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

Lily SD

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

    NOW until 10:00am Thu

    Dense Fog Advisory

  • Christmas Day

    High: 38 °F

    Areas
    Freezing Fog
    and Areas Fog
    then Mostly
    Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 25. South wind 7 to 14 mph becoming north northwest after midnight. Winds could gust as high as 25 mph.

    Low: 25 °F

    Mostly Cloudy

  • Friday

    Friday: Patchy fog between 8am and 11am. Otherwise, partly sunny, with a high near 36. North northwest wind 5 to 7 mph becoming light and variable.

    High: 36 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 31. South southeast wind 7 to 10 mph.

    Low: 31 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 42. South wind around 10 mph becoming northwest in the afternoon.

    High: 42 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A slight chance of snow after midnight. Mostly cloudy, with a low around 9. Blustery, with a north northwest wind 10 to 15 mph increasing to 17 to 22 mph after midnight. Winds could gust as high as 34 mph. Chance of precipitation is 20%.

    Low: 9 °F

    Mostly Cloudy
    then Slight
    Chance Snow
    and Blustery

  • Sunday

    Sunday: A slight chance of snow before noon. Mostly cloudy, with a high near 12. Blustery, with a northwest wind 22 to 26 mph, with gusts as high as 40 mph. Chance of precipitation is 20%.

    High: 12 °F

    Blustery.
    Slight Chance
    Snow then
    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 0. Blustery, with a northwest wind 15 to 22 mph, with gusts as high as 36 mph.

    Low: 0 °F

    Mostly Cloudy
    and Blustery
    then Partly
    Cloudy

Detailed Forecast

Christmas Day
Patchy fog between 10am and noon. Areas of freezing fog between 9am and 10am. Otherwise, cloudy, with a high near 38. South southeast wind 14 to 18 mph, with gusts as high as 31 mph.
Tonight
Mostly cloudy, with a low around 25. South wind 7 to 14 mph becoming north northwest after midnight. Winds could gust as high as 25 mph.
Friday
Patchy fog between 8am and 11am. Otherwise, partly sunny, with a high near 36. North northwest wind 5 to 7 mph becoming light and variable.
Friday Night
Mostly cloudy, with a low around 31. South southeast wind 7 to 10 mph.
Saturday
Mostly sunny, with a high near 42. South wind around 10 mph becoming northwest in the afternoon.
Saturday Night
A slight chance of snow after midnight. Mostly cloudy, with a low around 9. Blustery, with a north northwest wind 10 to 15 mph increasing to 17 to 22 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 12. Blustery, with a northwest wind 22 to 26 mph, with gusts as high as 40 mph. Chance of precipitation is 20%.
Sunday Night
Mostly cloudy, with a low around 0. Blustery, with a northwest wind 15 to 22 mph, with gusts as high as 36 mph.
Monday
Sunny, with a high near 14. Northwest wind 10 to 14 mph, with gusts as high as 22 mph.
Monday Night
Mostly cloudy, with a low around 7.
Tuesday
Partly sunny, with a high near 32.
Tuesday Night
A slight chance of snow. Mostly cloudy, with a low around 12. Chance of precipitation is 20%.
Wednesday
Partly sunny, with a high near 22.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lily SD
 45.18°N 97.7°W (Elev. 1824 ft)
Last Update:
7:37 am CST Dec 25, 2025
Forecast Valid:
8am CST Dec 25, 2025-6pm CST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation