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

Severe Weather in Florida and the Great Plains; Heavy Rainfall in Hawaii and the Gulf Coast

Scattered severe thunderstorms will continue over parts of the north-central Florida Peninsula and develop in the southern Great Plains. New daily record high temperatures are expected for portions of South Florida and southern Texas the next couple of days. Flash flooding is expected in Hawaii. On Thursday, rain may cause additional flooding across east Texas and Louisiana. Read More >

Hazardous Weather Conditions

Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Mostly Cloudy

75°F

24°C

Humidity 58%
Wind Speed W 6 mph
Barometer 29.84 in (1010.0 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 15 May 2:54 pm CDT
Extended Forecast for

Grafton IL

Flood Warning until May 21, 01:00am
Click here for hazard details and duration
Flood Warning
  •  
    Flood Warning until May 21, 01:00am

    NOW until 1:00am Tue

    Flood Warning

  • This Afternoon

    High: 75 °F

    Mostly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers after 4am. Partly cloudy, with a low around 61. North wind around 6 mph becoming calm.

    Low: 61 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 9am. Mostly cloudy, with a high near 74. South wind 5 to 9 mph. Chance of precipitation is 70%.

    High: 74 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Southwest wind around 6 mph.

    Low: 63 °F

    Chance
    T-storms

  • Friday

    Friday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 75. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 60%.

    High: 75 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 62.

    Low: 62 °F

    Chance
    T-storms

  • Saturday

    Saturday: A slight chance of showers, with thunderstorms also possible after 10am. Mostly sunny, with a high near 80. Chance of precipitation is 20%.

    High: 80 °F

    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 75. North wind around 6 mph.
Tonight
A 20 percent chance of showers after 4am. Partly cloudy, with a low around 61. North wind around 6 mph becoming calm.
Thursday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 9am. Mostly cloudy, with a high near 74. South wind 5 to 9 mph. Chance of precipitation is 70%.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Southwest wind around 6 mph.
Friday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 75. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 60%.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 62.
Saturday
A slight chance of showers, with thunderstorms also possible after 10am. Mostly sunny, with a high near 80. Chance of precipitation is 20%.
Saturday Night
Mostly clear, with a low around 63.
Sunday
Sunny, with a high near 82.
Sunday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 65.
Monday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Tuesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 63.
Wednesday
A 20 percent chance of showers. Mostly sunny, with a high near 81.
Click Map For Forecast
Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Grafton IL
 38.98°N 90.44°W (Elev. 515 ft)
Last Update:
2:37 pm CDT May 15, 2024
Forecast Valid:
3pm CDT May 15, 2024-6pm CDT May 22, 2024
 
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