Sterling, VA

5:43 AM EST on February 13, 2012 (GMT -0500)
Elev: 315 ft
Lon: 77.4° W
Lat: 39.0° N
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Tropical Weather: Tropical Cyclone Giovanna (South Indian Ocean) Tropical Cyclone Jasmine (Southern Pacific)
Weather Summary
Weather Underground Forecast for Monday, February 13, 2012.

The trough of low pressure that brought unsettled weather to the West on Sunday will advance into the Plains on Monday with more mixed precipitation. The trough will support a low and associated warm front moving eastward into the Southern Plains. As the system progresses, rain showers with periods of heavy rain and isolated thunderstorms will spread from parts of central/eastern Texas into western Louisiana, mixed precipitation will develop in parts of Oklahoma and Arkansas, and snow will blanket parts of the Central Plains, Mid-Mississippi Valley, and parts of the western Ohio Valley. Areas from eastern Texas through Arkansas should expect the heaviest precipitation totals. Heightened winter weather conditions will allow Winter Weather Advisories and a few Winter Storm Warnings to remain in effect through the day. Elsewhere east of the Continental Divide, lake-effect snow showers will continue along parts of the Lower Great Lakes Snowbelt.

In the West, a Pacific cold front pushing across the Pacific Northwest will drop southward across northern California, bringing coastal and valley rain and significant snowfall to the Sierra Nevadas.
Weather Underground Forecast for Monday, February 13, 2012.

The trough of low pressure that brought unsettled weather to the West on Sunday will advance into the Plains on Monday with more mixed precipitation. The trough will support a low and associated warm front moving eastward into the Southern Plains. As the system progresses, rain showers with periods of heavy rain and isolated thunderstorms will spread from parts of central/eastern Texas into western Louisiana, mixed precipitation will develop in parts of Oklahoma and Arkansas, and snow will blanket parts of the Central Plains, Mid-Mississippi Valley, and parts of the western Ohio Valley. Areas from eastern Texas through Arkansas should expect the heaviest precipitation totals. Heightened winter weather conditions will allow Winter Weather Advisories and a few Winter Storm Warnings to remain in effect through the day. Elsewhere east of the Continental Divide, lake-effect snow showers will continue along parts of the Lower Great Lakes Snowbelt.

In the West, a Pacific cold front pushing across the Pacific Northwest will drop southward across northern California, bringing coastal and valley rain and significant snowfall to the Sierra Nevadas.
Sterling Weather at a Glance
Updated 5:04 AM EST
Weather Station - report
Elevation
339 ft
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Now
Clear
Clear
Temperature
22 °F
Feels Like 14 °F
Wind(mph)
6
Sunrise / Set
7:04 AM
5:44 PM
Moon
Waning Gibbous
Today
Clear 43 °F
Clear
Tonight
Mostly Cloudy 27 °F
Mostly Cloudy
Tomorrow
Chance of Rain 47 | 34 °F
Chance of Rain
30% chance of precipitation
Wednesday
Partly Cloudy 49 | 31 °F
Partly Cloudy
Thursday
Chance of Snow 43 | 36 °F
Chance of Snow
40% chance of precipitation
Friday
Partly Cloudy 50 | 31 °F
Partly Cloudy
Today is forecast to be Much Warmer than yesterday.
Conditions
Pressure
30.18 in
Visibility
10.0 miles
Clouds
Clear -
Moisture
Humidity
58%
Rainfall
0.00 in
Snow Depth
Not available.
METAR
METAR KIAD 130952Z 23006KT 10SM CLR M06/M12 A3017 RMK AO2 SLP220 T10561122
Don't speak METAR? Read our FAQ.
Weather Radio
Temperature
Windchill
14 °F
Dew Point
10 °F
Wind
Speed / Dir
6 mph from SW
Wind Gust
9.0 mph
Health
UV
0 out of 16
Pollen
.70 out of 12
Pollen Forecast
Ozone
Good
PM2.5
Good
Flu Activity
Regional
View Flu Map
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Regional Forecast for Loudoun
Rest of the Overnight
nt_sunny Clear. Lows around 20. West winds 10 to 15 mph.
Today
sunny Sunny. Highs in the lower 40s. West winds 10 to 15 mph.
Tonight
nt_chancesnow Partly cloudy in the evening...then cloudy with a slight chance of snow showers after midnight. Lows in the mid 20s. West winds around 5 mph. Chance of snow 20 percent.
Tuesday
chancesnow Cloudy. A chance of snow or rain showers in the morning... then a chance of rain showers in the afternoon. Highs in the upper 40s. South winds 5 to 10 mph. Chance of precipitation 50 percent.
Tuesday Night
nt_snow Cloudy. A chance of rain showers in the evening... then a chance of rain or snow showers after midnight. Lows in the lower 30s. Southeast winds around 5 mph...becoming northeast around 5 mph after midnight. Chance of precipitation 50 percent.
Wednesday
partlycloudy Mostly sunny. Highs in the lower 50s.
Wednesday Night
nt_cloudy Mostly cloudy. Lows in the lower 30s.
Thursday
chancerain Cloudy with a 50 percent chance of rain. Highs in the mid 40s.
Thursday Night
nt_chancerain Mostly cloudy with a 50 percent chance of rain showers. Lows in the mid 30s.
Friday
partlysunny Partly sunny. Highs in the upper 40s.
Friday Night
nt_partlycloudy Partly cloudy. Lows around 30.
Saturday
partlycloudy Mostly sunny. Highs in the upper 40s.
Saturday Night
nt_partlycloudy Partly cloudy. Lows around 30.
Sunday
partlysunny Partly sunny. Highs in the upper 40s.
Source: NWS at 4:26 am EST on February 13, 2012
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Forecast
View Calendar 7-Day Weather Forecast for 20163
Monday, 13
Clear
43 | 27 °F
Clear
Chance of
Precipitation
0%
Tuesday, 14
Chance of Rain
47 | 34 °F
Chance of Rain
Chance of
Precipitation
30%
Wednesday, 15
Partly Cloudy
49 | 31 °F
Partly Cloudy
Chance of
Precipitation
10%
Thursday, 16
Chance of Snow
43 | 36 °F
Chance of Snow
Chance of
Precipitation
40%
Friday, 17
Partly Cloudy
50 | 31 °F
Partly Cloudy
Chance of
Precipitation
10%
Saturday, 18
Partly Cloudy
47 | 31 °F
Partly Cloudy
Chance of
Precipitation
10%
Sunday, 19
Partly Cloudy
49 | NA
Partly Cloudy
Chance of
Precipitation
10%
Source: NWS at 4:26 am EST on February 13, 2012
Regional Forecast for Loudoun
Rest of the Overnight
nt_sunny Clear. Lows around 20. West winds 10 to 15 mph.
Today
sunny Sunny. Highs in the lower 40s. West winds 10 to 15 mph.
Tonight
nt_chancesnow Partly cloudy in the evening...then cloudy with a slight chance of snow showers after midnight. Lows in the mid 20s. West winds around 5 mph. Chance of snow 20 percent.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 22 | 9 37 | 11 38 | 16 32 | 20
Wind 6 mph WNW 7 mph WNW 3 mph WSW 0 mph WNW
Humidity 56% 32% 40% 60%
Chance of Precip. 0% 0% 0% 10%
Cloud Cover 1% 0% 35% 55%
Conditions Clear Clear Partly Cloudy Partly Cloudy
Sunrise & Sunset
7:04 AM
5:44 PM
Source: NWS at 4:26 am EST on February 13, 2012
Regional Forecast for Loudoun
Tuesday
chancesnow Cloudy. A chance of snow or rain showers in the morning... then a chance of rain showers in the afternoon. Highs in the upper 40s. South winds 5 to 10 mph. Chance of precipitation 50 percent.
Tuesday Night
nt_snow Cloudy. A chance of rain showers in the evening... then a chance of rain or snow showers after midnight. Lows in the lower 30s. Southeast winds around 5 mph...becoming northeast around 5 mph after midnight. Chance of precipitation 50 percent.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 30 | 22 43 | 26 42 | 29 38 | 31
Wind 0 mph NW 7 mph SE 6 mph South 1 mph ESE
Humidity 70% 52% 58% 75%
Chance of Precip. 10% 30% 30% 30%
Cloud Cover 97% 91% 88% 88%
Conditions Overcast Chance of Rain Chance of Rain Chance of Rain
Sunrise & Sunset
7:03 AM
5:45 PM
Source: NWS at 4:26 am EST on February 13, 2012
Regional Forecast for Loudoun
Wednesday
partlycloudy Mostly sunny. Highs in the lower 50s.
Wednesday Night
nt_cloudy Mostly cloudy. Lows in the lower 30s.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 36 | 30 45 | 31 43 | 33 37 | 28
Wind 3 mph NW 10 mph NW 6 mph NW 1 mph NW
Humidity 80% 59% 66% 72%
Chance of Precip. 30% 10% 10% 10%
Cloud Cover 63% 31% 21% 36%
Conditions Chance of Snow Partly Cloudy Clear Partly Cloudy
Sunrise & Sunset
7:01 AM
5:46 PM
Source: NWS at 4:26 am EST on February 13, 2012
Regional Forecast for Loudoun
Thursday
chancerain Cloudy with a 50 percent chance of rain. Highs in the mid 40s.
Thursday Night
nt_chancerain Mostly cloudy with a 50 percent chance of rain showers. Lows in the mid 30s.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 33 | 29 39 | 33 40 | 37 38 | 38
Wind 0 mph North 4 mph NE 4 mph SSE 2 mph South
Humidity 83% 77% 93% 99%
Chance of Precip. 10% 10% 40% 40%
Cloud Cover 85% 100% 97% 97%
Conditions Mostly Cloudy Chance of Snow Chance of Rain Chance of Rain
Sunrise & Sunset
7:00 AM
5:47 PM
Source: NWS at 4:26 am EST on February 13, 2012
Regional Forecast for Loudoun
Friday
partlysunny Partly sunny. Highs in the upper 40s.
Friday Night
nt_partlycloudy Partly cloudy. Lows around 30.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 38 | 35 47 | 34 44 | 32 37 | 29
Wind 2 mph WSW 7 mph WNW 6 mph WNW 4 mph WNW
Humidity 90% 63% 64% 73%
Chance of Precip. 30% 30% 10% 10%
Cloud Cover 76% 53% 53% 48%
Conditions Chance of Rain Partly Cloudy Partly Cloudy Partly Cloudy
Sunrise & Sunset
6:59 AM
5:48 PM
Source: NWS at 4:26 am EST on February 13, 2012
Regional Forecast for Loudoun
Saturday
partlycloudy Mostly sunny. Highs in the upper 40s.
Saturday Night
nt_partlycloudy Partly cloudy. Lows around 30.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 33 | 27 43 | 27 41 | 27 37 | 27
Wind 4 mph WNW 7 mph WNW 5 mph WNW 3 mph WNW
Humidity 77% 51% 55% 67%
Chance of Precip. 10% 10% 10% 10%
Cloud Cover 41% 35% 47% 47%
Conditions Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy
Sunrise & Sunset
6:59 AM
5:48 PM
Source: NWS at 4:26 am EST on February 13, 2012
Regional Forecast for Loudoun
Sunday
partlysunny Partly sunny. Highs in the upper 40s.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 34 | 25 45 | 27 42 | 27 37 | 27
Wind 2 mph WNW 5 mph WNW 4 mph WNW 3 mph WNW
Humidity 69% 49% 55% 67%
Chance of Precip. 10% 10% 10% 10%
Cloud Cover 52% 57% 39% 47%
Conditions Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy
Sunrise & Sunset
6:59 AM
5:48 PM
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Nearby
History & Almanac
February 13, 2012 Max Temp Min Temp
Normal (KIAD) 45 °F 24 °F
Record (KIAD) 65 °F (1974) -8 °F (1983)
Yesterday 31 °F 20 °F
Yesterday's Heating Degree Days: 39
Choose a date
Earthquake Activity
City Distance Mag. Time & Date
No recent earthquake activity has been reported nearby.
Minimum magnitude displayed is 2.5.
Air Quality
  Air Quality AQ Index Pollutant
Yesterday Good
PM10
Yesterday Good
OZONE
Current Good
PM2.5
Current Good
OZONE
Monday Good
PM2.5
Tuesday Good
PM2.5
Wednesday Moderate
PM2.5
Coastal Water Temperatures
Place Temperature
Washington, DC 41.0 °F
Baltimore, MD 41.0 °F
Solomons Island, MD 41.0 °F
Astronomy
Feb. 13, 2012 Rise Set
Actual Time 7:04 AM EST 5:44 PM EST
Civil Twilight 6:36 AM EST 6:11 PM EST
Nautical Twilight 6:05 AM EST 6:43 PM EST
Astronomical Twilight 5:34 AM EST 7:14 PM EST
Moon No Moon Rise 10:05 AM EST
Length Of Visible Light 11h 35m
Length of Day
10h 40m
Tomorrow will be 2m 20s longer.
Waning Gibbous, 64% of the Moon is Illuminated
Today
Waning Gibbous
Feb 14
Last Quarter
Feb 21
New
Feb 29
First Quarter
Mar 8
Full
Today's Extremes
State Highs State Lows
33 °F
Martinsville
30 °F
Melfa
30 °F
Roanoke
30 °F
Farmville
28 °F
Lynchburg
14 °F
Stafford
15 °F
Manassas
15 °F
Tappahannock
15 °F
Louisa
15 °F
Hot Springs
Source: NWS
Snow Depth
Station Depth Elevation
No new snow has been reported.
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Travel & Activities
Travel Planning
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Aviation
City Temp. Conditions Updated
Dulles Airport 22 °F Clear 4:52 AM EST
Leesburg 28 °F Clear 5:35 AM EST
Manassas 16 °F Clear 5:35 AM EST
Gaithersburg 25 °F Clear 5:35 AM EST
Flight To ETA Status
UAL991
Accra
KIAD 05:51AM On Time
UAL276
San Francisco, CA
KIAD 06:03AM On Time
UAL977
Dubai
KIAD 06:10AM On Time
SAA207
Yoff
KIAD 06:10AM On Time
Flight Tracker by FlightAware FlightAware
Type Condition
Flight Rule: VFR (KIAD)
Wind Speed: 6.0 kts.
Wind Dir: 215° (SW)
Ceiling: Unlimited

METAR KIAD 130952Z 23006KT 10SM CLR M06/M12 A3017 RMK AO2 SLP220 T10561122

Nearby Events
Event Date Forecast
Vision Night | Oakton 7:00 PM EST 2012-02-13 Overcast, 37°F
SharePoint 2010 Super User Week | February 13-17, 2012 9:00 AM EST 2012-02-13 Clear, 27°F
Walk, Run/Walk, and Run Intervals Training 9:00 AM EST 2012-02-13 Clear, 27°F
Learn to Run 2:00 PM EST 2012-02-13 Clear, 41°F
Dan Fisk 8:00 PM EST 2012-02-14 Chance of Rain, 40°F
Showcase - Folk Club of Reston/Herndon 7:00 PM EST 2012-02-14 Chance of Rain, 41°F
Event data courtesy eviesays.com
Sports
Event Date Forecast
Budweiser Shootout 8:29 PM EST on February 18, 2012 Partly Cloudy, 59 °F
Gatorade Duel 1 2:19 PM EST on February 23, 2012 Average High 70° F/ 21° C
Event Date Forecast
Northern Trust Open 8:30 AM PST on February 16, 2012 Clear, 63 °F
Northern Trust Open 8:30 AM PST on February 17, 2012 Clear, 63 °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
Weather Stations
Station Location Temp. Windchill Dew Point Humidity Wind Precipitation Elevation Updated Type Website
VADOT Site_G, Herndon, VA 22 °F 14 °F 10 °F 58% SW  at  6 mph 0.00 in / hr 339 ft 5:04 AM EST MADIS
Ashburn Village, Ashburn, VA 21.0 °F 21 °F 14 °F 73% North  at  0.0 mph 0.00 in / hr 282 ft 5:43 AM EST Rapid Fire  
Ashburn Village, Ashburn, VA 21.7 °F 22 °F 14 °F 71% NW  at  0.0 mph - / hr 320 ft 5:37 AM EST Normal  
APRSWXNET Ashburn VA , Ashburn, VA 21 °F 21 °F 14 °F 73% North  at  0 mph 0.00 in / hr 259 ft 5:17 AM EST MADIS
Broadlands, Ashburn, VA 26.3 °F 26 °F 15 °F 61% WSW  at  1.0 mph 0.00 in / hr 391 ft 5:43 AM EST Rapid Fire  
Ashburn Village 1, Ashburn, VA 24.6 °F 25 °F 12 °F 57% SW  at  0.0 mph 0.00 in / hr 279 ft 5:43 AM EST Rapid Fire  
Falls Brook, Herndon, VA 20.1 °F 20 °F 14 °F 77% WNW  at  0.0 mph 0.00 in / hr 280 ft 5:33 AM EST Normal  
Monterey Estates, Herndon, VA 20.9 °F 21 °F 12 °F 68% SSE  at  2.3 mph 0.00 in / hr 390 ft 5:43 AM EST Rapid Fire
Weatherscience.net, Potomac Falls, VA 23.9 °F 24 °F 14 °F 65% West  at  0.0 mph 0.00 in / hr 276 ft 5:43 AM EST Rapid Fire
Reston - West Market, Reston, VA 21.2 °F 21 °F 10 °F 62% West  at  0.0 mph 0.00 in / hr 430 ft 5:43 AM EST Rapid Fire  
APRSWXNET Reston VA , Herndon, VA 24 °F 24 °F 14 °F 65% SW  at  0 mph 0.00 in / hr 454 ft 5:18 AM EST MADIS
Belmont Country Club, Ashburn, VA 25.8 °F 26 °F 14 °F 61% West  at  2.8 mph 0.00 in / hr 302 ft 5:43 AM EST Rapid Fire
Broad Run, Potomac Falls, VA 22.6 °F 23 °F 16 °F 74% WSW  at  1.0 mph 0.00 in / hr 111 ft 5:43 AM EST Rapid Fire  
Chantilly Highlands, Herndon, VA 19.8 °F 20 °F 8 °F 60% SE  at  1.6 mph 0.00 in / hr 340 ft 5:43 AM EST Rapid Fire  
APRSWXNET Great Falls VA , Sterling, VA 24 °F 24 °F 15 °F 67% WNW  at  0 mph 0.00 in / hr 321 ft 5:11 AM EST MADIS
Belmont Chase, Ashburn, VA 24.1 °F 24 °F 14 °F 65% NW  at  0.4 mph 0.00 in / hr 318 ft 5:41 AM EST Normal  
Golf Course Island, Reston, VA 22.7 °F 23 °F 12 °F 62% West  at  0.0 mph 0.00 in / hr 390 ft 5:43 AM EST Rapid Fire  
Ridings at Blue Springs, Chantilly, VA 20.4 °F 20 °F 13 °F 73% SSE  at  0.0 mph 0.00 in / hr 303 ft 5:42 AM EST Normal
Gracie's Window in FranklinGlen, Fairfax, VA 20.3 °F 20 °F 10 °F 65% SSW  at  1.1 mph 0.00 in / hr 365 ft 5:40 AM EST Rapid Fire  
Franklin Glen/KR4YO, Fairfax, VA 19.6 °F 20 °F 9 °F 63% West  at  0.0 mph 0.00 in / hr 358 ft 5:43 AM EST Rapid Fire  
Stone Ridge, Dulles, VA 21.2 °F 21 °F 6 °F 51% NNW  at  0.0 mph 0.00 in / hr 391 ft 5:43 AM EST Rapid Fire  
Hunt Club, Reston, VA 22.3 °F 22 °F -5 °F 29% SW  at  1.1 mph 0.00 in / hr 319 ft 5:43 AM EST Rapid Fire  
Chantilly, VA 17.8 °F 18 °F 11 °F 75% North  at  0.0 mph 0.00 in / hr 308 ft 5:43 AM EST Rapid Fire  
Cedar Cove Cluster, Reston, VA 25.0 °F 25 °F 15 °F 64% SW  at  0.0 mph 0.00 in / hr 350 ft 5:43 AM EST Rapid Fire  
Brookfield, Chantilly, VA 21.4 °F 21 °F -4 °F 32% SSW  at  0.0 mph 0.00 in / hr 260 ft 5:42 AM EST Normal  
APRSWXNET Reston VA , Herndon, VA 24 °F 24 °F 13 °F 63% SW  at  3 mph 0.00 in / hr 400 ft 5:02 AM EST MADIS
APRSWXNET Great Falls VA , Great Falls, VA 23 °F 23 °F 12 °F 61% North  at  - 0.00 in / hr 380 ft 5:17 AM EST MADIS
Fox Mill, Herndon, VA 21.8 °F 22 °F 14 °F 70% SW  at  0.0 mph 0.00 in / hr 383 ft 5:43 AM EST Rapid Fire  
Colvin Run at Hunter Mill Rd (One Lane B, Vienna, VA 24.0 °F 24 °F 12 °F 61% SW  at  1.0 mph 0.00 in / hr 295 ft 5:40 AM EST Normal  
Hickory Creek, Great Falls, VA 23.2 °F 23 °F 11 °F 60% West  at  0.0 mph 0.00 in / hr 350 ft 5:43 AM EST Rapid Fire
Lake Fairfax, Vienna, VA 22.2 °F 22 °F 13 °F 66% SSW  at  2.0 mph 0.00 in / hr 275 ft 5:43 AM EST Rapid Fire
Kincaid Forest, Leesburg, VA 27.9 °F 28 °F 17 °F 63% West  at  0.0 mph 0.00 in / hr 294 ft 5:40 AM EST Normal  
Hawk Ridge Subdivision, Reston, VA 19.1 °F 19 °F 12 °F 75% SSE  at  0.0 mph 0.00 in / hr 300 ft 5:40 AM EST Normal
Big Woods, Leesburg, VA 24.3 °F 24 °F 13 °F 61% WNW  at  0.0 mph 0.00 in / hr 489 ft 5:43 AM EST Normal  
APRSWXNET Great Falls V, Great Falls, VA 23 °F 23 °F 13 °F 64% SSW  at  0 mph 0.00 in / hr 296 ft 5:05 AM EST MADIS
Emerald Park Estates, Leesburg, VA 26.5 °F 22 °F 14 °F 58% SSW  at  4.0 mph 0.00 in / hr 444 ft 5:35 AM EST Rapid Fire  
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