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 >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Overcast

42°F

6°C

Humidity 79%
Wind Speed Calm
Barometer 29.91 in (1014.4 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 15 Nov 4:56 am EST
Extended Forecast for

Potomac MD

  • Today

    Today: Scattered sprinkles after 4pm. Mostly cloudy, with a high near 63. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 63 °F

    Scattered
    Sprinkles

  • Tonight

    Tonight: Scattered showers or sprinkles before 2am, then scattered sprinkles between 2am and 4am. Mostly cloudy, with a low around 53. Southwest wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.

    Low: 53 °F

    Scattered
    Showers

  • Sunday

    Sunday: Sunny, with a temperature rising to near 56 by 11am, then falling to around 48 during the remainder of the day. Breezy, with a northwest wind 14 to 22 mph, with gusts as high as 43 mph.

    High: 56 °F⇓

    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 36. Breezy, with a northwest wind 10 to 20 mph, with gusts as high as 30 mph.

    Low: 36 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Monday

    Monday: Sunny, with a high near 49. Northwest wind 10 to 15 mph, with gusts as high as 29 mph.

    High: 49 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 32.

    Low: 32 °F

    Mostly Clear

  • Tuesday

    Tuesday: A chance of rain after 1pm. Partly sunny, with a high near 48. Chance of precipitation is 30%.

    High: 48 °F

    Partly Sunny
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: A chance of rain before 1am. Mostly cloudy, with a low around 38. Chance of precipitation is 40%.

    Low: 38 °F

    Chance Rain

  • Wednesday

    Wednesday: Partly sunny, with a high near 52.

    High: 52 °F

    Partly Sunny

Detailed Forecast

Today
Scattered sprinkles after 4pm. Mostly cloudy, with a high near 63. Calm wind becoming south 5 to 7 mph in the afternoon.
Tonight
Scattered showers or sprinkles before 2am, then scattered sprinkles between 2am and 4am. Mostly cloudy, with a low around 53. Southwest wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.
Sunday
Sunny, with a temperature rising to near 56 by 11am, then falling to around 48 during the remainder of the day. Breezy, with a northwest wind 14 to 22 mph, with gusts as high as 43 mph.
Sunday Night
Mostly clear, with a low around 36. Breezy, with a northwest wind 10 to 20 mph, with gusts as high as 30 mph.
Monday
Sunny, with a high near 49. Northwest wind 10 to 15 mph, with gusts as high as 29 mph.
Monday Night
Mostly clear, with a low around 32.
Tuesday
A chance of rain after 1pm. Partly sunny, with a high near 48. Chance of precipitation is 30%.
Tuesday Night
A chance of rain before 1am. Mostly cloudy, with a low around 38. Chance of precipitation is 40%.
Wednesday
Partly sunny, with a high near 52.
Wednesday Night
Mostly cloudy, with a low around 38.
Thursday
Partly sunny, with a high near 55.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 44. Chance of precipitation is 40%.
Friday
A chance of rain. Mostly cloudy, with a high near 62. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Potomac MD
 39.02°N 77.2°W (Elev. 381 ft)
Last Update:
5:42 am EST Nov 15, 2025
Forecast Valid:
6am EST Nov 15, 2025-6pm EST Nov 21, 2025
 
Forecast Discussion
 
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Additional Resources

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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