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.

Mostly Cloudy

73°F

23°C

Humidity 78%
Wind Speed SW 17 mph
Barometer 29.71 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 13 Apr 11:55 am CDT
Extended Forecast for

Portsmouth IA

  • This Afternoon

    This Afternoon: Mostly cloudy, then gradually becoming sunny, with a high near 86. Breezy, with a south wind 17 to 22 mph, with gusts as high as 31 mph.

    High: 86 °F

    Decreasing
    Clouds and
    Breezy

  • Tonight

    Tonight: Partly cloudy, with a low around 52. South southwest wind 11 to 16 mph becoming light and variable after midnight. Winds could gust as high as 26 mph.

    Low: 52 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms before 4pm, then a slight chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 80. Light and variable wind becoming northeast 6 to 11 mph in the morning. Winds could gust as high as 17 mph. Chance of precipitation is 20%.

    High: 80 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 53. North northeast wind around 8 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 53 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 76. East wind 7 to 13 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers before 1am. Partly cloudy, with a low around 48. West southwest wind 6 to 9 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 48 °F

    Chance
    Showers

  • Thursday

    Thursday: Sunny, with a high near 79. South southwest wind 5 to 11 mph, with gusts as high as 17 mph.

    High: 79 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 58. South southeast wind 8 to 14 mph, with gusts as high as 22 mph.

    Low: 58 °F

    Partly Cloudy

  • Friday

    Friday: A chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79. Breezy, with a south wind 15 to 21 mph, with gusts as high as 30 mph.

    High: 79 °F

    Breezy.
    Partly Sunny
    then Chance
    T-storms

Detailed Forecast

This Afternoon
Mostly cloudy, then gradually becoming sunny, with a high near 86. Breezy, with a south wind 17 to 22 mph, with gusts as high as 31 mph.
Tonight
Partly cloudy, with a low around 52. South southwest wind 11 to 16 mph becoming light and variable after midnight. Winds could gust as high as 26 mph.
Tuesday
A slight chance of showers and thunderstorms before 4pm, then a slight chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 80. Light and variable wind becoming northeast 6 to 11 mph in the morning. Winds could gust as high as 17 mph. Chance of precipitation is 20%.
Tuesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 53. North northeast wind around 8 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 76. East wind 7 to 13 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A 30 percent chance of showers before 1am. Partly cloudy, with a low around 48. West southwest wind 6 to 9 mph. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Sunny, with a high near 79. South southwest wind 5 to 11 mph, with gusts as high as 17 mph.
Thursday Night
Partly cloudy, with a low around 58. South southeast wind 8 to 14 mph, with gusts as high as 22 mph.
Friday
A chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79. Breezy, with a south wind 15 to 21 mph, with gusts as high as 30 mph.
Friday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 34. Breezy, with a southwest wind 16 to 18 mph becoming north northwest after midnight. Winds could gust as high as 26 mph.
Saturday
A slight chance of rain and snow showers. Partly sunny, with a high near 49. Breezy, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Saturday Night
Mostly clear, with a low around 28. Northwest wind 6 to 15 mph, with gusts as high as 23 mph.
Sunday
Sunny, with a high near 56. West northwest wind 6 to 13 mph, with gusts as high as 18 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth IA
 41.65°N 95.5°W (Elev. 1319 ft)
Last Update:
11:42 am CDT Apr 13, 2026
Forecast Valid:
12pm CDT Apr 13, 2026-6pm CDT Apr 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation