Snow Squalls May Impact New Year's Eve Travel from the Great Lakes to the Mid-Atlantic; Heavy Rain & Isolated Severe Thunderstorms in Southern California

Snow squalls are likely to cross the Lower Great Lakes this evening and the Ohio Valley through the interior Northeast/northern Mid-Atlantic overnight, before potentially reaching the I-95 corridor from D.C. to New York City early New Year’s Day morning. Heavy rain and isolated severe thunderstorms will impact coastal southern California including Los Angeles tonight into early on New Year's Day. Read More >

Current conditions at

Harlan, Harlan Municipal Airport (KHNR)

Lat: 41.58°NLon: 95.34°WElev: 1230ft.

Fair

46°F

8°C

Humidity 62%
Wind Speed SW 8 mph
Barometer 29.89 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 31 Dec 3:55 pm CST
Extended Forecast for

Portsmouth IA

  • Tonight

    Tonight: Mostly cloudy, with a low around 17. North wind 6 to 11 mph becoming light northeast  after midnight. Winds could gust as high as 20 mph.

    Low: 17 °F

    Mostly Cloudy

  • New Year's Day

    New Year's Day: Mostly sunny, with a high near 33. Calm wind becoming south 5 to 8 mph in the morning.

    High: 33 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 21. Calm wind.

    Low: 21 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 32. Calm wind becoming east around 6 mph in the morning.

    High: 32 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 22. East wind around 5 mph becoming calm  in the evening.

    Low: 22 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 40. Calm wind becoming west southwest 5 to 7 mph in the morning.

    High: 40 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 23. Light and variable wind becoming southeast 5 to 7 mph after midnight.

    Low: 23 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 42. South wind 7 to 14 mph, with gusts as high as 21 mph.

    High: 42 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 29. South wind 5 to 10 mph, with gusts as high as 17 mph.

    Low: 29 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 17. North wind 6 to 11 mph becoming light northeast after midnight. Winds could gust as high as 20 mph.
New Year's Day
Mostly sunny, with a high near 33. Calm wind becoming south 5 to 8 mph in the morning.
Thursday Night
Mostly cloudy, with a low around 21. Calm wind.
Friday
Mostly cloudy, with a high near 32. Calm wind becoming east around 6 mph in the morning.
Friday Night
Mostly cloudy, with a low around 22. East wind around 5 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 40. Calm wind becoming west southwest 5 to 7 mph in the morning.
Saturday Night
Partly cloudy, with a low around 23. Light and variable wind becoming southeast 5 to 7 mph after midnight.
Sunday
Mostly cloudy, with a high near 42. South wind 7 to 14 mph, with gusts as high as 21 mph.
Sunday Night
Partly cloudy, with a low around 29. South wind 5 to 10 mph, with gusts as high as 17 mph.
Monday
Mostly sunny, with a high near 47. South southeast wind 5 to 7 mph.
Monday Night
Mostly cloudy, with a low around 30. Southeast wind around 5 mph becoming southwest after midnight.
Tuesday
Mostly sunny, with a high near 46. West southwest wind 5 to 9 mph becoming northwest in the afternoon. Winds could gust as high as 16 mph.
Tuesday Night
Partly cloudy, with a low around 26. West wind around 6 mph.
Wednesday
Mostly sunny, with a high near 46. Southwest wind 5 to 9 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth IA
 41.65°N 95.5°W (Elev. 1319 ft)
3:35 pm CST Dec 31, 2025
4pm CST Dec 31, 2025-6pm CST Jan 7, 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