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.

Overcast and Breezy

-5°F

-21°C

Humidity 72%
Wind Speed NW 24 G 32 mph
Barometer 30.26 in (1029.0 mb)
Dewpoint -12°F (-24°C)
Visibility 10.00 mi
Wind Chill-30°F (-34°C)
Last update 18 Jan 11:53 pm CST
Extended Forecast for

3 Miles ESE Watertown Municipal Airport SD

  • Overnight

    Overnight: Partly cloudy, with a low around -8. Wind chill values as low as -30. Blustery, with a northwest wind 14 to 22 mph, with gusts as high as 37 mph.

    Low: -8 °F

    Partly Cloudy
    and Blustery

  • M.L.King Day

    M.L.King Day: Partly sunny and cold, with a high near 7. Wind chill values as low as -27. West wind 11 to 15 mph, with gusts as high as 25 mph.

    High: 7 °F

    Cold

  • Monday Night

    Monday Night: Mostly clear, with a low around -8. Northwest wind 5 to 9 mph becoming west southwest after midnight.

    Low: -8 °F

    Mostly Clear

  • Tuesday

    Tuesday: A chance of snow after noon.  Partly sunny, with a high near 15. South southwest wind 5 to 9 mph.  Chance of precipitation is 30%.

    High: 15 °F

    Partly Sunny
    then Chance
    Snow

  • Tuesday Night

    Tuesday Night: A chance of snow before midnight.  Mostly cloudy, with a low around 8. South southwest wind 6 to 11 mph becoming west northwest in the evening. Winds could gust as high as 21 mph.  Chance of precipitation is 30%.

    Low: 8 °F

    Chance Snow
    then Mostly
    Cloudy

  • Wednesday

    Wednesday: A chance of snow.  Partly sunny, with a high near 20. Blustery, with a northwest wind 11 to 20 mph, with gusts as high as 31 mph.  Chance of precipitation is 30%.

    High: 20 °F

    Chance Snow
    and Blustery

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around -1. Northwest wind 8 to 16 mph, with gusts as high as 28 mph.

    Low: -1 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 13. West wind 8 to 11 mph, with gusts as high as 21 mph.

    High: 13 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around -9. North wind around 7 mph.

    Low: -9 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around -8. Wind chill values as low as -30. Blustery, with a northwest wind 14 to 22 mph, with gusts as high as 37 mph.
M.L.King Day
Partly sunny and cold, with a high near 7. Wind chill values as low as -27. West wind 11 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around -8. Northwest wind 5 to 9 mph becoming west southwest after midnight.
Tuesday
A chance of snow after noon. Partly sunny, with a high near 15. South southwest wind 5 to 9 mph. Chance of precipitation is 30%.
Tuesday Night
A chance of snow before midnight. Mostly cloudy, with a low around 8. South southwest wind 6 to 11 mph becoming west northwest in the evening. Winds could gust as high as 21 mph. Chance of precipitation is 30%.
Wednesday
A chance of snow. Partly sunny, with a high near 20. Blustery, with a northwest wind 11 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 30%.
Wednesday Night
Mostly cloudy, with a low around -1. Northwest wind 8 to 16 mph, with gusts as high as 28 mph.
Thursday
Partly sunny, with a high near 13. West wind 8 to 11 mph, with gusts as high as 21 mph.
Thursday Night
Mostly cloudy, with a low around -9. North wind around 7 mph.
Friday
Mostly sunny and cold, with a high near -1.
Friday Night
Partly cloudy, with a low around -17.
Saturday
A slight chance of snow. Partly sunny and cold, with a high near -2. Chance of precipitation is 20%.
Saturday Night
A slight chance of snow. Mostly cloudy, with a low around -14. Chance of precipitation is 20%.
Sunday
A slight chance of snow. Partly sunny and cold, with a high near 6. Chance of precipitation is 20%.
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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)
11:36 pm CST Jan 18, 2026
12am CST Jan 19, 2026-6pm CST Jan 25, 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