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

ONIDAMUNC (K98D)

Lat: 44.7°NLon: 100.1°WElev: 1874ft.

Freezing Fog and Breezy

27°F

-3°C

Humidity 100%
Wind Speed E 21 mph
Barometer 30.03 in
Dewpoint 27°F (-3°C)
Visibility 0.15 mi
Wind Chill13°F (-11°C)
Last update 24 Dec 9:55 pm CST
Extended Forecast for

Gettysburg SD

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

    NOW until 10:00am Thu

    Dense Fog Advisory

  • Tonight

    Low: 22 °F

    Areas Dense
    Freezing Fog

  • Christmas Day

    Christmas Day: Areas of dense fog between 8am and 11am. Areas of dense freezing fog before 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 47. East southeast wind 10 to 18 mph becoming west in the afternoon. Winds could gust as high as 26 mph.

    High: 47 °F

    Areas Dense
    Freezing Fog
    and Areas
    Dense Fog

  • Thursday Night

    Thursday Night: Patchy fog between 10pm and 5am. Otherwise, partly cloudy, with a low around 25. Northwest wind 8 to 10 mph.

    Low: 25 °F

    Patchy Fog

  • Friday

    Friday: Mostly sunny, with a high near 44. North wind 5 to 10 mph becoming south in the afternoon.

    High: 44 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 30. South wind around 10 mph becoming west southwest after midnight.

    Low: 30 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 46. West southwest wind 10 to 17 mph becoming north northwest in the afternoon. Winds could gust as high as 25 mph.

    High: 46 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A slight chance of snow after midnight. Mostly cloudy, with a low around 6. Blustery, with a north northwest wind 18 to 26 mph, with gusts as high as 37 mph. Chance of precipitation is 20%.

    Low: 6 °F

    Blustery.
    Mostly Cloudy
    then Slight
    Chance Snow

  • Sunday

    Sunday: Mostly sunny, with a high near 13. Blustery, with a northwest wind 22 to 28 mph, with gusts as high as 40 mph.

    High: 13 °F

    Mostly Sunny
    and Blustery

Detailed Forecast

Tonight
Areas of dense freezing fog. Mostly cloudy, with a low around 22. East wind 15 to 18 mph.
Christmas Day
Areas of dense fog between 8am and 11am. Areas of dense freezing fog before 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 47. East southeast wind 10 to 18 mph becoming west in the afternoon. Winds could gust as high as 26 mph.
Thursday Night
Patchy fog between 10pm and 5am. Otherwise, partly cloudy, with a low around 25. Northwest wind 8 to 10 mph.
Friday
Mostly sunny, with a high near 44. North wind 5 to 10 mph becoming south in the afternoon.
Friday Night
Partly cloudy, with a low around 30. South wind around 10 mph becoming west southwest after midnight.
Saturday
Mostly sunny, with a high near 46. West southwest wind 10 to 17 mph becoming north northwest in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
A slight chance of snow after midnight. Mostly cloudy, with a low around 6. Blustery, with a north northwest wind 18 to 26 mph, with gusts as high as 37 mph. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 13. Blustery, with a northwest wind 22 to 28 mph, with gusts as high as 40 mph.
Sunday Night
Mostly clear, with a low around 0. Blustery, with a northwest wind 11 to 20 mph, with gusts as high as 29 mph.
Monday
Sunny, with a high near 21.
Monday Night
Mostly cloudy, with a low around 12.
Tuesday
Mostly sunny, with a high near 38.
Tuesday Night
A slight chance of snow. Mostly cloudy, with a low around 12. Chance of precipitation is 20%.
Wednesday
Mostly cloudy, with a high near 27.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Gettysburg SD
 44.98°N 99.96°W (Elev. 2057 ft)
Last Update:
9:36 pm CST Dec 24, 2025
Forecast Valid:
10pm CST Dec 24, 2025-6pm CST Dec 31, 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