Heat Wave Persists Over the Central U.S.; Significant Flooding Expected in the Northern Mid-Atlantic Tuesday

Dangerous and extreme heat will remain across portions of the Central U.S. this week, persisting across the Mid to Lower Mississippi Valleys, Gulf Coast, Southern Plains and portions of Texas. A heat wave over the Southwest will intensify late this week. Severe thunderstorms and flash flooding will spread from the Great Lakes/Ohio Valley to the Mid-Atlantic and Northeast the next few days. Read More >

Hazardous Weather Conditions

Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Partly Cloudy

84°F

29°C

Humidity 89%
Wind Speed SW 6 mph
Barometer 29.68 in
Dewpoint 81°F (27°C)
Visibility 10.00 mi
Heat Index98°F (37°C)
Last update 27 Jul 10:03 pm CDT
Extended Forecast for

4 Miles SSE Sublette IL

  • Tonight

    Tonight: Patchy smoke between 11pm and 1am. Increasing clouds, with a low around 68. West wind around 10 mph becoming north after midnight. Winds could gust as high as 20 mph.

    Low: 68 °F

    Patchy Smoke

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83. North wind around 10 mph, with gusts as high as 20 mph.

    High: 83 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 61. Northeast wind around 5 mph becoming calm  after midnight.

    Low: 61 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 83. Calm wind becoming north around 5 mph in the afternoon.

    High: 83 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 64.

    Low: 64 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy

  • Friday

    Friday: A 50 percent chance of showers.  Partly sunny, with a high near 81.

    High: 81 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers, with thunderstorms also possible after 1am.  Mostly cloudy, with a low around 66. Chance of precipitation is 50%.

    Low: 66 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Tonight
Patchy smoke between 11pm and 1am. Increasing clouds, with a low around 68. West wind around 10 mph becoming north after midnight. Winds could gust as high as 20 mph.
Tuesday
Mostly sunny, with a high near 83. North wind around 10 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 61. Northeast wind around 5 mph becoming calm after midnight.
Wednesday
Sunny, with a high near 83. Calm wind becoming north around 5 mph in the afternoon.
Wednesday Night
Clear, with a low around 64.
Thursday
Sunny, with a high near 85.
Thursday Night
Partly cloudy, with a low around 66.
Friday
A 50 percent chance of showers. Partly sunny, with a high near 81.
Friday Night
A chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 50%.
Saturday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 80. Chance of precipitation is 50%.
Saturday Night
Partly cloudy, with a low around 64.
Sunday
Sunny, with a high near 82.
Sunday Night
Mostly clear, with a low around 62.
Monday
Sunny, with a high near 84.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Sublette IL
 41.59°N 89.22°W (Elev. 801 ft)
9:52 pm CDT Jul 27, 2026
10pm CDT Jul 27, 2026-6pm CDT Aug 3, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database