Severe Thunderstorms and Heavy Rainfall for the Southwest; Heat Spreads Across the Center of the Nation

Moisture will continue to move into areas of the West. This will increase showers and thunderstorms coverage and intensity, with the risk of flash flooding and damaging wind gusts. Meanwhile, heat across the Southwest will expand into the center of the nation this weekend into early next week. Trends favor this heat will spread across the Ohio Valley, mid-Atlantic next week. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

67°F

19°C

Humidity	81%
Wind Speed	SW 8 mph
Barometer	30.14 in (1019.7 mb)
Dewpoint	61°F (16°C)
Visibility	7.00 mi
Last update	29 Aug 7:51 am CDT

More Information:

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

Extended Forecast for

McHenry IL

Today
High: 79 °F
Partly Sunny
then Chance
Showers
Tonight
Low: 67 °F
Chance
Showers
Sunday
High: 86 °F
Chance
Showers then
Partly Sunny
Sunday Night
Low: 70 °F
Mostly Cloudy
then Slight
Chance
Showers
Monday
High: 88 °F
Partly Sunny
Monday Night
Low: 72 °F
Mostly Cloudy
Tuesday
High: 89 °F
Slight Chance
Showers
Tuesday Night
Low: 71 °F
Partly Cloudy
Wednesday
High: 89 °F
Mostly Sunny

Detailed Forecast

Today

A 30 percent chance of showers, mainly after 5pm. Partly sunny, with a high near 79. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

Tonight

A slight chance of rain before 2am, then a slight chance of showers between 2am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 67. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

Sunday

A chance of showers and thunderstorms before 11am, then a slight chance of showers between 11am and noon. Partly sunny, with a high near 86. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

Sunday Night

A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 70. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.

Monday

Partly sunny, with a high near 88. South southwest wind around 10 mph, with gusts as high as 20 mph.

Monday Night

Mostly cloudy, with a low around 72.

Tuesday

A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 89.

Tuesday Night

Partly cloudy, with a low around 71.

Wednesday

Mostly sunny, with a high near 89.