Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Hazardous Weather Conditions

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

-6°F

-21°C

Humidity 83%
Wind Speed S 3 mph
Barometer 30.11 in (1024.7 mb)
Dewpoint -10°F (-23°C)
Visibility 10.00 mi
Last update 20 Jan 6:53 am CST
Extended Forecast for

6 Miles WSW Watertown SD

  • Today

    Today: Snow, mainly after noon.  High near 17. Light south southeast wind becoming south 5 to 10 mph in the morning.  Chance of precipitation is 80%. Total daytime snow accumulation of less than one inch possible.

    High: 17 °F

    Partly Sunny
    then Snow

  • Tonight

    Tonight: A chance of snow, mainly before 9pm.  Mostly cloudy, with a low around 8. South southwest wind 7 to 10 mph becoming west northwest in the evening. Winds could gust as high as 20 mph.  Chance of precipitation is 50%.

    Low: 8 °F

    Chance Snow
    then Mostly
    Cloudy

  • Wednesday

    Wednesday: Snow likely, mainly before noon.  Patchy blowing snow after 10am. Partly sunny, with a high near 24. Windy, with a northwest wind 13 to 18 mph increasing to 25 to 30 mph in the afternoon. Winds could gust as high as 41 mph.  Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    High: 24 °F

    Snow Likely
    and Patchy
    Blowing Snow

  • Wednesday Night

    Wednesday Night: Patchy blowing snow before 7pm. Partly cloudy, with a low around 1. Blustery, with a west northwest wind 10 to 20 mph, with gusts as high as 32 mph.

    Low: 1 °F

    Patchy
    Blowing Snow
    and Blustery
    then Partly
    Cloudy

  • Thursday

    Thursday: Partly sunny and cold, with a high near 6. Northwest wind 10 to 17 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 13 mph, with gusts as high as 22 mph.

    Low: -24 °F

    Partly Cloudy

  • Friday

    Friday: Sunny and cold, with a high near -12. Northwest wind 6 to 8 mph.

    High: -12 °F

    Cold

  • Friday Night

    Friday Night: Partly cloudy, with a low around -21. North northwest wind around 6 mph becoming south southeast after midnight.

    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

Today
Snow, mainly after noon. High near 17. Light south southeast wind becoming south 5 to 10 mph in the morning. Chance of precipitation is 80%. Total daytime snow accumulation of less than one inch possible.
Tonight
A chance of snow, mainly before 9pm. Mostly cloudy, with a low around 8. South southwest wind 7 to 10 mph becoming west northwest in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 50%.
Wednesday
Snow likely, mainly before noon. Patchy blowing snow after 10am. Partly sunny, with a high near 24. Windy, with a northwest wind 13 to 18 mph increasing to 25 to 30 mph in the afternoon. Winds could gust as high as 41 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Wednesday Night
Patchy blowing snow before 7pm. Partly cloudy, with a low around 1. Blustery, with a west northwest wind 10 to 20 mph, with gusts as high as 32 mph.
Thursday
Partly sunny and cold, with a high near 6. Northwest wind 10 to 17 mph, with gusts as high as 28 mph.
Thursday Night
Partly cloudy, with a low around -24. North northwest wind 7 to 13 mph, with gusts as high as 22 mph.
Friday
Sunny and cold, with a high near -12. Northwest wind 6 to 8 mph.
Friday Night
Partly cloudy, with a low around -21. North northwest wind around 6 mph becoming south southeast after midnight.
Saturday
Mostly sunny and cold, with a high near -1. South wind 6 to 10 mph.
Saturday Night
Partly cloudy, with a low around -14.
Sunday
Mostly sunny and cold, with a high near 7.
Sunday Night
Partly cloudy, with a low around -6.
Monday
Mostly sunny, with a high near 18.
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles WSW Watertown SD
 44.88°N 97.26°W (Elev. 1749 ft)
7:37 am CST Jan 20, 2026
7am 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