Showers and Storms in the East; Dangerously Hot and Dry in the West

A frontal boundary will bring scattered showers and storms to portions of the Central and Eastern U.S. through the end of the week. Meanwhile, dangerous heat will intensify across the Intermountain West and expand into the Central U.S. by early next week. Elevated wildfire conditions will develop across portions of the Northern/Central Plains and air quality issues will persist in the Northwest. Read More >

Hazardous Weather Conditions

Flood Watch in effect from August 5, 10:00 PM CDT until August 6, 10:00 AM CDT

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

85°F

29°C

Humidity	59%
Wind Speed	SE 5 mph
Barometer	30.01 in (1016.0 mb)
Dewpoint	69°F (21°C)
Visibility	10.00 mi
Heat Index	89°F (32°C)
Last update	5 Aug 4:53 pm CDT

More Information:

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

Extended Forecast for

3 Miles ESE Collinsville IL

Flood Watch August 5, 10:00pm until August 6, 10:00am

Click here for hazard details and duration

Flood Watch

This Afternoon
High: 90 °F
Slight Chance
T-storms
Tonight
Low: 72 °F
Slight Chance
T-storms then
T-storms
Likely
Thursday
High: 84 °F
T-storms
Likely then
Chance
T-storms
Thursday Night
Low: 71 °F
Chance
T-storms
Friday
High: 87 °F
Chance
T-storms
Friday Night
Low: 72 °F
Chance
T-storms
Saturday
High: 90 °F
Mostly Sunny
Saturday Night
Low: 73 °F
Mostly Clear
Sunday
High: 92 °F
Mostly Sunny

Detailed Forecast

This Afternoon

A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 90. South wind around 7 mph.

Tonight

Showers and thunderstorms likely, mainly after 4am. Mostly cloudy, with a low around 72. South wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 60%.

Thursday

Showers and thunderstorms likely, mainly before 1pm. Mostly cloudy, with a high near 84. Light and variable wind becoming south around 6 mph in the morning. Chance of precipitation is 70%.

Thursday Night

A 50 percent chance of showers and thunderstorms, mainly after 10pm. Mostly cloudy, with a low around 71. East wind 3 to 5 mph.

Friday

A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 87. Southwest wind 5 to 7 mph.

Friday Night

A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.

Saturday

Mostly sunny, with a high near 90.

Saturday Night

Mostly clear, with a low around 73.

Sunday

Mostly sunny, with a high near 92.