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 >

Current conditions at

Decorah (KDEH)

Lat: 43.28°NLon: 91.73°WElev: 1158ft.

Overcast with Haze

-6°F

-21°C

Humidity 70%
Wind Speed NW 15 G 26 mph
Barometer 30.15 in
Dewpoint -13°F (-25°C)
Visibility 5.00 mi
Wind Chill-27°F (-33°C)
Last update 19 Jan 5:35 am CST
Extended Forecast for

Calmar IA

Cold Weather Advisory January 19, 05:56am until January 19, 12:00pm
Click here for hazard details and duration
Cold Weather Advisory
  •  
    Cold Weather Advisory January 19, 05:56am until January 19, 12:00pm

    NOW until 12:00pm Mon

    Cold Weather Advisory

  • M.L.King Day

    High: 2 °F

    Patchy
    Blowing Snow
    and Blustery

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around -5. Wind chill values as low as -16. West wind 5 to 10 mph, with gusts as high as 18 mph.

    Low: -5 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Increasing clouds, with a high near 14. Wind chill values as low as -16. West wind 5 to 7 mph becoming south in the afternoon.

    High: 14 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Snow, mainly before midnight.  Low around 8. Wind chill values as low as -2. South wind around 7 mph becoming northwest after midnight.  Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

    Low: 8 °F

    Snow then
    Chance Snow

  • Wednesday

    Wednesday: A 40 percent chance of snow after noon.  Partly sunny, with a high near 23. West wind 7 to 14 mph.  New snow accumulation of less than a half inch possible.

    High: 23 °F

    Partly Sunny
    then Chance
    Snow

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 1. Northwest wind 10 to 14 mph, with gusts as high as 23 mph.

    Low: 1 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 12. West wind 9 to 11 mph.

    High: 12 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -12. Northwest wind 8 to 10 mph.

    Low: -12 °F

    Partly Cloudy

Detailed Forecast

M.L.King Day
Patchy blowing snow before 9am. Partly sunny and cold, with a high near 2. Wind chill values as low as -31. Blustery, with a northwest wind 11 to 20 mph, with gusts as high as 33 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around -5. Wind chill values as low as -16. West wind 5 to 10 mph, with gusts as high as 18 mph.
Tuesday
Increasing clouds, with a high near 14. Wind chill values as low as -16. West wind 5 to 7 mph becoming south in the afternoon.
Tuesday Night
Snow, mainly before midnight. Low around 8. Wind chill values as low as -2. South wind around 7 mph becoming northwest after midnight. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.
Wednesday
A 40 percent chance of snow after noon. Partly sunny, with a high near 23. West wind 7 to 14 mph. New snow accumulation of less than a half inch possible.
Wednesday Night
Partly cloudy, with a low around 1. Northwest wind 10 to 14 mph, with gusts as high as 23 mph.
Thursday
Partly sunny, with a high near 12. West wind 9 to 11 mph.
Thursday Night
Partly cloudy, with a low around -12. Northwest wind 8 to 10 mph.
Friday
Mostly sunny and cold, with a high near -5. Northwest wind around 10 mph.
Friday Night
Mostly clear, with a low around -20. Northwest wind 6 to 8 mph.
Saturday
Sunny and cold, with a high near -4. Northwest wind around 7 mph becoming southwest in the afternoon.
Saturday Night
A 20 percent chance of snow. Partly cloudy, with a low around -12. South wind around 6 mph.
Sunday
Mostly sunny, with a high near 8. Southwest wind 6 to 9 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Calmar IA
 43.17°N 91.86°W
5:21 am CST Jan 19, 2026
5am CST Jan 19, 2026-6pm CST Jan 25, 2026
 
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Additional Resources

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