Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

ONIDAMUNC (K98D)

Lat: 44.7°NLon: 100.1°WElev: 1874ft.

Fair

70°F

21°C

Humidity 88%
Wind Speed SE 12 mph
Barometer 29.98 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 18 Aug 10:15 pm CDT
Extended Forecast for

Gettysburg SD

  • Tonight

    Tonight: Mostly cloudy, with a low around 57. East wind 6 to 10 mph.

    Low: 57 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms after 4pm.  Mostly cloudy through mid morning, then gradual clearing, with a high near 81. East northeast wind 7 to 9 mph becoming south southwest in the afternoon.  Chance of precipitation is 20%.

    High: 81 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, mainly before 7pm.  Partly cloudy, with a low around 59. Southeast wind 8 to 10 mph becoming south southwest in the evening.  Chance of precipitation is 30%.

    Low: 59 °F

    Chance
    T-storms then
    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 86. South southwest wind 8 to 11 mph becoming north northwest in the afternoon. Winds could gust as high as 22 mph.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 59. North northeast wind 6 to 9 mph.

    Low: 59 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 84. Northeast wind 7 to 10 mph.

    High: 84 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 58. East northeast wind around 10 mph.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 81. East southeast wind 10 to 14 mph.

    High: 81 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms after 1am.  Mostly cloudy, with a low around 60. East southeast wind 15 to 17 mph.  Chance of precipitation is 40%.

    Low: 60 °F

    Partly Cloudy
    then Chance
    T-storms

Detailed Forecast

Tonight
Mostly cloudy, with a low around 57. East wind 6 to 10 mph.
Wednesday
A slight chance of showers and thunderstorms after 4pm. Mostly cloudy through mid morning, then gradual clearing, with a high near 81. East northeast wind 7 to 9 mph becoming south southwest in the afternoon. Chance of precipitation is 20%.
Wednesday Night
A chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 59. Southeast wind 8 to 10 mph becoming south southwest in the evening. Chance of precipitation is 30%.
Thursday
Sunny, with a high near 86. South southwest wind 8 to 11 mph becoming north northwest in the afternoon. Winds could gust as high as 22 mph.
Thursday Night
Mostly clear, with a low around 59. North northeast wind 6 to 9 mph.
Friday
Sunny, with a high near 84. Northeast wind 7 to 10 mph.
Friday Night
Mostly clear, with a low around 58. East northeast wind around 10 mph.
Saturday
Mostly sunny, with a high near 81. East southeast wind 10 to 14 mph.
Saturday Night
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 60. East southeast wind 15 to 17 mph. Chance of precipitation is 40%.
Sunday
A slight chance of showers and thunderstorms. Mostly cloudy, with a high near 82. Breezy. Chance of precipitation is 20%.
Sunday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 61. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 85.
Monday Night
Mostly clear, with a low around 61.
Tuesday
Mostly sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
Gettysburg SD
 44.98°N 99.96°W (Elev. 2057 ft)
10:36 pm CDT Aug 18, 2026
10pm CDT Aug 18, 2026-6pm CDT Aug 25, 2026
 
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Additional Resources

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