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

Severe Thunderstorms in the Midwest and Arizona; Heat Continues in the Southeast and Southwest

Thunderstorms, some severe, may lead to scattered instances of flash flooding across the Midwest and Ohio Valley and southern Arizona. The threat will shift to the Mid-Atlantic coast on Thursday. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Rolla / Vichy, Rolla National Airport (KVIH)

Lat: 38.13°NLon: 91.77°WElev: 1148ft.

Fog

70°F

21°C

Humidity 100%
Wind Speed Calm
Barometer 29.95 in (1013.0 mb)
Dewpoint 70°F (21°C)
Visibility 0.25 mi
Last update 20 Aug 1:53 am CDT
Extended Forecast for

4 Miles W Mount Sterling MO

  • Overnight

    Overnight: Patchy fog after 3am. Otherwise, mostly clear, with a low around 68. Calm wind.

    Low: 68 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 8am. Otherwise, partly sunny, with a high near 82. Calm wind becoming north around 6 mph in the afternoon.

    High: 82 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 65. Light and variable wind.

    Low: 65 °F

    Mostly Clear

  • Friday

    Friday: Patchy fog before 8am. Otherwise, sunny, with a high near 88. Calm wind.

    High: 88 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 66. Calm wind.

    Low: 66 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 87.

    High: 87 °F

    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Sunday

    Sunday: A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 84. Chance of precipitation is 20%.

    High: 84 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 65.

    Low: 65 °F

    Slight Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Overnight
Patchy fog after 3am. Otherwise, mostly clear, with a low around 68. Calm wind.
Thursday
Patchy fog before 8am. Otherwise, partly sunny, with a high near 82. Calm wind becoming north around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 65. Light and variable wind.
Friday
Patchy fog before 8am. Otherwise, sunny, with a high near 88. Calm wind.
Friday Night
Mostly clear, with a low around 66. Calm wind.
Saturday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 87.
Saturday Night
Mostly clear, with a low around 65.
Sunday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 84. Chance of precipitation is 20%.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 65.
Monday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 85. Chance of precipitation is 20%.
Monday Night
A 20 percent chance of showers. Mostly clear, with a low around 68.
Tuesday
Mostly sunny, with a high near 89.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 68.
Wednesday
Mostly sunny, with a high near 89.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Mount Sterling MO
 38.45°N 91.69°W (Elev. 699 ft)
Last Update:
1:20 am CDT Aug 20, 2026
Forecast Valid:
2am CDT Aug 20, 2026-6pm CDT Aug 26, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation