National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Excessive Rainfall and Significant Flooding in the Upper Midwest This Weekend

Heavy to excessive rainfall is expected over the weekend across eastern Iowa, northern Missouri, northwest Illinois and southern Wisconsin. Numerous flash floods, some with significant impacts, are expected in these areas. Heaviest rainfall will occur overnight Saturday and Sunday, so be sure to have multiple ways to receive warnings. Read More >

Current conditions at

Manassas, Manassas Regional Airport/Harry P. Davis Field (KHEF)

Lat: 38.72°NLon: 77.52°WElev: 194ft.

Fair

82°F

28°C

Humidity 41%
Wind Speed SE 7 mph
Barometer 30.20 in (1023.2 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 9 Aug 5:56 pm EDT
Extended Forecast for

4 Miles SSW Clifton VA

  • Tonight

    Tonight: Clear, with a low around 59. Southeast wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Clear

  • Sunday

    Sunday: Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 86. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 86 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 61. Southeast wind around 5 mph becoming calm in the evening.

    Low: 61 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 88. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 88 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 67. Southeast wind around 6 mph becoming calm in the evening.

    Low: 67 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94. Chance of precipitation is 30%.

    High: 94 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 73. Chance of precipitation is 30%.

    Low: 73 °F

    Chance
    T-storms then
    Mostly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 59. Southeast wind around 5 mph becoming calm in the evening.
Sunday
Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 86. Calm wind becoming southeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 61. Southeast wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 88. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 67. Southeast wind around 6 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 92.
Tuesday Night
Partly cloudy, with a low around 72.
Wednesday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 73. Chance of precipitation is 30%.
Thursday
A chance of showers after 2pm. Mostly sunny, with a high near 93. Chance of precipitation is 40%.
Thursday Night
A chance of showers. Partly cloudy, with a low around 72. Chance of precipitation is 30%.
Friday
A chance of showers. Mostly sunny, with a high near 91. Chance of precipitation is 40%.
Friday Night
A chance of showers. Partly cloudy, with a low around 71. Chance of precipitation is 30%.
Saturday
A chance of showers. Mostly sunny, with a high near 90. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Clifton VA
 38.73°N 77.4°W (Elev. 151 ft)
Last Update:
4:30 pm EDT Aug 9, 2025
Forecast Valid:
6pm EDT Aug 9, 2025-6pm EDT Aug 16, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation