Severe Weather and Heavy Rainfall from the High Plains to the Ohio Valley; Heat Continuing in the Central Plains and Southeast

A stationary front will be the focus for daily showers and thunderstorms capable of widely scattered flash flooding and severe weather from the High Plains to the Ohio Valley. Monsoonal thunderstorms could cause local flash flooding across the Southwest and the Great Basin. Dangerous heat continues across the Central Plains and Southeast. Many areas will see their hottest temperatures of the year. Read More >

Hazardous Weather Conditions

Heat Advisory until August 13, 08:00 PM CDT

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

86°F

30°C

Humidity	66%
Wind Speed	W 12 mph
Barometer	29.86 in
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Heat Index	93°F (34°C)
Last update	12 Aug 9:50 am CDT

More Information:

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

Extended Forecast for

Gillespie IL

Heat Advisory August 12, 10:40am until August 13, 08:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory August 12, 10:40am until August 13, 08:00pm
NOW until 8:00pm Thu
Heat Advisory
Today
High: 89 °F
Sunny then
Scattered
T-storms
Tonight
Low: 72 °F
Isolated
T-storms then
Scattered
Showers
Thursday
High: 89 °F
Scattered
T-storms
Thursday Night
Low: 73 °F
Partly Cloudy
Friday
High: 94 °F
Mostly Sunny
Friday Night
Low: 74 °F
Mostly Clear
Saturday
High: 96 °F
Sunny
Saturday Night
Low: 75 °F
Mostly Clear

Detailed Forecast

Today

Scattered showers and thunderstorms, mainly after 3pm. Sunny early, then becoming mostly cloudy, with a high near 89. Southwest wind around 7 mph. Chance of precipitation is 30%.

Tonight

Scattered showers and thunderstorms, mainly after 4am. Partly cloudy, with a low around 72. East wind around 5 mph becoming light and variable after midnight. Chance of precipitation is 30%.

Thursday

Scattered showers and thunderstorms before 1pm, then isolated showers and thunderstorms after 2pm. Partly sunny, with a high near 89. South wind 5 to 7 mph. Chance of precipitation is 30%.

Thursday Night

Partly cloudy, with a low around 73. South wind around 6 mph becoming light and variable after midnight.

Friday

Mostly sunny, with a high near 94. Calm wind becoming east around 5 mph in the morning.

Friday Night

Mostly clear, with a low around 74.

Saturday

Sunny, with a high near 96.

Saturday Night

Mostly clear, with a low around 75.

Sunday

Sunny, with a high near 94.