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

Atmospheric River Continues Areas of Heavy Rain and Snow for California This Weekend

An atmospheric river will continue to bring gusty winds, moderate to heavy rainfall, and potential flooding to southern California and the southern Great Basin through Sunday. Periods of heavy snow will continue as well above 7,000 feet over the Sierra Nevada mountains associated with this atmospheric river. Read More >

Hazardous Weather Conditions

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

61°F

16°C

Humidity 63%
Wind Speed Vrbl 6 mph
Barometer 29.43 in (997.8 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 15 Nov 9:56 pm EST
Extended Forecast for

3 Miles S Unionville MD

Wind Advisory November 16, 09:00am until November 16, 06:00pm
Click here for hazard details and duration
Wind Advisory

  • Tonight

    Tonight: Scattered showers, mainly before 1am. Mostly cloudy, with a low around 50. Southwest wind 10 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.

    Low: 50 °F

    Scattered
    Showers

  • Sunday

    Sunday: Sunny, with a high near 54. Windy, with a northwest wind 15 to 20 mph increasing to 23 to 28 mph in the morning. Winds could gust as high as 48 mph.

    High: 54 °F

    Sunny and
    Windy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 34. West wind 11 to 17 mph, with gusts as high as 31 mph.

    Low: 34 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 46. Northwest wind 10 to 18 mph, with gusts as high as 30 mph.

    High: 46 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 30. West wind 3 to 6 mph.

    Low: 30 °F

    Mostly Clear

  • Tuesday

    Tuesday: A chance of rain after 1pm. Partly sunny, with a high near 45. Chance of precipitation is 30%.

    High: 45 °F

    Partly Sunny
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: A chance of rain. Cloudy, with a low around 37. Chance of precipitation is 40%.

    Low: 37 °F

    Chance Rain

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 49.

    High: 49 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Scattered showers, mainly before 1am. Mostly cloudy, with a low around 50. Southwest wind 10 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Sunday
Sunny, with a high near 54. Windy, with a northwest wind 15 to 20 mph increasing to 23 to 28 mph in the morning. Winds could gust as high as 48 mph.
Sunday Night
Partly cloudy, with a low around 34. West wind 11 to 17 mph, with gusts as high as 31 mph.
Monday
Sunny, with a high near 46. Northwest wind 10 to 18 mph, with gusts as high as 30 mph.
Monday Night
Mostly clear, with a low around 30. West wind 3 to 6 mph.
Tuesday
A chance of rain after 1pm. Partly sunny, with a high near 45. Chance of precipitation is 30%.
Tuesday Night
A chance of rain. Cloudy, with a low around 37. Chance of precipitation is 40%.
Wednesday
Mostly cloudy, with a high near 49.
Wednesday Night
Mostly cloudy, with a low around 36.
Thursday
Mostly cloudy, with a high near 52.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 42. Chance of precipitation is 40%.
Friday
A chance of rain. Mostly cloudy, with a high near 59. Chance of precipitation is 40%.
Friday Night
A chance of rain. Mostly cloudy, with a low around 49. Chance of precipitation is 50%.
Saturday
A chance of rain. Partly sunny, with a high near 62. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Unionville MD
 39.48°N 77.12°W (Elev. 650 ft)
Last Update:
9:53 pm EST Nov 15, 2025
Forecast Valid:
10pm EST Nov 15, 2025-6pm EST Nov 22, 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