Risks of Severe Thunderstorms and Excessive Rainfall; Fire Weather Concerns and Record Warmth

Severe thunderstorms and flash flooding risks increase across the center of the nation today. Meanwhile, ongoing thunderstorms and flash flooding will linger along the Gulf Coast states through the evening. The Great Basin and Intermountain West, warm temperatures and dry fuels with dry lightning may enhance fire weather potential. In addition, across interior Alaska, Red Flag Warning are posted. Read More >

Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Fair

77°F

25°C

Humidity 42%
Wind Speed W 9 mph
Barometer 29.96 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 20 Jun 5:44 pm CDT
Extended Forecast for

La Salle IL

Flood Warning June 20, 06:00pm until June 23, 04:00pm
Click here for hazard details and duration
Flood Warning
  •  
    Flood Warning June 20, 06:00pm until June 23, 04:00pm

    NOW until 4:00pm Tue

    Flood Warning

  • Tonight

    Low: 58 °F

    Partly Cloudy

  • Sunday

    Sunday: Showers and possibly a thunderstorm before 2pm, then showers between 2pm and 3pm, then showers and possibly a thunderstorm after 3pm. Some of the storms could produce heavy rainfall.  High near 70. East southeast wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph.  Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    High: 70 °F

    Showers
    Likely then
    Heavy Rain

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers.  Cloudy, with a low around 58. Breezy, with a north northeast wind 15 to 20 mph, with gusts as high as 25 mph.  Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 58 °F

    Showers
    Likely and
    Breezy

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 76. North northeast wind around 15 mph, with gusts as high as 20 mph.

    High: 76 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Mostly clear, with a low around 54. Northeast wind 5 to 10 mph.

    Low: 54 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms after 1am.  Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 1pm.  Mostly sunny, with a high near 78.

    High: 78 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 58. West northwest wind 5 to 10 mph becoming light and variable in the evening.
Sunday
Showers and possibly a thunderstorm before 2pm, then showers between 2pm and 3pm, then showers and possibly a thunderstorm after 3pm. Some of the storms could produce heavy rainfall. High near 70. East southeast wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Sunday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Cloudy, with a low around 58. Breezy, with a north northeast wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 76. North northeast wind around 15 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 54. Northeast wind 5 to 10 mph.
Tuesday
Sunny, with a high near 78.
Tuesday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 59.
Wednesday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 57.
Thursday
Mostly sunny, with a high near 77.
Thursday Night
Mostly clear, with a low around 57.
Friday
Mostly sunny, with a high near 80.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 60.
Saturday
A chance of showers. Mostly sunny, with a high near 81.
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ABOUT THIS FORECAST

 
Point Forecast:
La Salle IL
 41.34°N 89.09°W
2:52 pm CDT Jun 20, 2026
6pm CDT Jun 20, 2026-6pm CDT Jun 27, 2026
 
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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