Heavy Rain and Flash Flooding in the West; Heat Expands in the Central U.S.

Monsoonal moisture will produce showers and thunderstorms with heavy rain over parts of the Southwest, Great Basin, and Central Rockies through Monday. Flash flooding is possible, especially in and around burn scars and in areas of steep terrain. Heat will persist across the Central U.S. early this week, spreading into the Ohio Valley and Mid-Atlantic later this 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.

Thunderstorm in Vicinity

74°F

23°C

Humidity	88%
Wind Speed	S 13 mph
Barometer	29.97 in (1013.8 mb)
Dewpoint	70°F (21°C)
Visibility	10.00 mi
Last update	30 Aug 3:51 pm CDT

More Information:

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

Extended Forecast for

Mc Cullom Lake IL

This Afternoon
High: 82 °F
Showers
Tonight
Low: 71 °F
Showers
Likely then
Slight Chance
T-storms
Monday
High: 88 °F
Chance
Showers then
Slight Chance
T-storms
Monday Night
Low: 73 °F
Mostly Cloudy
then Slight
Chance
T-storms
Tuesday
High: 90 °F
Slight Chance
T-storms
Tuesday Night
Low: 72 °F
Partly Cloudy
Wednesday
High: 90 °F
Mostly Sunny
Wednesday Night
Low: 70 °F
Partly Cloudy
then Chance
T-storms
Thursday
High: 86 °F
Chance
T-storms

Detailed Forecast

This Afternoon

Showers and possibly a thunderstorm. High near 82. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight

Showers and thunderstorms likely before 9pm, then a slight chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 71. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Monday

A chance of showers and thunderstorms before noon, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 88. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

Monday Night

A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 73. Southwest wind 5 to 10 mph.

Tuesday

A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 90. Calm wind becoming southwest around 5 mph in the morning. Winds could gust as high as 15 mph.

Tuesday Night

Partly cloudy, with a low around 72.

Wednesday

Mostly sunny, with a high near 90.

Wednesday Night

A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70.

Thursday

A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 86.

Thursday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 68.

Friday

Mostly sunny, with a high near 85.