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

Heavy Rainfall Continues in Hawaii; Severe Thunderstorms and Heavy Rainfall in the Plains and Southern Appalachians

Areas of gusty winds, heavy rain leading to flash flooding, and high surf continue across portions of Hawaii as Tropical Storm Lala continues to move away from the islands. Severe thunderstorms and heavy rainfall will shift into the southern Appalachians today. Strong to severe thunderstorms may produce large hail, scattered wind gusts, and heavy rain today across the northern and central Plains. Read More >

Current conditions at

Harlan, Harlan Municipal Airport (KHNR)

Lat: 41.58°NLon: 95.34°WElev: 1230ft.

Fair

61°F

16°C

Humidity 100%
Wind Speed Calm
Barometer 30.14 in
Dewpoint 61°F (16°C)
Visibility 7.00 mi
Last update 17 Aug 7:55 am CDT
Extended Forecast for

Walnut IA

  • Today

    Today: Patchy fog before 10am. Otherwise, mostly sunny, with a high near 80. Calm wind becoming west around 6 mph in the afternoon.

    High: 80 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: A 30 percent chance of showers after 5am. Increasing clouds, with a low around 65. South wind 5 to 8 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 65 °F

    Partly Cloudy
    then Chance
    Showers

  • Tuesday

    Tuesday: Showers and thunderstorms likely, mainly before 2pm, then showers likely and possibly a thunderstorm after 5pm. Partly sunny, with a high near 79. South southeast wind 5 to 7 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 63. Northeast wind 3 to 5 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 63 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: Partly sunny, with a high near 77. East northeast wind 3 to 6 mph.

    High: 77 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 60. East southeast wind around 5 mph becoming calm in the evening.

    Low: 60 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: Mostly sunny, with a high near 78. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 78 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 61. Light southeast wind.

    Low: 61 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 81. South southwest wind 3 to 7 mph.

    High: 81 °F

    Slight Chance
    T-storms

Detailed Forecast

Today
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 80. Calm wind becoming west around 6 mph in the afternoon.
Tonight
A 30 percent chance of showers after 5am. Increasing clouds, with a low around 65. South wind 5 to 8 mph. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Showers and thunderstorms likely, mainly before 2pm, then showers likely and possibly a thunderstorm after 5pm. Partly sunny, with a high near 79. South southeast wind 5 to 7 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
A 40 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 63. Northeast wind 3 to 5 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Partly sunny, with a high near 77. East northeast wind 3 to 6 mph.
Wednesday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 60. East southeast wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 78. Calm wind becoming southeast around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 61. Light southeast wind.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 81. South southwest wind 3 to 7 mph.
Friday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 62. Light south wind.
Saturday
Sunny, with a high near 79. Calm wind becoming north northwest around 6 mph in the morning.
Saturday Night
Mostly clear, with a low around 60. Light east wind.
Sunday
Mostly sunny, with a high near 77. East southeast wind 3 to 8 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Walnut IA
 41.5°N 95.23°W (Elev. 1355 ft)
Last Update:
7:35 am CDT Aug 17, 2026
Forecast Valid:
8am CDT Aug 17, 2026-6pm CDT Aug 23, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

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