Strong to Severe Thunderstorms in the East; Heat in the Central and Western U.S.

Strong to potentially severe thunderstorms with damaging wind gusts are forecast Thursday from parts of New England into the Mid Atlantic and Carolinas. Significant heat will expand across the West and Central Plains through Friday, potentially breaking daily high temperature records. Dangerous heat will then build into the Eastern U.S. this weekend through much of next week. Read More >

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

69°F

21°C

Humidity	76%
Wind Speed	SW 8 mph
Barometer	29.95 in (1013.2 mb)
Dewpoint	61°F (16°C)
Visibility	10.00 mi
Last update	20 Jun 5:51 am CDT

More Information:

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

Extended Forecast for

McHenry IL

Heat Advisory June 21, 10:00am until June 24, 12:00am

Click here for hazard details and duration

Heat Advisory

Today
High: 84 °F
Showers
Likely
Tonight
Low: 73 °F
Partly Cloudy
Saturday
High: 94 °F
Sunny and
Breezy
Saturday Night
Low: 77 °F
Mostly Clear
and Breezy
then Clear
Sunday
High: 96 °F
Hot
Sunday Night
Low: 76 °F
Clear
Monday
High: 96 °F
Hot
Monday Night
Low: 73 °F
Chance
T-storms
Tuesday
High: 89 °F
Chance
T-storms

Detailed Forecast

Today

Showers and thunderstorms likely before 1pm, then a slight chance of showers between 1pm and 3pm. Mostly cloudy, then gradually becoming sunny, with a high near 84. South southwest wind 5 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight

Partly cloudy, with a low around 73. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

Saturday

Sunny, with a high near 94. Heat index values as high as 107. Breezy, with a south southwest wind 15 to 25 mph, with gusts as high as 35 mph.

Saturday Night

Mostly clear, with a low around 77. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 30 mph.

Sunday

Sunny and hot, with a high near 96. Southwest wind around 15 mph, with gusts as high as 30 mph.

Sunday Night

Clear, with a low around 76.

Monday

Sunny and hot, with a high near 96.