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

Tracking Atmospheric River for the West Coast; Space Weather Storming Continues

An atmospheric river will bring threats of gusty to high winds and heavy rainfall to California mainly Thursday into Saturday which may bring areas of flooding and wind damage. Heavy snow will be possible over the Sierra Nevada mountains Thursday into Friday associated with the atmospheric river. Minor to severe geomagnetic storming (space weather) is expected to continue into early Thursday. Read More >

Hazardous Weather Conditions

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

45°F

7°C

Humidity 49%
Wind Speed W 15 G 28 mph
Barometer 29.98 in (1016.6 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 13 Nov 3:56 am EST
Extended Forecast for

5 Miles SSE Unionville MD

  • Today

    Today: Sunny, with a high near 54. West wind 8 to 15 mph, with gusts as high as 28 mph.

    High: 54 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 32. Northwest wind around 6 mph.

    Low: 32 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 52. Northwest wind 5 to 10 mph, with gusts as high as 18 mph.

    High: 52 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 32. Light north wind.

    Low: 32 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of rain after 1pm. Partly sunny, with a high near 55. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 20%.

    High: 55 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Saturday Night

    Saturday Night: A chance of rain. Mostly cloudy, with a low around 50. Chance of precipitation is 50%.

    Low: 50 °F

    Chance Rain

  • Sunday

    Sunday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 49.

    High: 49 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 54. West wind 8 to 15 mph, with gusts as high as 28 mph.
Tonight
Mostly clear, with a low around 32. Northwest wind around 6 mph.
Friday
Sunny, with a high near 52. Northwest wind 5 to 10 mph, with gusts as high as 18 mph.
Friday Night
Partly cloudy, with a low around 32. Light north wind.
Saturday
A slight chance of rain after 1pm. Partly sunny, with a high near 55. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 20%.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 50. Chance of precipitation is 50%.
Sunday
Mostly sunny, with a high near 60.
Sunday Night
Mostly clear, with a low around 36.
Monday
Sunny, with a high near 49.
Monday Night
Partly cloudy, with a low around 32.
Tuesday
A chance of rain. Partly sunny, with a high near 49. Chance of precipitation is 30%.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
Partly sunny, with a high near 52.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Unionville MD
 39.45°N 77.07°W (Elev. 801 ft)
Last Update:
3:29 am EST Nov 13, 2025
Forecast Valid:
4am EST Nov 13, 2025-6pm EST Nov 19, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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