2
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
Tuesday Good
OZONE
Tuesday Good
PM2.5
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 72.0 °F
Baltimore, MD 71.1 °F
Solomons Island, MD 71.1 °F
Marine Forecast
Astronomy
May. 22, 2012 Rise Set
Actual Time 5:51 AM EDT 8:22 PM EDT
Civil Twilight 5:20 AM EDT 8:53 PM EDT
Nautical Twilight 4:42 AM EDT 9:31 PM EDT
Astronomical Twilight 3:59 AM EDT 10:13 PM EDT
Moon 7:00 AM EDT (5/22) 9:58 PM EDT (5/22)
Length Of Visible Light 15h 32m
Length of Day
14h 31m
Tomorrow will be 1m 30s longer.
Waxing Crescent, 4% 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
98 °F
Stafford
86 °F
Farmville
85 °F
Danville
84 °F
Martinsville
84 °F
South Hill
54 °F
Abingdon
55 °F
Richlands
55 °F
Wise
55 °F
Hot Springs
57 °F
Martinsville
Record Extremes
Snow Depth
Station Depth Elevation
No new snow has been reported.
Snow Depth Reports — Snow Depth Map
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Nearby Events
Event Date Forecast
Bob Keel and Friends 9:00 PM EDT 2012-05-22 Thunderstorm, 71°F
Bob Keel and Chelsea McBee 8:00 PM EDT 2012-05-26 Fog, 77°F
Event data courtesy eviesays.com
Aviation
City Temp. Conditions Updated
Dulles Airport 69 °F Mostly Cloudy 8:52 PM EDT
Leesburg 72 °F Scattered Clouds 8:55 PM EDT
Manassas 70 °F Clear 8:55 PM EDT
Gaithersburg 66 °F Clear 8:55 PM EDT
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Flight To ETA Status
UAL352
Tampa, FL 		KIAD 08:58PM On Time
SKW594K
San Antonio, TX 		KIAD 08:58PM On Time
UAL932
Raleigh/Durham, NC 		KIAD 08:59PM On Time
ASQ6073
New York, NY 		KIAD 08:59PM On Time
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Type Condition
Flight Rule: VFR (KIAD)
Wind Speed: 0.0 kts.
Wind Dir: 144° (SE)
Ceiling: 6000 ft

METAR KIAD 230052Z 00000KT 10SM FEW032 BKN060 BKN200 21/19 A2984 RMK AO2 SLP104 T02060189

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Sports
Event Date Forecast
Tigers vs. Indians 7:05 PM EDT on May 22, 2012 Partly Cloudy, 61 °F
Royals vs. Yankees 7:05 PM EDT on May 22, 2012 Fog, 65 °F
Braves vs. Nationals 7:05 PM EDT on June 01, 2012 Average High 82° F/ 27° C
Braves vs. Nationals 4:05 PM EDT on June 02, 2012 Average High 81° F/ 27° C
Event Date Forecast
Cartagena vs. Córdoba CF 9:00 PM CEST on May 22, 2012 Scattered Clouds, High 80° F/ 27° C
Villarreal B vs. Girona 9:00 PM CEST on May 22, 2012 Overcast, High 71° F/ 22° C
New England vs. D.C. 7:30 PM EDT on May 26, 2012 Partly Cloudy, 83 °F
Montreal vs. D.C. 7:30 PM EDT on June 30, 2012 Average High 87° F/ 30° C
Event Date Forecast
Coca-Cola 600 6:16 PM EDT on May 27, 2012 Partly Cloudy, 83 °F
FedEx 400 benefiting Autism Speaks 1:15 PM EDT on June 03, 2012 Average High 79° F/ 26° C
Event Date Forecast
Crowne Plaza Invitational at Colonial 8:30 AM CDT on May 24, 2012 Clear, 70 °F
Crowne Plaza Invitational at Colonial 8:30 AM CDT on May 25, 2012 Clear, 72 °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 72 °F 73 °F 64 °F 76% SE  at  5 mph 0.00 in / hr 339 ft 8:38 PM EDT MADIS
Ashburn Village, Ashburn, VA 71.8 °F 71 °F 66 °F 83% WNW  at  0.0 mph - / hr 320 ft 9:01 PM EDT Normal  
Brambleton, Brambleton, VA 71.7 °F 71 °F 66 °F 83% East  at  0.0 mph 0.00 in / hr 310 ft 9:05 PM EDT Rapid Fire  
Broadlands, Ashburn, VA 71.7 °F 71 °F 66 °F 82% SSE  at  1.0 mph 0.00 in / hr 391 ft 9:05 PM EDT Rapid Fire  
Falls Brook, Herndon, VA 68.6 °F - 65 °F 89% SW  at  0.0 mph 0.00 in / hr 280 ft 9:00 PM EDT Normal  
Reston - West Market, Reston, VA 71.1 °F 74 °F 62 °F 72% NW  at  0.0 mph 0.00 in / hr 430 ft 9:05 PM EDT Rapid Fire  
Weatherscience.net, Potomac Falls, VA 69.5 °F - 65 °F 86% East  at  1.2 mph 0.00 in / hr 276 ft 9:05 PM EDT Rapid Fire
Belmont Country Club, Ashburn, VA 71.9 °F 72 °F 65 °F 80% South  at  0.0 mph 0.00 in / hr 302 ft 9:05 PM EDT Rapid Fire
APRSWXNET Reston VA , Herndon, VA 70 °F - 66 °F 86% South  at  0 mph 0.00 in / hr 454 ft 8:48 PM EDT MADIS
Chantilly Highlands, Herndon, VA 68.5 °F - 68 °F 99% SE  at  3.1 mph 0.00 in / hr 340 ft 9:05 PM EDT Rapid Fire  
APRSWXNET Great Falls VA , Sterling, VA 71 °F 70 °F 66 °F 84% NNW  at  0 mph 0.00 in / hr 321 ft 8:45 PM EDT MADIS
Ridings at Blue Springs, Chantilly, VA 69.3 °F - 66 °F 90% South  at  0.0 mph 0.00 in / hr 303 ft 9:03 PM EDT Normal
Gracie's Window in FranklinGlen, Fairfax, VA 70.4 °F 70 °F 65 °F 83% SW  at  0.0 mph 2.59 in / hr 365 ft 9:05 PM EDT Rapid Fire  
Franklin Glen/KR4YO, Fairfax, VA 68.7 °F - 68 °F 96% East  at  0.7 mph 0.00 in / hr 367 ft 9:05 PM EDT Rapid Fire  
Stone Ridge, Dulles, VA 71.2 °F 74 °F 61 °F 70% NNW  at  0.0 mph 0.00 in / hr 391 ft 9:04 PM EDT Rapid Fire  
Chantilly, VA 68.0 °F - 67 °F 97% North  at  0.0 mph 0.00 in / hr 308 ft 9:05 PM EDT Rapid Fire  
Wind Power Cube, Chantilly, VA 69.4 °F - 66 °F 90% South  at  3.1 mph 0.00 in / hr 203 ft 9:05 PM EDT Rapid Fire  
Folkstone, Oak Hill, VA 68.6 °F - 67 °F 94% NE  at  0.0 mph 0.00 in / hr 375 ft 9:04 PM EDT Rapid Fire  
Cedar Cove Cluster, Reston, VA 70.5 °F 70 °F 65 °F 83% South  at  0.0 mph 0.00 in / hr 350 ft 9:05 PM EDT Rapid Fire  
Brookfield, Chantilly, VA 70.0 °F - 46 °F 43% SSW  at  0.0 mph 0.00 in / hr 260 ft 9:05 PM EDT Normal  
APRSWXNET Reston VA , Herndon, VA 70 °F - 65 °F 84% East  at  0 mph 0.00 in / hr 400 ft 8:48 PM EDT MADIS
Great Falls VA, Great Falls, VA 70.4 °F 70 °F 65 °F 82% East  at  0.0 mph - / hr 380 ft 9:01 PM EDT Normal
APRSWXNET Great Falls VA , Great Falls, VA 71 °F 72 °F 64 °F 79% East  at  0 mph 0.00 in / hr 380 ft 8:45 PM EDT MADIS
Colvin Run at Hunter Mill Rd (One Lane B, Vienna, VA 69.4 °F - 65 °F 87% ENE  at  0.0 mph 0.00 in / hr 295 ft 9:05 PM EDT Normal  
Lake Fairfax, Vienna, VA 68.9 °F - 66 °F 89% SSE  at  0.0 mph 0.00 in / hr 275 ft 9:05 PM EDT Rapid Fire
Hickory Creek, Great Falls, VA 69.6 °F - 64 °F 84% SSW  at  0.0 mph 0.00 in / hr 350 ft 9:05 PM EDT Rapid Fire
Kincaid Forest, Leesburg, VA 72.2 °F 71 °F 67 °F 84% ESE  at  0.0 mph 0.00 in / hr 294 ft 9:05 PM EDT Normal  
Hawk Ridge Subdivision, Reston, VA 68.1 °F - 65 °F 91% SW  at  0.0 mph 0.00 in / hr 300 ft 9:00 PM EDT Normal
Big Woods, Leesburg, VA 68.5 °F - 64 °F 87% NE  at  0.0 mph 0.00 in / hr 489 ft 9:04 PM EDT Normal  
APRSWXNET Great Falls V, Great Falls, VA 72 °F 73 °F 65 °F 79% NE  at  0 mph 0.00 in / hr 296 ft 8:48 PM EDT MADIS
VADOT Site_C, Oakton, VA 73 °F 74 °F 65 °F 76% North  at  - 0.00 in / hr 290 ft 8:36 PM EDT MADIS
Emerald Park Estates, Leesburg, VA 69.0 °F - 65 °F 86% South  at  0.0 mph 0.00 in / hr 444 ft 9:05 PM EDT Rapid Fire  
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Flash Flood Watch
Mobile & Email Alerts Statement as of 7:16 PM EDT on May 22, 2012

... Flash Flood Watch in effect until 6 am EDT Wednesday...

The National Weather Service in Sterling Virginia has issued a

* Flash Flood Watch for portions of northern Virginia and the
extreme eastern Panhandle of West Virginia... including the
following areas... in Virginia... Clarke... Loudoun... northern
Fauquier... Prince William/Manassas/Manassas Park and southern
Fauquier. In northeast West Virginia... Jefferson.

* Until 6 am EDT Wednesday

* showers and thunderstorms will move into the extreme eastern
Panhandle of West Virginia and northern Virginia late this
evening and overnight. Locally heavy downpours will be possible
over the same locations that received heavy rainfall on Monday
night. Consequently... it will only take an inch or less of
rainfall in an hour to produce flash flooding.

* This rainfall could cause the same creeks and streams that
flooded last night to rise out of their banks.

Precautionary/preparedness actions...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should flash flood warnings be issued.


Jrk


Local Storm Report
Mobile & Email Alerts


05/22/2012 0200 am

Round Hill, Loudoun County.

Flash flood, reported by Emergency Mngr.


            East Loudoun street down to one Lane just prior to the
            Route 7 bypass due to high water.





05/22/2012 0200 am

3 miles N of Round Hill, Loudoun County.

Flash flood, reported by Emergency Mngr.


            Appalachian trail Road at woodgrove Road is impassable
            due to high water.



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