Dangerous heat and humidity from the central U.S. to East Coast this weekend

Hot and very humid conditions will push the heat index to well over 100 degrees across a large portion of the central and eastern U.S. Excessive Heat Warnings and Heat Advisories are in effect for much of the Plains, Miss. Valley, Midwest, Ohio Valley, Mid-Atlantic and southern states. Be very cautious if you must do outdoor activities in these areas during the afternoon and evening this weekend. Read More >

Current conditions at

Chicago / Wheeling, Pal-Waukee Airport (KPWK)

Lat: 42.12°NLon: 87.9°WElev: 646ft.

Thunderstorm in Vicinity Light Rain

72°F

22°C

Humidity 87%
Wind Speed E 8 mph
Barometer 29.95 in (1013.8 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 23 Jul 7:52 pm CDT
Extended Forecast for

Crystal Lake IL

Severe T-storm Watch until July 23, 10:00pm
Click here for hazard details and duration
...
  •  
    Severe T-storm Watch until July 23, 10:00pm

    NOW until
    10:00pm Sat

    Severe T-storm Watch

  • Tonight

    Tonight: Showers and thunderstorms, mainly before 10pm. Some storms could be severe, with heavy rain.  Low around 76. South southeast wind 5 to 10 mph.  Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    Severe
    Thunderstorms

    Low: 76 °F

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms.  Partly sunny, with a high near 91. Heat index values as high as 103. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Chance
    T-storms

    High: 91 °F

  • Sunday
    Night

    Sunday Night: Mostly cloudy, with a low around 69. Northwest wind 5 to 10 mph.

    Mostly Cloudy

    Low: 69 °F

  • Monday

    Monday: Sunny, with a high near 86. Northwest wind 5 to 10 mph.

    Sunny

    High: 86 °F

  • Monday
    Night

    Monday Night: Mostly clear, with a low around 65. Northwest wind around 5 mph.

    Mostly Clear

    Low: 65 °F

  • Tuesday

    Tuesday: Sunny, with a high near 86.

    Sunny

    High: 86 °F

  • Tuesday
    Night

    Tuesday Night: Partly cloudy, with a low around 68.

    Partly Cloudy

    Low: 68 °F

  • Wednesday

    Wednesday: A slight chance of showers.  Partly sunny, with a high near 85.

    Slight Chance
    Showers

    High: 85 °F

Detailed Forecast

Tonight
Showers and thunderstorms, mainly before 10pm. Some storms could be severe, with heavy rain. Low around 76. South southeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 91. Heat index values as high as 103. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Mostly cloudy, with a low around 69. Northwest wind 5 to 10 mph.
Monday
Sunny, with a high near 86. Northwest wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 65. Northwest wind around 5 mph.
Tuesday
Sunny, with a high near 86.
Tuesday Night
Partly cloudy, with a low around 68.
Wednesday
A slight chance of showers. Partly sunny, with a high near 85.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 82.
Thursday Night
A slight chance of showers. Mostly cloudy, with a low around 65.
Friday
A chance of showers. Partly sunny, with a high near 81.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 81.
Click Map For Forecast
Point Forecast:
Crystal Lake IL
 42.23°N 88.33°W
7:17 pm CDT Jul 23, 2016
8pm CDT Jul 23, 2016-6pm CDT Jul 30, 2016
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database