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    l3a20
    Jul 24 2008 17:52:57

    Great Falls, Virginia

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    Local Time: 9:45 AM EDTSet My Timezone Lat/Lon: 39.0° N 77.3° W (Google Map)
    Tropical Weather: Invest 97 (North Atlantic) Tropical Storm Genevieve (East Pacific) Tropical Storm Fung-Wong (Western Pacific)
    Current Conditions     
     
    Hickory Creek, Great Falls, Virginia (PWS)
    Updated: 9:45 AM EDT on July 26, 2008
    Partly Cloudy
    73.5 °F / 23.1 °C
    Partly Cloudy
    Humidity: 77%
    Dew Point: 66 °F / 19 °C
    Wind: Calm
    Wind Gust: 0.0 mph / 0.0 km/h
    Pressure: 29.95 in / 1014.1 hPa (Steady)
    Heat Index: 74 °F / 24 °C
    Visibility: 10.0 miles / 16.1 kilometers
    UV: 3 out of 16
    Clouds:
    Few 15000 ft / 4572 m
    (Above Ground Level)
    Elevation: 350 ft / 106 m
    Rapid Fire Updates:
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    Source for Current Conditions:
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    » Weather History for This Location

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    Flight Rule: VFR (KIAD)
    Wind Speed: 0.0 mph / 0.0 km/h / 0.0 m/s
    Wind Dir: 148° (SSE)
    Ceiling: Unlimited
    Full ReportPilot Maps
     
    Nearby Airports
    City: Temp.: Conditions: Updated:
      Dulles Airport 74 °F / 23 °C Partly Cloudy 8:52 AM EDT
      Gaithersburg 79 °F / 26 °C Clear 9:35 AM EDT
      Leesburg 79 °F / 26 °C Clear 9:40 AM EDT
      Washington 77 °F / 25 °C Partly Cloudy 8:52 AM EDT
    History & Almanac Hide
      Max Temperature: Min Temperature:
    Normal (KIAD) 88 °F / 31 °C 65 °F / 18 °C
    Record (KIAD) 98 °F / 36 °C (1966) 50 °F / 10 °C (1976)
    Yesterday 86 °F / 30 °C 58 °F / 14 °C
    Yesterday's Cooling Degree Days: 7
    Detailed History and Climate (KIAD)
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    Great Falls, VA
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    Great Falls
    Today's State Extremes Hide
    State Highs:
    Melfa 80°F / 27°C
    South Hill 78°F / 26°C
    Norfolk NAS 78°F / 26°C
    Langley AFB 77°F / 25°C
    Franklin 77°F / 25°C
    State Lows:
    Marion 60°F / 16°C
    Petersburg 60°F / 16°C
    Stafford 62°F / 17°C
    Chesapeake 62°F / 17°C
    Martinsville 62°F / 17°C
    Astronomy Hide
    July 26, 2008 Rise: Set:
    Actual Time 6:05 AM EDT 8:25 PM EDT
    Civil Twilight 5:34 AM EDT 8:56 PM EDT
    Nautical Twilight 4:57 AM EDT 9:33 PM EDT
    Astronomical Twilight 4:16 AM EDT 10:14 PM EDT
    Moon 12:05 AM EDT 2:59 PM EDT
    Length Of Visible Light: 15h 21m
    Length of Day
    14h 20m
    Tomorrow will be 1m 45s shorter.

    Extended View

    Last Quarter, 41% of the Moon is Illuminated
    Today
    8 / 1
    New
    8 / 8
    First Quarter
    8 / 16
    Full
    8 / 23
    Last Quarter

    For more information about the solar system:

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    Great Falls, VA
    73.5 °F / 23.1 °C
    Partly Cloudy
    at 9:45 AM EDT

    (Click for forecast)

    5-Day Forecast for ZIP Code 22066 Customize Your Icons!
    Saturday Sunday Monday Tuesday Wednesday
    Thunderstorm
    86° F | 65° F
    30° C | 18° C
    Chance of a Thunderstorm
    88° F | 65° F
    31° C | 18° C
    Partly Cloudy
    88° F | 63° F
    31° C | 17° C
    Clear
    92° F | 68° F
    33° C | 20° C
    Chance of a Thunderstorm
    94° F | 68° F
    34° C | 20° C
    T-storms
    50% chance of precipitation
    Chance of T-storms
    40% chance of precipitation
    Partly Cloudy Clear Chance of T-storms
    30% chance of precipitation
    Today is forecast to be nearly the same temperature as yesterday.
    Forecast for Fairfax Hide
    Updated: 4:02 am EDT on July 26, 2008
    No Active Advisories (US Severe Weather)
    partlycloudy
    Today
    Mostly sunny in the morning...becoming mostly cloudy this afternoon. Isolated showers and thunderstorms this afternoon. Highs in the upper 80s. South winds 10 to 15 mph. Chance of rain 20 percent.
    nt_chancerain
    Tonight
    Mostly cloudy with a chance of showers and thunderstorms. Lows in the upper 60s. Southwest winds 5 to 10 mph. Chance of rain 50 percent.
    chancerain
    Sunday
    Partly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. West winds 5 to 10 mph. Chance of rain 40 percent.
    nt_chancerain
    Sunday Night
    Mostly cloudy with a chance of showers and thunderstorms in the evening...then partly cloudy after midnight. Lows in the lower 60s. North winds around 5 mph. Chance of rain 30 percent.
    partlycloudy
    Monday
    Mostly sunny. Highs in the upper 80s. Northwest winds around 5 mph.
    nt_sunny
    Monday Night
    Mostly clear. Lows in the mid 60s.
    sunny
    Tuesday
    Sunny. Highs in the lower 90s.
    nt_partlycloudy
    Tuesday Night
    Partly cloudy. Lows in the upper 60s.
    partlysunny
    Wednesday
    Partly sunny. Highs in the mid 90s.
    nt_chancerain
    Wednesday Night
    Mostly cloudy with a chance of showers and thunderstorms. Lows in the upper 60s. Chance of rain 30 percent.
    chancerain
    Thursday
    Partly sunny with a chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 30 percent.
    nt_partlycloudy
    Thursday Night
    Partly cloudy. Lows in the mid 60s.
    partlycloudy
    Friday
    Mostly sunny. Highs in the upper 80s.
    Alternate Computer Forecast: AVN MOS Weather Graph
    Scientific Forecaster Discussion (NWS)
    Air Quality Forecast for Northern Virginia Hide
      Air Quality: AQ Index: Pollutant:
    Yesterday Good OZONE
    Yesterday Good PM2.5
    Current Moderate PM2.5
    Current Good OZONE
    Friday Moderate OZONE
    Friday Moderate PM2.5
    Saturday Unhealthy for Sensitive Groups OZONE
    Saturday Moderate PM2.5
    Sunday Moderate PM2.5
    Sunday Moderate OZONE
    Monday Moderate PM2.5
    Monday Moderate OZONE
    Want to learn more about air pollution? Visit our health section.

    Current Air Quality Yesterday's Peak

    Sports Weather Hide
    MLB: Date: Forecast:
    Phillies vs. Nationals 7:10 PM EDT on July 29, 2008 Clear, 85 °F / 29 °C
    Phillies vs. Nationals 7:10 PM EDT on July 30, 2008 Chance of a Thunderstorm, 85 °F / 29 °C
    Football (Soccer): Date: Forecast:
    Kansas City vs. D.C. 7:30 PM EDT on August 02, 2008 Average High 89° F/ 31° C
    Colorado vs. D.C. 7:30 PM EDT on August 23, 2008 Average High 84° F/ 28° C
    NASCAR: Date: Forecast:
    Allstate 400 at The Brickyard 2:20 PM EDT on July 27, 2008 Partly Cloudy, 81 °F / 27 °C
    Sunoco Red Cross Pennsylvania 500 2:20 PM EDT on August 03, 2008 Average High 78° F/ 25° C
    PGA Golf: Date: Forecast:
    RBC Canadian Open 8:30 AM EDT on July 26, 2008 Clear, High 77° F/ 25° C
    RBC Canadian Open 8:30 AM EDT on July 27, 2008 Clear, High 77° F/ 25° C
    View Schedules: MLB | IFB | NASCAR | PGA Golf
    Blogs in This Area Hide
    City: Member: Title: Last Activity:
    Fairfax Proserpina Proserpina's Wunder Blog 1 hour ago
    Blogs for people who love weather and the outdoors! View All Blogs »


    Weather Stations Hide
    Station Location Temp. Dew Point Humidity Wind Pressure Precipitation Heat Index Elevation Updated Type  
    Hickory Creek, Great Falls, VA 73.5 °F / 23.1 °C 66 °F / 19 °C 77%
    SSE  at  0.0 mph / 0.0 km/h / 0.0 m/s
    29.95 in / 1014.1 hPa 0.00 in / 0 mm / hr 74 °F / 24 °C 350 ft 9:45 AM EDT Normal Website
    Lake Fairfax, Vienna, VA 77.8 °F / 25.4 °C 68 °F / 20 °C 72%
    SSW  at  4.0 mph / 6.4 km/h / 1.8 m/s
    29.71 in / 1006.0 hPa 0.00 in / 0 mm / hr 80 °F / 27 °C 275 ft 9:45 AM EDT Rapid Fire Website
    Great Falls, Great Falls, VA 78.1 °F / 25.6 °C 65 °F / 19 °C 65%
    SE  at  1.0 mph / 1.6 km/h / 0.4 m/s
    30.00 in / 1015.8 hPa 0.00 in / 0 mm / hr 80 °F / 27 °C 339 ft 9:45 AM EDT Rapid Fire  
    APRSWXNET Great Falls VA , Sterling, VA 76 °F / 24.4 °C 67 °F / 19 °C 73%
    NE  at  0 mph / 0.0 km/h / 0.0 m/s
    30.05 in / 1017.5 hPa 0.00 in / 0 mm / hr 77 °F / 25 °C 321 ft 9:32 AM EDT MADIS Website
    Hawk Ridge Subdivision (South), Reston, VA 78.3 °F / 25.7 °C 67 °F / 20 °C 69%
    NE  at  0.0 mph / 0.0 km/h / 0.0 m/s
    29.97 in / 1014.8 hPa 0.00 in / 0 mm / hr 80 °F / 27 °C 300 ft 9:40 AM EDT Normal Website
    Cedar Cove Cluster, Reston, VA 76.6 °F / 24.8 °C 67 °F / 20 °C 72%
    SSW  at  0.0 mph / 0.0 km/h / 0.0 m/s
    29.98 in / 1015.1 hPa 0.00 in / 0 mm / hr 78 °F / 26 °C 350 ft 9:44 AM EDT Rapid Fire  
    Beulah-Wolf Trap, Vienna, VA 76.1 °F / 24.5 °C 68 °F / 20 °C 76%
    NNW  at  0.0 mph / 0.0 km/h / 0.0 m/s
    30.00 in / 1015.8 hPa 0.00 in / 0 mm / hr 77 °F / 25 °C 430 ft 9:44 AM EDT Rapid Fire Website
    MDDOT I-495 at Am Lgn Br, Cabin John, MD 82 °F / 27.8 °C 62 °F / 17 °C 50%
    NW  at  1 mph / 1.6 km/h / 0.4 m/s
    - 0.00 in / 0 mm / hr 83 °F / 28 °C 46 ft 9:25 AM EDT MADIS Website
    Burning Tree Estates, Bethesda, MD 79.8 °F / 26.6 °C 64 °F / 18 °C 59%
    SSW  at  1.0 mph / 1.6 km/h / 0.4 m/s
    29.98 in / 1015.1 hPa 0.00 in / 0 mm / hr 81 °F / 27 °C 245 ft 9:40 AM EDT Normal  
    Potomac Highlands, Rockville, MD 77.2 °F / 25.1 °C 66 °F / 19 °C 68%
    North  at  -
    30.04 in / 1017.2 hPa 0.00 in / 0 mm / hr 79 °F / 26 °C 350 ft 9:30 AM EDT Normal  
    Quince Orchard Knolls, North Potomac, MD 75.9 °F / 24.4 °C 62 °F / 17 °C 62%
    SE  at  0.0 mph / 0.0 km/h / 0.0 m/s
    30.03 in / 1016.8 hPa 0.00 in / 0 mm / hr 78 °F / 25 °C 325 ft 9:45 AM EDT Rapid Fire Website
    McLean, McLean, VA 77.6 °F / 25.3 °C 66 °F / 19 °C 67%
    SSE  at  0.0 mph / 0.0 km/h / 0.0 m/s
    30.01 in / 1016.1 hPa 0.00 in / 0 mm / hr 79 °F / 26 °C 285 ft 9:44 AM EDT Normal  
    Franklin Farm/Still Oaks, Oak Hill, VA 78.0 °F / 25.6 °C 64 °F / 18 °C 63%
    ESE  at  0.0 mph / 0.0 km/h / 0.0 m/s
    30.05 in / 1017.5 hPa 0.00 in / 0 mm / hr 80 °F / 27 °C 406 ft 9:36 AM EDT Normal<