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

Excessive Rainfall and Potential Tropical Cyclone in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce locally considerable flash flooding over parts of the northwestern Gulf Coast, lower Mississippi River Valley, and Deep South through Thursday. Potential Tropical Cyclone One is forecast to become a tropical storm (Arthur) as it moves along or just off the northwestern Gulf coast through Wednesday. An outbreak of severe weather is forecast in the Midwest Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

Dayton, Cox Dayton International Airport (KDAY)

Lat: 39.91°NLon: 84.22°WElev: 1007ft.

Partly Cloudy

69°F

21°C

Humidity 57%
Wind Speed SW 10 mph
Barometer 29.76 in (1007.2 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 17 Jun 9:56 am EDT
Extended Forecast for

Vandalia OH

  • Today

    Today: A chance of showers and thunderstorms, mainly after 5pm. Increasing clouds, with a high near 81. Southwest wind 7 to 13 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Sunny then
    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely before 11pm, then showers and possibly a thunderstorm between 11pm and 3am, then a chance of showers and thunderstorms after 3am. Some of the storms could produce heavy rainfall. Low around 68. Breezy, with a south wind 21 to 24 mph, with gusts as high as 38 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 68 °F

    Heavy Rain
    and Breezy

  • Thursday

    Thursday: Sunny, with a high near 79. West wind 16 to 18 mph, with gusts as high as 33 mph.

    High: 79 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 58. West wind 5 to 9 mph becoming light northwest after midnight.

    Low: 58 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Sunny, with a high near 77. West wind 6 to 14 mph.

    High: 77 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 80. Chance of precipitation is 50%.

    High: 80 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
A chance of showers and thunderstorms, mainly after 5pm. Increasing clouds, with a high near 81. Southwest wind 7 to 13 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms likely before 11pm, then showers and possibly a thunderstorm between 11pm and 3am, then a chance of showers and thunderstorms after 3am. Some of the storms could produce heavy rainfall. Low around 68. Breezy, with a south wind 21 to 24 mph, with gusts as high as 38 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday
Sunny, with a high near 79. West wind 16 to 18 mph, with gusts as high as 33 mph.
Thursday Night
Partly cloudy, with a low around 58. West wind 5 to 9 mph becoming light northwest after midnight.
Juneteenth
Sunny, with a high near 77. West wind 6 to 14 mph.
Friday Night
Mostly clear, with a low around 57.
Saturday
Sunny, with a high near 80.
Saturday Night
Partly cloudy, with a low around 61.
Sunday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 80. Chance of precipitation is 50%.
Sunday Night
Showers likely and possibly a thunderstorm, then showers after 8pm. Low around 65. Chance of precipitation is 80%.
Monday
Showers and thunderstorms. High near 79. Chance of precipitation is 80%.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 60. Chance of precipitation is 30%.
Tuesday
Mostly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Vandalia OH
 39.88°N 84.19°W (Elev. 909 ft)
Last Update:
4:00 am EDT Jun 17, 2026
Forecast Valid:
10am EDT Jun 17, 2026-6pm EDT Jun 23, 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