National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Harlan, Harlan Municipal Airport (KHNR)

Lat: 41.58°NLon: 95.34°WElev: 1230ft.

Fair

39°F

4°C

Humidity 48%
Wind Speed NW 16 G 23 mph
Barometer 30.03 in
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 13 Mar 12:15 pm CDT
Extended Forecast for

Portsmouth IA

High Wind Watch March 15, 07:00am until March 16, 01:00am
Winter Storm Watch March 15, 07:00am until March 16, 01:00am
Click here for hazard details and duration
High Wind Watch
Winter Storm Watch

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 45. Northwest wind 10 to 14 mph, with gusts as high as 21 mph.

    High: 45 °F

    Partly Sunny

  • Tonight

    Tonight: A 20 percent chance of snow showers after midnight. Mostly cloudy, with a low around 28. Light and variable wind becoming east 5 to 10 mph in the evening. Winds could gust as high as 17 mph.

    Low: 28 °F

    Mostly Cloudy
    then Slight
    Chance Snow
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 55. Southeast wind 11 to 17 mph, with gusts as high as 25 mph.

    High: 55 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 50 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 31. Breezy, with an east southeast wind 13 to 18 mph, with gusts as high as 26 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 31 °F

    Slight Chance
    Showers then
    Chance
    Showers and
    Breezy

  • Sunday

    Sunday: Snow showers, possibly mixed with rain, becoming all snow after 1pm. Widespread blowing snow, mainly after 4pm. High near 44. Very windy, with a north northwest wind 18 to 23 mph increasing to 31 to 36 mph in the afternoon. Winds could gust as high as 50 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 44 °F

    Rain/Snow and
    Blowing Snow

  • Sunday Night

    Sunday Night: A 30 percent chance of snow showers before 1am. Widespread blowing snow, mainly before 1am. Mostly cloudy, with a low around 4. Windy, with a north northwest wind 26 to 34 mph, with gusts as high as 48 mph.

    Low: 4 °F

    Chance Snow
    Showers and
    Blowing Snow

  • Monday

    Monday: Patchy blowing snow before 7am. Sunny, with a high near 20. Blustery, with a northwest wind 20 to 23 mph, with gusts as high as 32 mph.

    High: 20 °F

    Blustery.
    Patchy
    Blowing Snow
    then Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 3. North northwest wind 9 to 14 mph becoming light after midnight. Winds could gust as high as 20 mph.

    Low: 3 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of snow showers after 1pm. Mostly cloudy, with a high near 37. South wind 5 to 14 mph, with gusts as high as 22 mph.

    High: 37 °F

    Partly Sunny
    then Slight
    Chance Snow
    Showers

Detailed Forecast

This Afternoon
Partly sunny, with a high near 45. Northwest wind 10 to 14 mph, with gusts as high as 21 mph.
Tonight
A 20 percent chance of snow showers after midnight. Mostly cloudy, with a low around 28. Light and variable wind becoming east 5 to 10 mph in the evening. Winds could gust as high as 17 mph.
Saturday
Mostly sunny, with a high near 55. Southeast wind 11 to 17 mph, with gusts as high as 25 mph.
Saturday Night
A 50 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 31. Breezy, with an east southeast wind 13 to 18 mph, with gusts as high as 26 mph. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Snow showers, possibly mixed with rain, becoming all snow after 1pm. Widespread blowing snow, mainly after 4pm. High near 44. Very windy, with a north northwest wind 18 to 23 mph increasing to 31 to 36 mph in the afternoon. Winds could gust as high as 50 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
A 30 percent chance of snow showers before 1am. Widespread blowing snow, mainly before 1am. Mostly cloudy, with a low around 4. Windy, with a north northwest wind 26 to 34 mph, with gusts as high as 48 mph.
Monday
Patchy blowing snow before 7am. Sunny, with a high near 20. Blustery, with a northwest wind 20 to 23 mph, with gusts as high as 32 mph.
Monday Night
Partly cloudy, with a low around 3. North northwest wind 9 to 14 mph becoming light after midnight. Winds could gust as high as 20 mph.
Tuesday
A slight chance of snow showers after 1pm. Mostly cloudy, with a high near 37. South wind 5 to 14 mph, with gusts as high as 22 mph.
Tuesday Night
A slight chance of rain and snow showers before 1am. Mostly cloudy, with a low around 28. South wind 7 to 10 mph, with gusts as high as 17 mph.
Wednesday
Mostly sunny, with a high near 62. West northwest wind 6 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 36. Light and variable wind becoming west southwest around 5 mph after midnight.
Thursday
Mostly sunny, with a high near 70. South southwest wind 5 to 9 mph, with gusts as high as 16 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth IA
 41.65°N 95.5°W (Elev. 1319 ft)
Last Update:
11:47 am CDT Mar 13, 2026
Forecast Valid:
12pm CDT Mar 13, 2026-6pm CDT Mar 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation