Powerful Winter Storm from the Upper Midwest into the Northeast; Severe Thunderstorms in the Midwest and Ohio Valley

A rapidly-intensifying storm is expected to bring heavy snow, blizzard conditions, and icing from the Upper Midwest through the Great Lakes and Northeast. Scattered severe thunderstorms may produce severe/damaging wind gusts and a couple of tornadoes across parts of the Midwest and lower Ohio Valley through the evening. Arctic air will expand across the central and southern U.S.. Read More >

Hazardous Weather Conditions

Current conditions at

Harlan, Harlan Municipal Airport (KHNR)

Lat: 41.58°NLon: 95.34°WElev: 1230ft.

Partly Cloudy and Breezy

7°F

-14°C

Humidity 72%
Wind Speed NW 23 G 35 mph
Barometer 30.19 in
Dewpoint 0°F (-18°C)
Visibility 10.00 mi
Wind Chill-14°F (-26°C)
Last update 28 Dec 11:35 pm CST
Extended Forecast for

Portsmouth IA

  • Tonight

    Tonight: A chance of flurries between 2am and 3am.  Mostly cloudy, with a low around 7. Wind chill values as low as -16. Windy, with a northwest wind 26 to 29 mph, with gusts as high as 45 mph.

    Low: 7 °F

    Chance
    Flurries and
    Windy

  • Monday

    Monday: Mostly sunny, with a high near 18. Wind chill values as low as -14. Windy, with a northwest wind 21 to 26 mph decreasing to 8 to 13 mph in the afternoon. Winds could gust as high as 40 mph.

    High: 18 °F

    Mostly Sunny
    and Windy

  • Monday Night

    Monday Night: Mostly clear, with a low around 10. Northwest wind around 6 mph becoming calm.

    Low: 10 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 36. West southwest wind 5 to 11 mph, with gusts as high as 17 mph.

    High: 36 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 22. Northwest wind around 6 mph.

    Low: 22 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 37. West northwest wind 5 to 7 mph becoming northeast in the afternoon.

    High: 37 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 14. North northeast wind 5 to 7 mph.

    Low: 14 °F

    Mostly Cloudy

  • New Year's Day

    New Year's Day: Mostly sunny, with a high near 28. North northeast wind 5 to 7 mph.

    High: 28 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 17. Light and variable wind.

    Low: 17 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A chance of flurries between 2am and 3am. Mostly cloudy, with a low around 7. Wind chill values as low as -16. Windy, with a northwest wind 26 to 29 mph, with gusts as high as 45 mph.
Monday
Mostly sunny, with a high near 18. Wind chill values as low as -14. Windy, with a northwest wind 21 to 26 mph decreasing to 8 to 13 mph in the afternoon. Winds could gust as high as 40 mph.
Monday Night
Mostly clear, with a low around 10. Northwest wind around 6 mph becoming calm.
Tuesday
Mostly sunny, with a high near 36. West southwest wind 5 to 11 mph, with gusts as high as 17 mph.
Tuesday Night
Partly cloudy, with a low around 22. Northwest wind around 6 mph.
Wednesday
Partly sunny, with a high near 37. West northwest wind 5 to 7 mph becoming northeast in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 14. North northeast wind 5 to 7 mph.
New Year's Day
Mostly sunny, with a high near 28. North northeast wind 5 to 7 mph.
Thursday Night
Mostly cloudy, with a low around 17. Light and variable wind.
Friday
Partly sunny, with a high near 34. Light and variable wind becoming south southwest 5 to 7 mph in the morning.
Friday Night
Mostly cloudy, with a low around 19. Northeast wind around 6 mph becoming light and variable in the evening.
Saturday
Mostly sunny, with a high near 36. Light southwest wind becoming west southwest 5 to 10 mph in the morning. Winds could gust as high as 17 mph.
Saturday Night
Partly cloudy, with a low around 19. South wind around 7 mph.
Sunday
Mostly sunny, with a high near 36. South wind 7 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 17 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth IA
 41.65°N 95.5°W (Elev. 1319 ft)
10:02 pm CST Dec 28, 2025
11pm CST Dec 28, 2025-6pm CST Jan 4, 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