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

Lake Effect Snow in the Lower Great Lakes; Unsettled Pattern in the Pacific Northwest

Lake-effect snow will continue downwind of Lakes Erie and Ontario through Friday. Lake Effect Snow Warnings have been issued. In the Western U.S., rain and higher elevation snow will continue over the Great Basin through Friday. A front will move over the Pacific Northwest this afternoon and produce light rain and higher elevation snow over the Cascades through Saturday. Read More >

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

49°F

9°C

Humidity 43%
Wind Speed S 5 mph
Barometer 30.02 in (1017.9 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 12 Feb 3:53 pm CST
Extended Forecast for

4 Miles ESE Castlewood SD

  • This Afternoon

    This Afternoon: Sunny, with a high near 49. West southwest wind around 6 mph.

    High: 49 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 26. Northwest wind around 5 mph becoming calm in the evening.

    Low: 26 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 52. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 52 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 29. South wind around 7 mph.

    Low: 29 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 54. South southwest wind 6 to 10 mph becoming west northwest in the afternoon.

    High: 54 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 29. West northwest wind around 6 mph.

    Low: 29 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 56. South southwest wind 5 to 11 mph, with gusts as high as 20 mph.

    High: 56 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 34. South wind 8 to 10 mph becoming north after midnight.

    Low: 34 °F

    Mostly Cloudy

  • Washington's Birthday

    Washington's Birthday: Sunny, with a high near 54. North wind 8 to 10 mph becoming east in the afternoon.

    High: 54 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 49. West southwest wind around 6 mph.
Tonight
Mostly clear, with a low around 26. Northwest wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 52. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Friday Night
Mostly clear, with a low around 29. South wind around 7 mph.
Saturday
Sunny, with a high near 54. South southwest wind 6 to 10 mph becoming west northwest in the afternoon.
Saturday Night
Mostly clear, with a low around 29. West northwest wind around 6 mph.
Sunday
Partly sunny, with a high near 56. South southwest wind 5 to 11 mph, with gusts as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 34. South wind 8 to 10 mph becoming north after midnight.
Washington's Birthday
Sunny, with a high near 54. North wind 8 to 10 mph becoming east in the afternoon.
Monday Night
Partly cloudy, with a low around 34.
Tuesday
A slight chance of rain. Mostly cloudy, with a high near 52. Chance of precipitation is 20%.
Tuesday Night
Rain likely. Mostly cloudy, with a low around 31. Chance of precipitation is 60%.
Wednesday
A chance of rain and snow. Mostly cloudy, with a high near 40. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ESE Castlewood SD
 44.72°N 96.96°W (Elev. 1749 ft)
Last Update:
3:36 pm CST Feb 12, 2026
Forecast Valid:
4pm CST Feb 12, 2026-6pm CST Feb 18, 2026
 
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