McLean, VA

5:31 PM EST on February 14, 2012 (GMT -0500)
Elev: 292 ft
Lon: 77.2° W
Lat: 38.9° N
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Tropical Weather: Tropical Cyclone Giovanna (South Indian Ocean) Tropical Cyclone Thirteen (South Indian Ocean) Tropical Cyclone Jasmine (Southern Pacific)
Weather Summary
Jessica Parker
Weather Underground Forecast for Tuesday, February 14, 2012. Valentine's Day will be greeted by a storm that will begin the day in the Mississippi Valley before moving eastward into the eastern third of the country. In the colder air to the north, snow is expected to fall through the Ohio Valley before moving into the Northeast in the evening. The warmer air to the north will only allow areas of light to moderate rain to form from Louisiana through the Carolinas. By the end of the day, much of the precipitation from this storm will be off the eastern seaboard, leaving warmer air in the Southern Plains and much colder air in the Northern Plains and Upper Midwest.

In the West, a storm will track through the Great Basin before slamming into the Rockies, where it will produce much needed high elevation snow. This will not be a tremendous snow producer, but several inches of the white stuff is expected.

Late in the day, a Pacific storm will make its approach to the West Coast. As the storm moves inland, it will instigate rain and high elevation snow in Washington and Oregon. This storm will be the next rain producer for California on Wednesday.

The Northeast will rise in to the 30s and 40s, while the Southeast will see temperatures in the 50s, 60s, and 70s. The Northern Plains will rise into the 30s and 40s, while the Northwest will see temperatures in the 30s and 40s.
Weather Underground Forecast for Tuesday, February 14, 2012. Valentine's Day will be greeted by a storm that will begin the day in the Mississippi Valley before moving eastward into the eastern third of the country. In the colder air to the north, snow is expected to fall through the Ohio Valley before moving into the Northeast in the evening. The warmer air to the north will only allow areas of light to moderate rain to form from Louisiana through the Carolinas. By the end of the day, much of the precipitation from this storm will be off the eastern seaboard, leaving warmer air in the Southern Plains and much colder air in the Northern Plains and Upper Midwest.

In the West, a storm will track through the Great Basin before slamming into the Rockies, where it will produce much needed high elevation snow. This will not be a tremendous snow producer, but several inches of the white stuff is expected.

Late in the day, a Pacific storm will make its approach to the West Coast. As the storm moves inland, it will instigate rain and high elevation snow in Washington and Oregon. This storm will be the next rain producer for California on Wednesday.

The Northeast will rise in to the 30s and 40s, while the Southeast will see temperatures in the 50s, 60s, and 70s. The Northern Plains will rise into the 30s and 40s, while the Northwest will see temperatures in the 30s and 40s.
Weather Underground Broadcast Network
McLean Weather at a Glance
Updated 12:35 PM EST - This station is not reporting!
Weather Station
College Park (KCGS)
Elevation
49 ft
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Now
Scattered Clouds
Scattered Clouds
Temperature
52 °F
Feels Like 52 °F
Wind(mph)
5
Sunrise / Set
7:01 AM
5:44 PM
Moon
Waning Gibbous
Tonight
Chance of Rain 36 °F
Chance of Rain
20% chance of precipitation
Tomorrow
Partly Cloudy 54 °F
Partly Cloudy
Tomorrow Night
Chance of Rain 37 °F
Chance of Rain
20% chance of precipitation
Thursday
Rain 46 | 36 °F
Rain
80% chance of precipitation
Friday
Clear 52 | 34 °F
Clear
Saturday
Partly Cloudy 54 | 36 °F
Partly Cloudy
Tomorrow is forecast to be nearly the same temperature as today.
Conditions
Pressure
29.99 in
Visibility
10.0 miles
Clouds
Scattered Clouds 6500 ft
Scattered Clouds 10000 ft
Scattered Clouds 12000 ft
Moisture
Humidity
33%
Rainfall
0.00 in
Snow Depth
Not available.
METAR
METAR KCGS 141735Z AUTO 22004KT 10SM SCT065 SCT100 SCT120 11/M05 A2999 RMK AO1
Don't speak METAR? Read our FAQ.
Weather Radio
Launch Weather Radio
Temperature
Temperature
52 °F
Dew Point
23 °F
Wind
Speed / Dir
5 mph from SW
Wind Gust
Health
UV
4 out of 16
Pollen
1.30 out of 12
Pollen Forecast
Ozone
Good
PM2.5
Moderate
Flu Activity
Regional
View Flu Map
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Source: BestForecast
Descriptive Forecast
Tuesday
chancerain Overcast with a chance of rain. High of 54F. Winds from the South at 5-10 mph. Chance of rain 20%.
Tuesday Night
nt_chancerain Overcast with a chance of rain in the evening, then mostly cloudy. Low of 36F. Winds less than 5 mph. Chance of rain 20%.
Wednesday
partlycloudy Mostly cloudy in the morning, then partly cloudy. High of 54F. Winds from the WNW at 10-15 mph.
Wednesday Night
nt_chancerain Clear in the evening, then overcast with a chance of rain. Low of 37F. Winds from the SE at 5-15 mph. Chance of rain 20%.
Thursday
rain Overcast with rain. High of 46F. Winds from the SE at 10-15 mph. Chance of rain 80%.
Thursday Night
nt_fog Mostly cloudy in the evening, then partly cloudy. Fog overnight. Low of 36F. Winds from the NW at 5-10 mph. Chance of rain 20%.
Friday
clear Clear. High of 52F. Winds from the WNW at 5-10 mph.
Friday Night
nt_partlycloudy Partly cloudy in the evening, then clear. Low of 34F. Winds from the NW at 5-10 mph.
Saturday
partlycloudy Partly cloudy. High of 54F. Winds from the WNW at 5-10 mph.
Saturday Night
nt_partlycloudy Partly cloudy. Fog overnight. Low of 36F. Winds from the WNW at 5-10 mph.
Sunday
partlycloudy Partly cloudy. Fog early. High of 43F. Winds from the NNW at 10-15 mph.
Sunday Night
nt_partlycloudy Partly cloudy. Low of 28F. Winds less than 5 mph.
Monday
clear Clear. High of 46F. Winds less than 5 mph.
Monday Night
nt_partlycloudy Partly cloudy. Low of 30F. Winds less than 5 mph.
Tuesday
clear Clear. High of 48F. Winds less than 5 mph.
Tuesday Night
nt_clear Partly cloudy. Low of 36F. Winds less than 5 mph.
Wednesday
partlycloudy Partly cloudy. High of 46F. Winds less than 5 mph.
Wednesday Night
nt_chancerain Mostly cloudy with a chance of rain. Low of 36F. Winds less than 5 mph. Chance of rain 20%.
Thursday
chancerain Mostly cloudy with a chance of rain. High of 52F. Winds less than 5 mph. Chance of rain 20%.
Thursday Night
nt_mostlycloudy Mostly cloudy. Low of 37F. Winds less than 5 mph.
Friday
chancetstorms Mostly cloudy with a chance of a thunderstorm. High of 54F. Winds less than 5 mph. Chance of rain 40% with rainfall amounts near 0.2 in. possible.
Friday Night
nt_chancerain Partly cloudy with a chance of rain. Low of 37F. Winds less than 5 mph. Chance of rain 40% with rainfall amounts near 0.2 in. possible.
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Nowcast as of 4:25 PM EST on February 14, 2012
Look for scattered sprinkles across the Baltimore Washington metropolitan area through 6pm. Overall...expect cloudy...dry and mild conditions across the area for the late afternoon.
Forecast
View Calendar 10-Day Weather Forecast for station KCGS
Tuesday, 14
Chance of Rain
54 | 36 °F
Chance of Rain
Chance of
Precipitation
20%
Wednesday, 15
Partly Cloudy
54 | 37 °F
Partly Cloudy
Chance of
Precipitation
0%
Thursday, 16
Rain
46 | 36 °F
Rain
Chance of
Precipitation
80%
Friday, 17
Clear
52 | 34 °F
Clear
Chance of
Precipitation
0%
Saturday, 18
Partly Cloudy
54 | 36 °F
Partly Cloudy
Chance of
Precipitation
0%
Sunday, 19
Fog
43 | 28 °F
Fog
Chance of
Precipitation
0%
Monday, 20
Clear
46 | 30 °F
Clear
Chance of
Precipitation
0%
Tuesday, 21
Clear
48 | 36 °F
Clear
Chance of
Precipitation
0%
Source: BestForecast
Descriptive Forecast
Tuesday
chancerain Overcast with a chance of rain. High of 54F. Winds from the South at 5-10 mph. Chance of rain 20%.
Tuesday Night
nt_chancerain Overcast with a chance of rain in the evening, then mostly cloudy. Low of 36F. Winds less than 5 mph. Chance of rain 20%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 32 | 23 44 | 22 46 | 34 39 | 37
Wind 4 mph SSW 8 mph South 6 mph SSW 2 mph SSW
Humidity 70% 40% 65% 89%
Chance of Precip. 10% 20% 20% 20%
Cloud Cover 100% 100% 46% 99%
Conditions Overcast Chance of Rain Chance of Rain Chance of Rain
Sunrise & Sunset
7:01 AM
5:44 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [2.64], Average RMSE [2.48]
The NDFD forecast quality is good. MaxT RMSE [2.21], Average RMSE [2.36]
Source: BestForecast
Descriptive Forecast
Wednesday
partlycloudy Mostly cloudy in the morning, then partly cloudy. High of 54F. Winds from the WNW at 10-15 mph.
Wednesday Night
nt_chancerain Clear in the evening, then overcast with a chance of rain. Low of 37F. Winds from the SE at 5-15 mph. Chance of rain 20%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 37 | 34 50 | 33 45 | 33 39 | 35
Wind 1 mph North 11 mph NW 4 mph NW 9 mph NNE
Humidity 83% 52% 62% 85%
Chance of Precip. 20% 10% 0% 20%
Cloud Cover 12% 47% 54% 23%
Conditions Clear Partly Cloudy Partly Cloudy Clear
Sunrise & Sunset
7:00 AM
5:45 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.10], Average RMSE [3.07]
The NDFD forecast quality is fair. MaxT RMSE [2.78], Average RMSE [2.68]
Source: BestForecast
Descriptive Forecast
Thursday
rain Overcast with rain. High of 46F. Winds from the SE at 10-15 mph. Chance of rain 80%.
Thursday Night
nt_fog Mostly cloudy in the evening, then partly cloudy. Fog overnight. Low of 36F. Winds from the NW at 5-10 mph. Chance of rain 20%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 41 | 37 46 | 35 46 | 42 45 | 41
Wind 6 mph SSW 9 mph SSE 4 mph SSE 5 mph WSW
Humidity 85% 64% 86% 87%
Chance of Precip. 20% 60% 70% 0%
Cloud Cover 100% 77% 96% 77%
Conditions Chance of Rain Rain Rain Fog
Sunrise & Sunset
6:59 AM
5:46 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [5.12], Average RMSE [4.06]
The NDFD forecast quality is poor. MaxT RMSE [4.09], Average RMSE [3.07]
Source: BestForecast
Descriptive Forecast
Friday
clear Clear. High of 52F. Winds from the WNW at 5-10 mph.
Friday Night
nt_partlycloudy Partly cloudy in the evening, then clear. Low of 34F. Winds from the NW at 5-10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 38 | 31 48 | 28 47 | 32 38 | 28
Wind 7 mph WNW 10 mph WNW 7 mph West 7 mph WNW
Humidity 76% 47% 56% 64%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 43% 6% 9% 59%
Conditions Partly Cloudy Clear Clear Partly Cloudy
Sunrise & Sunset
6:58 AM
5:47 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [5.51], Average RMSE [5.44]
The NDFD forecast quality is poor. MaxT RMSE [4.34], Average RMSE [3.24]
Source: BestForecast
Descriptive Forecast
Saturday
partlycloudy Partly cloudy. High of 54F. Winds from the WNW at 5-10 mph.
Saturday Night
nt_partlycloudy Partly cloudy. Fog overnight. Low of 36F. Winds from the WNW at 5-10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 35 | 24 47 | 25 48 | 27 38 | 27
Wind 3 mph WNW 8 mph West 6 mph WNW 6 mph WNW
Humidity 66% 40% 46% 63%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 14% 59% 37% 53%
Conditions Clear Partly Cloudy Partly Cloudy Partly Cloudy
Sunrise & Sunset
6:56 AM
5:48 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.73], Average RMSE [4.43]
The NDFD forecast quality is poor. MaxT RMSE [4.68], Average RMSE [3.65]
Source: BestForecast
Descriptive Forecast
Sunday
partlycloudy Partly cloudy. Fog early. High of 43F. Winds from the NNW at 10-15 mph.
Sunday Night
nt_partlycloudy Partly cloudy. Low of 28F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 36 | 26 42 | 42 40 | 38 33 | 20
Wind 2 mph West 11 mph NE 3 mph NNW 4 mph NNW
Humidity 67% 94% 92% 57%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 16% 54% 24% 29%
Conditions Fog Fog Fog Partly Cloudy
Sunrise & Sunset
6:56 AM
5:48 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [5.67], Average RMSE [4.99]
The NDFD forecast quality is poor. MaxT RMSE [5.32], Average RMSE [4.30]
Source: BestForecast
Descriptive Forecast
Monday
clear Clear. High of 46F. Winds less than 5 mph.
Monday Night
nt_partlycloudy Partly cloudy. Low of 30F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 33 | 23 44 | 20 44 | 25 35 | 25
Wind 3 mph NNW 4 mph North 2 mph NNW 1 mph South
Humidity 68% 40% 49% 68%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 8% 18% 9% 26%
Conditions Clear Clear Clear Partly Cloudy
Sunrise & Sunset
6:56 AM
5:48 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [6.05], Average RMSE [5.36]
The NDFD forecast quality is poor. MaxT RMSE [5.25], Average RMSE [4.21]
Source: BestForecast
Descriptive Forecast
Tuesday
clear Clear. High of 48F. Winds less than 5 mph.
Tuesday Night
nt_clear Partly cloudy. Low of 36F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 31 | 20 44 | 19 45 | 28 38 | 31
Wind 3 mph North 4 mph NE 2 mph SSE 3 mph South
Humidity 63% 37% 54% 76%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 36% 3% 19% 2%
Conditions Partly Cloudy Clear Clear Clear
Sunrise & Sunset
6:56 AM
5:48 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [6.92], Average RMSE [5.37]
Source: BestForecast
Descriptive Forecast
Wednesday
partlycloudy Partly cloudy. High of 46F. Winds less than 5 mph.
Wednesday Night
nt_chancerain Mostly cloudy with a chance of rain. Low of 36F. Winds less than 5 mph. Chance of rain 20%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 36 | 29 44 | 29 42 | 31 39 | 37
Wind 3 mph SSW 3 mph SE 2 mph South 2 mph WSW
Humidity 77% 55% 65% 92%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 29% 9% 18% 83%
Conditions Partly Cloudy Clear Clear Mostly Cloudy
Sunrise & Sunset
6:56 AM
5:48 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [6.05], Average RMSE [5.46]
Source: BestForecast
Descriptive Forecast
Thursday
chancerain Mostly cloudy with a chance of rain. High of 52F. Winds less than 5 mph. Chance of rain 20%.
Thursday Night
nt_mostlycloudy Mostly cloudy. Low of 37F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 36 | 36 46 | 44 48 | 45 42 | 38
Wind 1 mph WNW 1 mph ENE 2 mph South 3 mph SW
Humidity 94% 90% 85% 87%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 91% 90% 79% 75%
Conditions Overcast Overcast Mostly Cloudy Mostly Cloudy
Sunrise & Sunset
6:56 AM
5:48 PM
Source: BestForecast
Descriptive Forecast
Friday
chancetstorms Mostly cloudy with a chance of a thunderstorm. High of 54F. Winds less than 5 mph. Chance of rain 40% with rainfall amounts near 0.2 in. possible.
Friday Night
nt_chancerain Partly cloudy with a chance of rain. Low of 37F. Winds less than 5 mph. Chance of rain 40% with rainfall amounts near 0.2 in. possible.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 38 | 35 48 | 46 50 | 48 43 | 41
Wind 2 mph SW 1 mph SSE 4 mph SSW 3 mph SW
Humidity 89% 91% 94% 93%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 80% 86% 92% %
Conditions Mostly Cloudy Mostly Cloudy Overcast Clear
Sunrise & Sunset
6:56 AM
5:48 PM
Scientific Forecaster Discussion — MOS Weather Graph
Nearby
Active Notice: Public Information Statement  (US Severe Weather)
History & Almanac
February 14, 2012 Max Temp Min Temp
Normal (KDCA) 46 °F 29 °F
Record (KDCA) 73 °F (1990) 4 °F (1905)
Yesterday 50 °F 24 °F
Yesterday's Heating Degree Days: 28
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
Wednesday Moderate
PM2.5
Thursday Good
PM2.5
Friday Good
PM2.5
Coastal Water Temperatures
Place Temperature
Washington, DC 41.0 °F
Baltimore, MD 42.1 °F
Solomons Island, MD 42.1 °F
Marine Forecast
Astronomy
Feb. 14, 2012 Rise Set
Actual Time 7:01 AM EST 5:44 PM EST
Civil Twilight 6:34 AM EST 6:11 PM EST
Nautical Twilight 6:03 AM EST 6:43 PM EST
Astronomical Twilight 5:32 AM EST 7:14 PM EST
Moon 12:43 AM EST 10:49 AM EST
Length Of Visible Light 11h 37m
Length of Day
10h 42m
Tomorrow will be 2m 21s longer.
Waning Gibbous, 48% of the Moon is Illuminated
Today
Waning Gibbous
Feb 21
New
Feb 29
First Quarter
Mar 8
Full
Mar 14
Last Quarter
Visit Astronomy
Today's Extremes
State Highs State Lows
59 °F
Warrenton
59 °F
Suffolk
59 °F
West Point
59 °F
Williamsburg
57 °F
Chesapeake
30 °F
Manassas
31 °F
Dulles Airport
32 °F
Hot Springs
32 °F
Wise
32 °F
Winchester
Source: NWS
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
Yasmin Levy 8:00 PM EST 2012-02-14 Chance of Rain, 44°F
Flamenco Night at Plaza del Sol 7:00 PM EST 2012-02-14 Chance of Rain, 45°F
IS IT REALLY SO STRANGE? A Morrissey / Smiths Valentine! 8:00 PM EST 2012-02-14 Chance of Rain, 44°F
Showcase - Folk Club of Reston/Herndon 7:00 PM EST 2012-02-14 Chance of Rain, 45°F
Your Social Mind - the Communication, Motivation & Reward Center -- Discussion 6:00 PM EST 2012-02-14 Chance of Rain, 46°F
Dart Night 8:00 PM EST 2012-02-14 Chance of Rain, 44°F
Event data courtesy eviesays.com
Aviation
City Temp. Conditions Updated
Washington 50 °F Overcast 4:52 PM EST
College Park This station is not reporting.
Fort Belvoir 53 °F Mostly Cloudy 4:55 PM EST
Dulles Airport 50 °F Mostly Cloudy 4:52 PM EST
View all Aviation Tools
Flight To ETA Status
TCF5921
New York, NY 		KDCA 05:26PM On Time
DAL1982
Memphis, TN 		KDCA 05:28PM On Time
EGF4568
Nashville, TN 		KDCA 05:34PM On Time
COM2942
Covington, KY 		KDCA 05:36PM On Time
SWA711
Chicago, IL 		KIAD 05:31PM On Time
UAL316
Denver, CO 		KIAD 05:31PM On Time
AAL1720
Dallas-Fort Worth, TX 		KIAD 05:33PM On Time
BAW265
London, England 		KIAD 05:35PM On Time
Flight Tracker by FlightAware FlightAware
View U.S. Airport Delays
Type Condition
Flight Rule: VFR (KCGS)
Wind Speed: 4.0 kts.
Wind Dir: 220° (SW)
Ceiling: Unlimited

METAR KCGS 141735Z AUTO 22004KT 10SM SCT065 SCT100 SCT120 11/M05 A2999 RMK AO1

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Sports
Event Date Forecast
Budweiser Shootout 8:29 PM EST on February 18, 2012 Chance of Rain, 70 °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, 45 °F
Northern Trust Open 8:30 AM PST on February 17, 2012 Clear, 65 °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. Windchill Dew Point Humidity Wind Precipitation Elevation Updated Type Website
APRSWXNET McLean VA , McLean, VA 48 °F 48 °F 39 °F 71% SE  at  0 mph 0.00 in / hr 265 ft 5:02 PM EST MADIS
Langley Fork Park, McLean, VA 48.5 °F 48 °F 38 °F 68% South  at  0.0 mph 0.00 in / hr 272 ft 5:31 PM EST Rapid Fire  
Arlington, Arlington, VA 51.8 °F - 31 °F 44% SSE  at  0.0 mph 0.00 in / hr 344 ft 5:31 PM EST Rapid Fire  
Falls Church, Falls Church, VA 49.2 °F 49 °F 35 °F 58% SE  at  0.0 mph 0.00 in / hr 394 ft 5:30 PM EST Normal  
APRSWXNET Arlington VA , Arlington, VA 53 °F - 32 °F 45% South  at  2 mph 0.00 in / hr 318 ft 4:57 PM EST MADIS
Arlington, VA 50.0 °F - 31 °F 48% South  at  2.0 mph 0.00 in / hr 300 ft 5:22 PM EST Normal  
Palisades, Washington, DC 52.0 °F - 26 °F 36% North  at  0.0 mph 0.00 in / hr 211 ft 5:27 PM EST Normal  
Bethesda, Bethesda, MD 50.4 °F - 37 °F 61% North  at  0.0 mph 0.00 in / hr 236 ft 5:31 PM EST Rapid Fire  
Brookdale, Bethesda, MD 49.0 °F 49 °F 31 °F 50% SW  at  0.0 mph 0.00 in / hr 262 ft 5:30 PM EST Rapid Fire  
Falls Church-Westwood Park, Falls Church, VA 51.0 °F - 30 °F 45% SSE  at  1.0 mph 0.00 in / hr 413 ft 5:30 PM EST Rapid Fire  
Somerset, Chevy Chase, MD 49.8 °F 50 °F 34 °F 54% South  at  0.0 mph 0.00 in / hr 330 ft 5:30 PM EST Normal
Ward Circle, Washington, DC 50.6 °F - 32 °F 48% South  at  0.0 mph 0.00 in / hr 397 ft 5:29 PM EST Normal
Cherrydale, Arlington, VA 51.4 °F - 33 °F 49% SW  at  1.0 mph 0.00 in / hr 265 ft 5:30 PM EST Normal  
Backyard Weather, Falls Church, VA 51.5 °F - 30 °F 44% SW  at  1.0 mph 0.00 in / hr 334 ft 5:24 PM EST Normal  
Ashton Heights, Arlington, VA 52.5 °F - 36 °F 53% South  at  1.6 mph 0.00 in / hr 302 ft 5:30 PM EST Normal
Ashton Heights, Arlington, VA 51.7 °F - 29 °F 41% SW  at  2.0 mph 0.00 in / hr 258 ft 5:30 PM EST Normal  
Westlawn, Falls Church, VA 51.1 °F - 29 °F 43% SSW  at  1.0 mph 0.00 in / hr 331 ft 5:31 PM EST Normal
NE Vienna, Vienna, VA 47.9 °F 48 °F 37 °F 67% SSW  at  0.0 mph - / hr 322 ft 5:29 PM EST Normal  
APRSWXNET Bethesda MD , Washington, DC 51 °F - 31 °F 47% SSW  at  0 mph 0.00 in / hr 403 ft 4:58 PM EST MADIS
Broyhill Park, Falls Church, VA 49.6 °F 50 °F 29 °F 44% West  at  0.0 mph 0.00 in / hr 295 ft 5:30 PM EST Rapid Fire  
Barcroft Neighborhood, Arlington, VA 51.9 °F - 28 °F 40% SE  at  2.0 mph 0.00 in / hr 200 ft 5:31 PM EST Rapid Fire  
MDDOT I-495 @ Connecticut Ave, Bethesda, MD 50 °F - 32 °F 50% East  at  0 mph 0.00 in / hr 230 ft 5:11 PM EST MADIS
APRSWXNET Great Falls V, Great Falls, VA 51 °F - 31 °F 46% South  at  1 mph 0.00 in / hr 296 ft 4:54 PM EST MADIS
Douglas Park, Arlington, VA 50.8 °F - 30 °F 45% SSW  at  0.0 mph 0.00 in / hr 183 ft 5:31 PM EST Rapid Fire
APRSWXNET Douglas Park VA , Arlington, VA 51 °F - 30 °F 44% SSW  at  1 mph 0.00 in / hr 183 ft 5:03 PM EST MADIS
DCNet DC Municipal Building Washington D, Washington, DC 52 °F - 26 °F 37% South  at  10 mph 0.00 in / hr 304 ft 5:00 PM EST MADIS
Trott Ave, Vienna, VA 49.1 °F 49 °F 39 °F 68% WSW  at  0.0 mph - / hr 415 ft 5:25 PM EST Normal  
DCNet Hoover Building Washington DC, Washington, DC 53 °F - 29 °F 39% SSW  at  8 mph 0.00 in / hr 231 ft 5:00 PM EST MADIS
Kensington, Kensington, MD 47.8 °F 48 °F 36 °F 55% NW  at  0.0 mph 0.00 in / hr 381 ft 5:30 PM EST Normal  
Lake Fairfax, Vienna, VA 47.8 °F 48 °F 35 °F 61% South  at  0.0 mph 0.00 in / hr 275 ft 5:31 PM EST Rapid Fire
Hawk Ridge Subdivision, Reston, VA 47.7 °F 48 °F 36 °F 65% South  at  0.0 mph 0.00 in / hr 300 ft 5:30 PM EST Normal
Colvin Run at Hunter Mill Rd (One Lane B, Vienna, VA 49.2 °F 49 °F 35 °F 57% ESE  at  0.0 mph 0.00 in / hr 295 ft 5:30 PM EST Normal  
Villa D'este, Fairfax, VA 51.2 °F - 31 °F 46% SSE  at  0.0 mph 0.00 in / hr 355 ft 5:22 PM EST Normal  
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Public Information Statement
Mobile & Email Alerts Statement as of 5:23 PM EST on February 14, 2012

... Public information statement...

... NWS Sterling radar klwx dual-polarization upgrade ahead of
schedule...

The Sterling Virginia WSR-88D radar /klwx/ will be down for an
upgrade to dual-polarization technology /dual-pol/ starting this
Friday - February 17th... through Friday - February 24th. The
previous schedule was for the installation to occur the last two
weeks of March 2012.

While the radar is down for these upgrades... neighboring WSR-88D
radars that will be utilized are...

Kdox - Dover de
kakq - Wakefield VA
kfcx - Roanoke VA
krlx - Charleston WV
kpbz - Pittsburgh PA
kctp - State College PA
kdix - Mt Holly NJ

Two of these neighboring radars have already been upgraded to dual-
polarization technology:

Kpbz - Pittsburgh PA
kdix - Mt Holly NJ

To supplement the data suite... we also will use the following FAA
terminal Doppler weather radars /tdwrs/ during the installation
period...

Tbwi - Baltimore/Washington
tadw - Andrews AFB
tdca - Reagan National
tiad - Dulles

Dual-pol technology offers a new set of tools to better
differentiate between rain... snow... hail... mixed precipitation and
non-precipitation echoes. This upgrade provides forecasters with
better rainfall accumulation estimates and enhanced information to
more effectively forecast severe storms and winter weather.

Dual-pol utilizes a polarmetric beam that detects differences
between the vertical and horizontal orientation of atmospheric
targets. Conventional radar only detects the horizontal orientation.

To learn more about the dual polarization upgrade... and for access
to dual-pol training for non-NWS meteorologists... please visit...

Www.Wdtb.NOAA.Gov/courses/dualpol/outreach - /all lower case/

For more information or question... please contact...

Greg schoor /radar operations program Leader/
Gregory.M.Schoor@noaa.Gov


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