Dangerous Heat Wave To Persist From The Midwest to the Ohio Valley

A very hot and humid air mass will persist today across much of the Midwest and Ohio Valley. Afternoon high temperatures will exceed 95 degrees in many locations with heat index values between 100 and 110. Hot temperatures will expand into the eastern U.S. on Monday with several of the major I-95 cities reaching 90 degrees or higher. Take it slow, drink plenty of fluids and limit outdoor exposure. Read More >

Hazardous Weather Conditions

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Current conditions at

Chicago / Wheeling, Pal-Waukee Airport (KPWK)

Lat: 42.12°NLon: 87.9°WElev: 646ft.

A Few Clouds

93°F

34°C

Humidity	52%
Wind Speed	S 14 G 22 mph
Barometer	29.96 in (1014.0 mb)
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Heat Index	102°F (39°C)
Last update	17 Jun 3:52 pm CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Mobile Weather Hourly Weather Forecast

Extended Forecast for

Crystal Lake IL

Heat Advisory until June 18, 07:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory until June 18, 07:00pm

NOW until
7:00pm Mon

Heat Advisory
This
Afternoon

Isolated
T-storms
High: 91 °F
Tonight

Partly Cloudy
Low: 76 °F
Monday

Slight Chance
T-storms then
T-storms
Likely
High: 91 °F
Monday
Night

T-storms
Likely
Low: 64 °F
Tuesday

Chance
T-storms
High: 76 °F
Tuesday
Night

Chance
T-storms
Low: 61 °F
Wednesday

Chance
T-storms
High: 75 °F
Wednesday
Night

Mostly Cloudy
Low: 59 °F

Detailed Forecast

This Afternoon

Isolated showers and thunderstorms. Mostly sunny, with a high near 91. Heat index values as high as 103. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

Tonight

Partly cloudy, with a low around 76. South southwest wind around 10 mph, with gusts as high as 20 mph.

Monday

Showers and thunderstorms likely, mainly after 4pm. Mostly sunny, with a high near 91. Heat index values as high as 100. West southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Monday Night

Showers and thunderstorms likely. Mostly cloudy, with a low around 64. Northeast wind 5 to 10 mph. Chance of precipitation is 60%.

Tuesday

A 50 percent chance of showers and thunderstorms. Cloudy, with a high near 76. East northeast wind 5 to 10 mph.

Tuesday Night

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61.

Wednesday

A 30 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 75.

Wednesday Night

Mostly cloudy, with a low around 59.

Thursday

A chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 76.