Lala Impacting Hawaii; Flash Flooding Risks; Excessive Heat

Lala will continue to impact Hawaii through the weekend. Heavy rainfall, strong winds, dangerous surf and localized flooding are expected. Thunderstorms, heavy rainfall and flash flooding concerns from the mid-Mississippi Valley, Ohio Valley into the central Appalachians and the mid-Atlantic through today. Record heat continues for areas of the Mississippi Valley into the Southeast. Read More >

Hazardous Weather Conditions

Current conditions at

Oelwein Municipal Airport (KOLZ)

Lat: 42.68°NLon: 91.98°WElev: 1070ft.

Overcast

73°F

23°C

Humidity 100%
Wind Speed NW 13 mph
Barometer 30.05 in
Dewpoint 73°F (23°C)
Visibility 9.00 mi
Last update 16 Aug 8:35 am CDT
Extended Forecast for

Sumner IA

  • Today

    Today: Patchy fog before 9am.  Otherwise, partly sunny, with a high near 77. North northwest wind 6 to 14 mph, with gusts as high as 20 mph.

    High: 77 °F

    Patchy Fog
    then Partly
    Sunny

  • Tonight

    Tonight: Patchy fog after 3am.  Otherwise, mostly clear, with a low around 60. Northwest wind 5 to 10 mph.

    Low: 60 °F

    Partly Cloudy
    then Patchy
    Fog

  • Monday

    Monday: Patchy fog before 8am.  Otherwise, sunny, with a high near 78. Calm wind becoming west 5 to 7 mph in the afternoon.

    High: 78 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: A chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am.  Partly cloudy, with a low around 64. Southwest wind 3 to 7 mph.  Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 64 °F

    Partly Cloudy
    then Chance
    Showers

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms after 1pm.  Partly sunny, with a high near 78. West wind 6 to 8 mph.  New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 60. Chance of precipitation is 50%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 60 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, partly sunny, with a high near 77. North northwest wind 6 to 14 mph, with gusts as high as 20 mph.
Tonight
Patchy fog after 3am. Otherwise, mostly clear, with a low around 60. Northwest wind 5 to 10 mph.
Monday
Patchy fog before 8am. Otherwise, sunny, with a high near 78. Calm wind becoming west 5 to 7 mph in the afternoon.
Monday Night
A chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Partly cloudy, with a low around 64. Southwest wind 3 to 7 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 78. West wind 6 to 8 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. Chance of precipitation is 50%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday
Mostly sunny, with a high near 73.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Mostly sunny, with a high near 74.
Thursday Night
Partly cloudy, with a low around 59.
Friday
A 30 percent chance of showers. Mostly sunny, with a high near 77.
Friday Night
Partly cloudy, with a low around 61.
Saturday
Mostly sunny, with a high near 77.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Sumner IA
 42.85°N 92.1°W
7:56 am CDT Aug 16, 2026
8am CDT Aug 16, 2026-6pm CDT Aug 22, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database