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

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Clark SDSimilar City Names

Dense Fog Advisory December 26, 12:15am until December 26, 10:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory December 26, 12:15am until December 26, 10:00am

    NOW until 10:00am Fri

    Dense Fog Advisory

  • Overnight

    Low: 26 °F

    Chance Rain
    and Areas
    Dense
    Freezing Fog

  • Friday

    Friday: Areas of dense fog before 7am, then patchy dense fog after 8am. Areas of dense freezing fog between 7am and 8am. Otherwise, partly sunny, with a high near 37. North northwest wind 5 to 9 mph becoming south southeast in the morning.

    High: 37 °F

    Areas Dense
    Freezing Fog
    and Areas
    Dense Fog

  • Friday Night

    Friday Night: Patchy fog before 8pm. Otherwise, mostly cloudy, with a low around 32. South southeast wind 9 to 11 mph, with gusts as high as 20 mph.

    Low: 32 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 44. South wind around 10 mph becoming north in the afternoon.

    High: 44 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A slight chance of snow after midnight. Mostly cloudy, with a low around 10. Blustery, with a north northwest wind 10 to 15 mph increasing to 18 to 23 mph after midnight. Winds could gust as high as 34 mph. Chance of precipitation is 20%.

    Low: 10 °F

    Mostly Cloudy
    then Slight
    Chance Snow
    and Blustery

  • Sunday

    Sunday: A slight chance of snow before noon. Mostly cloudy, with a high near 15. Blustery, with a northwest wind 23 to 29 mph, with gusts as high as 41 mph. Chance of precipitation is 20%.

    High: 15 °F

    Blustery.
    Slight Chance
    Snow then
    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 1. Blustery, with a north northwest wind 18 to 25 mph, with gusts as high as 37 mph.

    Low: 1 °F

    Mostly Cloudy
    and Blustery

  • Monday

    Monday: Sunny, with a high near 14. Northwest wind 9 to 17 mph becoming west southwest in the afternoon. Winds could gust as high as 26 mph.

    High: 14 °F

    Sunny

Detailed Forecast

Overnight
A chance of rain before 1am. Areas of dense fog before 3am, then patchy dense fog after 4am. Areas of dense freezing fog between 3am and 4am. Otherwise, mostly cloudy, with a low around 26. Light northwest wind becoming north northwest 5 to 9 mph. Chance of precipitation is 30%.
Friday
Areas of dense fog before 7am, then patchy dense fog after 8am. Areas of dense freezing fog between 7am and 8am. Otherwise, partly sunny, with a high near 37. North northwest wind 5 to 9 mph becoming south southeast in the morning.
Friday Night
Patchy fog before 8pm. Otherwise, mostly cloudy, with a low around 32. South southeast wind 9 to 11 mph, with gusts as high as 20 mph.
Saturday
Partly sunny, with a high near 44. South wind around 10 mph becoming north in the afternoon.
Saturday Night
A slight chance of snow after midnight. Mostly cloudy, with a low around 10. Blustery, with a north northwest wind 10 to 15 mph increasing to 18 to 23 mph after midnight. Winds could gust as high as 34 mph. Chance of precipitation is 20%.
Sunday
A slight chance of snow before noon. Mostly cloudy, with a high near 15. Blustery, with a northwest wind 23 to 29 mph, with gusts as high as 41 mph. Chance of precipitation is 20%.
Sunday Night
Mostly cloudy, with a low around 1. Blustery, with a north northwest wind 18 to 25 mph, with gusts as high as 37 mph.
Monday
Sunny, with a high near 14. Northwest wind 9 to 17 mph becoming west southwest in the afternoon. Winds could gust as high as 26 mph.
Monday Night
Mostly cloudy, with a low around 10. Southwest wind 8 to 10 mph.
Tuesday
Partly sunny, with a high near 33.
Tuesday Night
A slight chance of snow. Partly cloudy, with a low around 14. Chance of precipitation is 20%.
Wednesday
A slight chance of snow. Mostly cloudy, with a high near 22. Chance of precipitation is 20%.
Wednesday Night
Mostly cloudy, with a low around 4.
New Year's Day
Partly sunny, with a high near 17.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Clark SDSimilar City Names
 44.88°N 97.75°W (Elev. 1808 ft)
Last Update:
11:36 pm CST Dec 25, 2025
Forecast Valid:
12am CST Dec 26, 2025-6pm CST Jan 1, 2026
 
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