Heavy Rain From the Central Plains to the Mid-Atlantic; Heat Wave Begins This Weekend

Strong to severe thunderstorms and heavy rain will impact portions of the central Plains into the Upper Midwest and the Mid-Atlantic through the weekend. A stretch of unusually hot and humid weather is expected across portions of the central U.S. and the Southeast beginning this weekend and continuing through next week. The heat may reach dangerous levels, particularly mid to late next week. Read More >

Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Mostly Cloudy

86°F

30°C

Humidity	79%
Wind Speed	Calm
Barometer	30.08 in
Dewpoint	79°F (26°C)
Visibility	10.00 mi
Heat Index	99°F (37°C)
Last update	18 Jul 12:45 pm CDT

More Information:

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

Extended Forecast for

Vienna IL

Heat Advisory until July 18, 07:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory until July 18, 07:00pm
NOW until 7:00pm Fri
Heat Advisory
This Afternoon
High: 90 °F
Chance
T-storms
Tonight
Low: 75 °F
Chance
T-storms
Saturday
High: 90 °F
Chance
T-storms
Saturday Night
Low: 76 °F
Slight Chance
T-storms
Sunday
High: 93 °F
Chance
T-storms
Sunday Night
Low: 76 °F
Slight Chance
T-storms
Monday
High: 94 °F
Chance
T-storms
Monday Night
Low: 77 °F
Mostly Clear

Detailed Forecast

This Afternoon

A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90. Light and variable wind.

Tonight

A chance of showers and thunderstorms before 3am, then a slight chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 75. South southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 50%.

Saturday

A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 90. Southwest wind 3 to 7 mph.

Saturday Night

A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 76. Light south southwest wind.

Sunday

A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 93. Southwest wind 3 to 5 mph.

Sunday Night

A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76. Calm wind.

Monday

A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 94. Calm wind becoming southwest around 5 mph in the afternoon.

Monday Night

Mostly clear, with a low around 77. Light south wind.

Tuesday

A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 94. Calm wind becoming south southwest around 6 mph in the morning.

Tuesday Night

Mostly clear, with a low around 77. Light south wind.

Wednesday

Sunny, with a high near 95. Calm wind becoming south southwest around 6 mph in the morning.

Wednesday Night

Mostly clear, with a low around 77. Calm wind.

Thursday

Mostly sunny, with a high near 96. Calm wind becoming south southwest around 6 mph in the afternoon.