Risks of Severe Thunderstorms and Excessive Rainfall in the Central U.S.; Fire Weather Concerns in Alaska and Southwest

An expansive storm system will bring widespread storms with a threat for flash flooding and severe weather to much of the central to eastern U.S. into early this week. Critical fire weather conditions are expected across interior Alaska this weekend. Elevated fire conditions also expected in the Southwest U.S.. Conditions will remain uncomfortably hot across the southern Plains and the Southeast. Read More >

Hazardous Weather Conditions

Current conditions at

Pontiac Municipal Airport (KPNT)

Lat: 40.92°NLon: 88.62°WElev: 650ft.

Fair

59°F

15°C

Humidity 99%
Wind Speed NA
Barometer 29.95 in
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 21 Jun 2:15 am CDT
Extended Forecast for

Cullom IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 60. Calm wind.

    Low: 60 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers likely, then showers and possibly a thunderstorm after 1pm. Some of the storms could produce heavy rainfall.  High near 71. Light southeast wind becoming east 10 to 15 mph in the morning. Winds could gust as high as 25 mph.  Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    High: 71 °F

    Chance
    Showers then
    Heavy Rain

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 10pm, then showers likely. Some of the storms could produce heavy rainfall.  Low around 59. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 90%. New precipitation amounts between 1 and 2 inches possible.

    Low: 59 °F

    Heavy Rain
    then Chance
    Showers

  • Monday

    Monday: A 20 percent chance of showers before 1pm.  Cloudy, then gradually becoming mostly sunny, with a high near 74. North northeast wind around 15 mph, with gusts as high as 25 mph.

    High: 74 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 51. North northeast wind 5 to 10 mph becoming light north  in the evening. Winds could gust as high as 15 mph.

    Low: 51 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 60. Calm wind.
Sunday
Showers likely, then showers and possibly a thunderstorm after 1pm. Some of the storms could produce heavy rainfall. High near 71. Light southeast wind becoming east 10 to 15 mph in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Sunday Night
Showers and possibly a thunderstorm before 10pm, then showers likely. Some of the storms could produce heavy rainfall. Low around 59. North northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between 1 and 2 inches possible.
Monday
A 20 percent chance of showers before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 74. North northeast wind around 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 51. North northeast wind 5 to 10 mph becoming light north in the evening. Winds could gust as high as 15 mph.
Tuesday
Sunny, with a high near 77.
Tuesday Night
Mostly clear, with a low around 56.
Wednesday
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 79.
Wednesday Night
Partly cloudy, with a low around 59.
Thursday
Mostly sunny, with a high near 79.
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 and thunderstorms. Mostly sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
Cullom IL
 40.87°N 88.27°W
1:31 am CDT Jun 21, 2026
2am CDT Jun 21, 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