Widespread Showers in the Eastern US; Severe Thunderstorms in the Plains; Heatwave in the Desert Southwest

Widespread showers and thunderstorms across much of the central and eastern U.S. will produce areas of excessive rainfall, especially in the southern Mid-Atlantic states. Scattered severe thunderstorms are expected from Montana into portions of the central/southern Plains this weekend. A heatwave will build in the Desert Southwest, in parts of Arizona, southeastern California, and southern Nevada. Read More >

Hazardous Weather Conditions

Current conditions at

Harlan, Harlan Municipal Airport (KHNR)

Lat: 41.58°NLon: 95.34°WElev: 1230ft.

Fair

79°F

26°C

Humidity 70%
Wind Speed SW 6 mph
Barometer 29.98 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 14 Jun 9:35 am CDT
Extended Forecast for

Portsmouth IA

  • Today

    Today: Sunny, with a high near 88. South wind 6 to 9 mph.

    High: 88 °F

    Sunny

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly between 2am and 4am.  Mostly cloudy, with a low around 67. South southeast wind 6 to 8 mph.  New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms after 7am.  Partly sunny, with a high near 84. South wind 6 to 10 mph, with gusts as high as 16 mph.  New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 40 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 65. Southwest wind 5 to 7 mph becoming southeast in the evening.  New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 65 °F

    Chance
    T-storms

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms, mainly after 1pm.  Partly sunny, with a high near 88. South wind 5 to 10 mph, with gusts as high as 18 mph.  New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 88 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am.  Partly cloudy, with a low around 66. South wind 6 to 9 mph, with gusts as high as 16 mph.  Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 66 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm.  Mostly cloudy, with a high near 82. Southeast wind 6 to 10 mph, with gusts as high as 17 mph.  Chance of precipitation is 60%.

    High: 82 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm.  Mostly cloudy, with a low around 63. Northeast wind around 8 mph becoming east southeast after midnight.

    Low: 63 °F

    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms.  Partly sunny, with a high near 79. North wind 8 to 11 mph, with gusts as high as 18 mph.

    High: 79 °F

    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 88. South wind 6 to 9 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly between 2am and 4am. Mostly cloudy, with a low around 67. South southeast wind 6 to 8 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
A 40 percent chance of showers and thunderstorms after 7am. Partly sunny, with a high near 84. South wind 6 to 10 mph, with gusts as high as 16 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Southwest wind 5 to 7 mph becoming southeast in the evening. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 88. South wind 5 to 10 mph, with gusts as high as 18 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 66. South wind 6 to 9 mph, with gusts as high as 16 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 82. Southeast wind 6 to 10 mph, with gusts as high as 17 mph. Chance of precipitation is 60%.
Tuesday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 63. Northeast wind around 8 mph becoming east southeast after midnight.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 79. North wind 8 to 11 mph, with gusts as high as 18 mph.
Wednesday Night
Mostly clear, with a low around 59. West wind 3 to 8 mph.
Juneteenth
Sunny, with a high near 84. West wind 3 to 8 mph.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 64. South wind 7 to 9 mph, with gusts as high as 16 mph.
Friday
Sunny, with a high near 87. South wind 10 to 17 mph, with gusts as high as 25 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth IA
 41.65°N 95.53°W (Elev. 1250 ft)
7:35 am CDT Jun 14, 2025
9am CDT Jun 14, 2025-6pm CDT Jun 20, 2025
 
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