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

Active Weather Pattern Expected From the Midwest to the Southern Plains; Dangerous Heat Likely in Southern Texas

A strong storm system will bring numerous to widespread severe thunderstorms across portions of the Midwest and Upper Great Lakes Tuesday. Tornadoes (a few strong), damaging winds and large hail are expected. Record high temperatures will be possible over southern Texas the next several days. This may lead to dangerous heat concerns especially for areas already without power. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Mostly Cloudy and Breezy

84°F

29°C

Humidity 55%
Wind Speed S 22 G 30 mph
Barometer 29.78 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 21 May 11:50 am CDT
Extended Forecast for

Gillespie IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 89. Breezy, with a south wind 21 to 24 mph, with gusts as high as 34 mph.

    High: 89 °F

    Mostly Sunny
    and Breezy

  • Tonight

    Tonight: Showers and thunderstorms, mainly before 1am. Low around 61. Breezy, with a south wind 17 to 22 mph becoming west 8 to 13 mph after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 90%.

    Low: 61 °F

    T-storms and
    Breezy then
    Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 75. West wind 6 to 8 mph. Chance of precipitation is 40%.

    High: 75 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61. North wind around 6 mph becoming calm in the evening.

    Low: 61 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 80. Light and variable wind becoming east around 6 mph in the morning.

    High: 80 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 1am, then a chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 64. Chance of precipitation is 50%.

    Low: 64 °F

    Chance
    T-storms

  • Friday

    Friday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 82. Chance of precipitation is 60%.

    High: 82 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 64.

    Low: 64 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 83.

    High: 83 °F

    Slight Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 89. Breezy, with a south wind 21 to 24 mph, with gusts as high as 34 mph.
Tonight
Showers and thunderstorms, mainly before 1am. Low around 61. Breezy, with a south wind 17 to 22 mph becoming west 8 to 13 mph after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 90%.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 75. West wind 6 to 8 mph. Chance of precipitation is 40%.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61. North wind around 6 mph becoming calm in the evening.
Thursday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 80. Light and variable wind becoming east around 6 mph in the morning.
Thursday Night
A chance of showers and thunderstorms before 1am, then a chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 64. Chance of precipitation is 50%.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 82. Chance of precipitation is 60%.
Friday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 64.
Saturday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 83.
Saturday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.
Sunday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 81. Chance of precipitation is 60%.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Memorial Day
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81.
Click Map For Forecast
Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Gillespie IL
 39.12°N 89.81°W (Elev. 653 ft)
Last Update:
11:52 am CDT May 21, 2024
Forecast Valid:
12pm CDT May 21, 2024-6pm CDT May 27, 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