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

Heavy Rainfall and Flooding in the Southwest and Four Corners; Unsettled Weather in Florida

Heavy to excessive rainfall will continue today across portions of the Southwest and Four Corners Region, leading to flash, urban and small stream flooding. Significant river flooding is expected through Monday. Heavy rainfall is expected across southern and eastern Florida through Monday, with isolated flash flooding possible. Read More >

Current conditions at

Washington Manassas Airport (KHEF)

Lat: 38.72°NLon: 77.52°WElev: 194ft.

Fair

56°F

13°C

Humidity 60%
Wind Speed SE 3 mph
Barometer 30.47 in (1032.6 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 1 Nov 5:56 pm EST
Extended Forecast for

Loch Lomond VA

  • Tonight

    Tonight: Increasing clouds, with a low around 43. Light and variable wind.

    Low: 43 °F

    Increasing
    Clouds

  • Monday

    Monday: Cloudy, then gradually becoming mostly sunny, with a high near 67. Calm wind becoming south around 5 mph in the afternoon.

    High: 67 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Mostly clear, with a low around 44. Light south wind.

    Low: 44 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 73. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 73 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 50. Southeast wind around 5 mph becoming calm in the evening.

    Low: 50 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of rain after 1am. Mostly cloudy, with a low around 59. Chance of precipitation is 30%.

    Low: 59 °F

    Mostly Cloudy
    then Chance
    Rain

  • Thursday

    Thursday: Rain likely, with thunderstorms also possible after 1pm. Cloudy, with a high near 74. Chance of precipitation is 60%.

    High: 74 °F

    Rain Likely

  • Thursday Night

    Thursday Night: Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.

    Low: 59 °F

    Rain Likely

Detailed Forecast

Tonight
Increasing clouds, with a low around 43. Light and variable wind.
Monday
Cloudy, then gradually becoming mostly sunny, with a high near 67. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 44. Light south wind.
Tuesday
Sunny, with a high near 73. Calm wind becoming south 5 to 7 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 50. Southeast wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 75.
Wednesday Night
A chance of rain after 1am. Mostly cloudy, with a low around 59. Chance of precipitation is 30%.
Thursday
Rain likely, with thunderstorms also possible after 1pm. Cloudy, with a high near 74. Chance of precipitation is 60%.
Thursday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.
Friday
A chance of rain, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 72. Chance of precipitation is 50%.
Friday Night
A slight chance of rain. Mostly cloudy, with a low around 52. Chance of precipitation is 20%.
Saturday
A slight chance of rain. Mostly sunny, with a high near 66. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 45.
Sunday
Mostly sunny, with a high near 65.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Loch Lomond VA
 38.78°N 77.47°W (Elev. 210 ft)
Last Update:
3:53 pm EST Nov 1, 2026
Forecast Valid:
6pm EST Nov 1, 2026-6pm EST Nov 8, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation