Thunderstorms and Heavy Rains Across Portions of the Central and Eastern US; Heat Expands to Portions of the East and West

Widespread showers and thunderstorms, some severe, may produce heavy downpours and flash flooding across much of the eastern and central U.S. Dangerous heat will continue in the Pacific Northwest and expand across portions of the East. Deep tropical moisture and associated thunderstorms will bring heavy rainfall and localized flash flooding across portions of Florida into the central Gulf Coast. Read More >

Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

87°F

31°C

Humidity	72%
Wind Speed	SW 14 mph
Barometer	29.91 in (1012.2 mb)
Dewpoint	77°F (25°C)
Visibility	10.00 mi
Heat Index	99°F (37°C)
Last update	16 Jul 5:52 pm CDT

More Information:

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

Extended Forecast for

3 Miles SW Vergennes IL

Heat Advisory July 16, 06:50pm until July 16, 07:00pm

Click here for hazard details and duration

...

Heat Advisory July 16, 06:50pm until July 16, 07:00pm
NOW until 7:00pm Wed
Heat Advisory
Tonight
Low: 74 °F
Mostly Clear
Thursday
High: 91 °F
Slight Chance
T-storms then
Chance
T-storms
Thursday Night
Low: 72 °F
Chance
T-storms
Friday
High: 88 °F
T-storms
Likely
Friday Night
Low: 74 °F
T-storms
Likely then
Chance
Showers
Saturday
High: 91 °F
Chance
Showers then
Chance
T-storms
Saturday Night
Low: 76 °F
Slight Chance
T-storms
Sunday
High: 92 °F
Mostly Sunny
then Chance
T-storms

Detailed Forecast

Tonight

Mostly clear, with a low around 74. South southwest wind around 6 mph.

Thursday

A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 91. Heat index values as high as 106. Southwest wind around 6 mph becoming north northwest in the afternoon.

Thursday Night

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Light and variable wind.

Friday

A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms likely after 4pm. Partly sunny, with a high near 88. Light and variable wind becoming south southwest around 5 mph in the afternoon. Chance of precipitation is 60%.

Friday Night

Showers and thunderstorms likely before 4am, then a slight chance of showers. Mostly cloudy, with a low around 74. South southeast wind 3 to 5 mph. Chance of precipitation is 60%.

Saturday

A chance of showers, with thunderstorms also possible after 10am. Mostly sunny, with a high near 91. South southwest wind 5 to 8 mph. Chance of precipitation is 30%.

Saturday Night

A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 76. South southwest wind around 6 mph.

Sunday

A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92. Southwest wind around 6 mph.

Sunday Night

A chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 75. South wind around 5 mph.

Monday

A chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 94. South southwest wind 5 to 8 mph.

Monday Night

Mostly clear, with a low around 77. South wind around 7 mph.

Tuesday

Sunny, with a high near 95. South southwest wind around 7 mph.