Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Hazardous Weather Conditions

Current conditions at

Chicago / Wheeling, Pal-Waukee Airport (KPWK)

Lat: 42.12°NLon: 87.9°WElev: 646ft.

A Few Clouds

67°F

19°C

Humidity 93%
Wind Speed W 3 mph
Barometer 29.91 in (1012.5 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 19 Aug 12:52 am CDT
Extended Forecast for

Deer Park IL

  • Overnight

    Overnight: Patchy fog.  Otherwise, mostly cloudy, with a low around 64. Northwest wind around 5 mph.

    Low: 64 °F

    Patchy Fog

  • Wednesday

    Wednesday: A 20 percent chance of showers after 2pm.  Patchy fog before 8am.  Otherwise, partly sunny, with a high near 78. Northwest wind 5 to 10 mph becoming northeast in the afternoon.

    High: 78 °F

    Patchy Fog
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 61. East northeast wind around 5 mph becoming north northwest after midnight.

    Low: 61 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 80. Calm wind becoming east around 5 mph in the afternoon.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 62. East wind around 5 mph becoming south southwest after midnight.

    Low: 62 °F

    Partly Cloudy

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms, mainly after 1pm.  Mostly sunny, with a high near 78.

    High: 78 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms before 1am.  Partly cloudy, with a low around 64.

    Low: 64 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

Detailed Forecast

Overnight
Patchy fog. Otherwise, mostly cloudy, with a low around 64. Northwest wind around 5 mph.
Wednesday
A 20 percent chance of showers after 2pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 78. Northwest wind 5 to 10 mph becoming northeast in the afternoon.
Wednesday Night
Partly cloudy, with a low around 61. East northeast wind around 5 mph becoming north northwest after midnight.
Thursday
Sunny, with a high near 80. Calm wind becoming east around 5 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 62. East wind around 5 mph becoming south southwest after midnight.
Friday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 78.
Friday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 64.
Saturday
Mostly sunny, with a high near 79.
Saturday Night
Mostly clear, with a low around 60.
Sunday
Mostly sunny, with a high near 76.
Sunday Night
Partly cloudy, with a low around 58.
Monday
Mostly sunny, with a high near 76.
Monday Night
Partly cloudy, with a low around 61.
Tuesday
Mostly sunny, with a high near 79.
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ABOUT THIS FORECAST

 
Point Forecast:
Deer Park IL
 42.16°N 88.1°W
1:21 am CDT Aug 19, 2026
1am CDT Aug 19, 2026-6pm CDT Aug 25, 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