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

Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Current conditions at

Harlan, Harlan Municipal Airport (KHNR)

Lat: 41.58°NLon: 95.34°WElev: 1230ft.

Fair

79°F

26°C

Humidity 58%
Wind Speed NW 7 mph
Barometer 30.14 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 27 Aug 1:15 pm CDT
Extended Forecast for

Irwin IA

  • This Afternoon

    This Afternoon: Sunny, with a high near 82. North northwest wind 3 to 5 mph.

    High: 82 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 59. Calm wind.

    Low: 59 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 85. Calm wind becoming south 5 to 9 mph in the morning.

    High: 85 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly between 3am and 5am. Increasing clouds, with a low around 68. South wind 8 to 13 mph, with gusts as high as 23 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Partly Cloudy
    then Chance
    T-storms

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms, mainly between 7am and 1pm. Mostly sunny, with a high near 89. Breezy, with a south southeast wind 15 to 18 mph, with gusts as high as 26 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 89 °F

    Chance
    T-storms then
    Chance
    Showers and
    Breezy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 76. South wind 13 to 15 mph, with gusts as high as 24 mph.

    Low: 76 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 94. South southwest wind 11 to 14 mph, with gusts as high as 22 mph.

    High: 94 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74. South southwest wind 8 to 10 mph, with gusts as high as 17 mph.

    Low: 74 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: A slight chance of showers and thunderstorms. Partly sunny, with a high near 90. South southwest wind around 8 mph.

    High: 90 °F

    Slight Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny, with a high near 82. North northwest wind 3 to 5 mph.
Tonight
Mostly clear, with a low around 59. Calm wind.
Friday
Mostly sunny, with a high near 85. Calm wind becoming south 5 to 9 mph in the morning.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly between 3am and 5am. Increasing clouds, with a low around 68. South wind 8 to 13 mph, with gusts as high as 23 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
A 30 percent chance of showers and thunderstorms, mainly between 7am and 1pm. Mostly sunny, with a high near 89. Breezy, with a south southeast wind 15 to 18 mph, with gusts as high as 26 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Partly cloudy, with a low around 76. South wind 13 to 15 mph, with gusts as high as 24 mph.
Sunday
Mostly sunny, with a high near 94. South southwest wind 11 to 14 mph, with gusts as high as 22 mph.
Sunday Night
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74. South southwest wind 8 to 10 mph, with gusts as high as 17 mph.
Monday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 90. South southwest wind around 8 mph.
Monday Night
A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 71. Southeast wind around 5 mph becoming calm in the evening.
Tuesday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 89. Calm wind becoming south 5 to 7 mph in the morning.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 70. Light southeast wind.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 90. Calm wind becoming south 5 to 7 mph in the morning.
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ABOUT THIS FORECAST

 
Point Forecast:
Irwin IA
 41.79°N 95.21°W (Elev. 1247 ft)
Last Update:
1:26 pm CDT Aug 27, 2026
Forecast Valid:
1pm CDT Aug 27, 2026-6pm CDT Sep 2, 2026
 
Forecast Discussion
 
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Additional Resources

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Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation