Heavy Great Lakes Snow through Friday; Watching Potential for Major Winter Storm Late Week into this Weekend

Heavy lake effect snow will continue in the Great Lakes into Wednesday before another storm brings a widespread general snow followed by another round of heavy lake effect snow. A wide-ranging winter storm will produce great swaths of heavy snow, sleet, and treacherous freezing rain from the southern Rockies/Plains and Mid-South starting Friday and shifting toward the East Coast through Sunday. Read More >

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Light Snow

13°F

-11°C

Humidity 77%
Wind Speed S 8 mph
Barometer 30.00 in (1020.2 mb)
Dewpoint 7°F (-14°C)
Visibility 3.00 mi
Wind Chill2°F (-17°C)
Last update 20 Jan 12:53 pm CST
Extended Forecast for

3 Miles ESE Watertown Municipal Airport SD

Extreme Cold Watch January 22, 06:00pm until January 23, 03:00pm
Winter Weather Advisory January 21, 08:00am until January 21, 06:00pm
Click here for hazard details and duration
Extreme Cold Watch
Winter Weather Advisory
  • This Afternoon

    This Afternoon: Snow likely, mainly after 3pm.  Mostly cloudy, with a high near 16. South wind 6 to 10 mph.  Chance of precipitation is 70%. Total daytime snow accumulation of less than one inch possible.

    High: 16 °F

    Snow Likely

  • Tonight

    Tonight: A slight chance of snow before 7pm.  Mostly cloudy, with a steady temperature around 9. West wind 5 to 10 mph, with gusts as high as 21 mph.  Chance of precipitation is 20%.

    Low: 9 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of snow between 2pm and 3pm.  Patchy blowing snow after 11am. Mostly cloudy, with a high near 23. Blustery, with a northwest wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 37 mph.  Chance of precipitation is 50%.

    High: 23 °F

    Chance Snow
    and Patchy
    Blowing Snow

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around -4. West northwest wind 10 to 18 mph, with gusts as high as 33 mph.

    Low: -4 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny and cold, with a high near 6. Northwest wind 10 to 16 mph, with gusts as high as 28 mph.

    High: 6 °F

    Cold

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -24. North northwest wind 7 to 14 mph, with gusts as high as 23 mph.

    Low: -24 °F

    Partly Cloudy

  • Friday

    Friday: Sunny and cold, with a high near -11. Northwest wind 5 to 7 mph.

    High: -11 °F

    Cold

  • Friday Night

    Friday Night: Partly cloudy, with a low around -21. West northwest wind around 5 mph becoming light and variable.

    Low: -21 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny and cold, with a high near -1. South wind 6 to 10 mph.

    High: -1 °F

    Cold

Detailed Forecast

This Afternoon
Snow likely, mainly after 3pm. Mostly cloudy, with a high near 16. South wind 6 to 10 mph. Chance of precipitation is 70%. Total daytime snow accumulation of less than one inch possible.
Tonight
A slight chance of snow before 7pm. Mostly cloudy, with a steady temperature around 9. West wind 5 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Wednesday
A chance of snow between 2pm and 3pm. Patchy blowing snow after 11am. Mostly cloudy, with a high near 23. Blustery, with a northwest wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 37 mph. Chance of precipitation is 50%.
Wednesday Night
Partly cloudy, with a low around -4. West northwest wind 10 to 18 mph, with gusts as high as 33 mph.
Thursday
Mostly sunny and cold, with a high near 6. Northwest wind 10 to 16 mph, with gusts as high as 28 mph.
Thursday Night
Partly cloudy, with a low around -24. North northwest wind 7 to 14 mph, with gusts as high as 23 mph.
Friday
Sunny and cold, with a high near -11. Northwest wind 5 to 7 mph.
Friday Night
Partly cloudy, with a low around -21. West northwest wind around 5 mph becoming light and variable.
Saturday
Mostly sunny and cold, with a high near -1. South wind 6 to 10 mph.
Saturday Night
Partly cloudy, with a low around -16.
Sunday
Mostly sunny and cold, with a high near 6.
Sunday Night
Mostly clear, with a low around -8.
Monday
Mostly sunny, with a high near 16.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE Watertown Municipal Airport SD
 44.91°N 97.11°W (Elev. 1752 ft)
12:31 pm CST Jan 20, 2026
1pm CST Jan 20, 2026-6pm CST Jan 26, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database