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

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Hazardous Weather Conditions

Current conditions at

BRITTON (KBTN)

Lat: 45.82°NLon: 97.74°WElev: 1318ft.

Fog

34°F

1°C

Humidity 100%
Wind Speed Calm
Barometer 29.66 in
Dewpoint 34°F (1°C)
Visibility 0.15 mi
Last update 25 Dec 9:35 pm CST
Extended Forecast for

Hecla SD

Dense Fog Advisory December 25, 09:55pm until December 26, 10:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory December 25, 09:55pm until December 26, 10:00am

    NOW until 10:00am Fri

    Dense Fog Advisory

  • Tonight

    Low: 20 °F

    Rain/Freezing
    Rain Likely
    and Areas
    Dense Fog

  • Friday

    Friday: Patchy dense fog between 10am and 3pm. Otherwise, partly sunny, with a high near 32. Light and variable wind becoming south around 6 mph in the afternoon.

    High: 32 °F

    Patchy Dense
    Fog

  • Friday Night

    Friday Night: Patchy fog before 2am. Otherwise, mostly cloudy, with a low around 25. South southeast wind around 6 mph.

    Low: 25 °F

    Patchy Fog

  • Saturday

    Saturday: Partly sunny, with a high near 36. South southwest wind 6 to 10 mph becoming north in the afternoon.

    High: 36 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A slight chance of snow after midnight. Cloudy, with a low around 7. Blustery, with a north northwest wind 10 to 15 mph increasing to 17 to 22 mph after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 20%.

    Low: 7 °F

    Cloudy then
    Slight Chance
    Snow and
    Blustery

  • Sunday

    Sunday: Mostly cloudy, with a high near 13. Blustery, with a northwest wind 22 to 26 mph, with gusts as high as 39 mph.

    High: 13 °F

    Mostly Cloudy
    and Blustery

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around -2. Blustery, with a north northwest wind 13 to 21 mph, with gusts as high as 33 mph.

    Low: -2 °F

    Mostly Cloudy
    and Blustery
    then Partly
    Cloudy

  • Monday

    Monday: Sunny, with a high near 16. North northwest wind 8 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 21 mph.

    High: 16 °F

    Sunny

Detailed Forecast

Tonight
Rain likely before 11pm, then a chance of freezing rain between 11pm and midnight. Areas of dense fog. Otherwise, mostly cloudy, with a low around 20. Light and variable wind becoming north northwest 5 to 7 mph after midnight. Chance of precipitation is 60%. Little or no ice accumulation expected.
Friday
Patchy dense fog between 10am and 3pm. Otherwise, partly sunny, with a high near 32. Light and variable wind becoming south around 6 mph in the afternoon.
Friday Night
Patchy fog before 2am. Otherwise, mostly cloudy, with a low around 25. South southeast wind around 6 mph.
Saturday
Partly sunny, with a high near 36. South southwest wind 6 to 10 mph becoming north in the afternoon.
Saturday Night
A slight chance of snow after midnight. Cloudy, with a low around 7. Blustery, with a north northwest wind 10 to 15 mph increasing to 17 to 22 mph after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 20%.
Sunday
Mostly cloudy, with a high near 13. Blustery, with a northwest wind 22 to 26 mph, with gusts as high as 39 mph.
Sunday Night
Mostly cloudy, with a low around -2. Blustery, with a north northwest wind 13 to 21 mph, with gusts as high as 33 mph.
Monday
Sunny, with a high near 16. North northwest wind 8 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 21 mph.
Monday Night
Mostly cloudy, with a low around 7. South southwest wind 7 to 10 mph.
Tuesday
Mostly cloudy, with a high near 33.
Tuesday Night
A slight chance of snow. Mostly cloudy, with a low around 9. Chance of precipitation is 20%.
Wednesday
A slight chance of snow. Mostly cloudy, with a high near 17. Chance of precipitation is 20%.
Wednesday Night
Mostly cloudy, with a low around -1.
New Year's Day
Mostly cloudy, with a high near 13.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hecla SD
 45.87°N 98.17°W (Elev. 1289 ft)
Last Update:
9:36 pm CST Dec 25, 2025
Forecast Valid:
9pm CST Dec 25, 2025-6pm CST Jan 1, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation