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 Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

77°F

25°C

Humidity	79%
Wind Speed	E 6 mph
Barometer	30.02 in
Dewpoint	70°F (21°C)
Visibility	10.00 mi
Heat Index	79°F (26°C)
Last update	5 Aug 7:45 pm CDT

More Information:

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

Extended Forecast for

2 Miles WNW Alton IL

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

Click here for hazard details and duration

Flood Watch

Tonight
Low: 72 °F
Slight Chance
T-storms then
Heavy Rain
Thursday
High: 83 °F
Heavy Rain
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: 72 °F
Mostly Clear
Sunday
High: 92 °F
Mostly Sunny
Sunday Night
Low: 75 °F
Mostly Clear

Detailed Forecast

Tonight

Showers and thunderstorms, mainly after 4am. Some of the storms could produce heavy rainfall. Low around 72. East wind around 5 mph becoming light and variable. Chance of precipitation is 80%.

Thursday

Showers and thunderstorms, mainly before 1pm. Some of the storms could produce heavy rainfall. High near 83. Southwest wind 3 to 6 mph. Chance of precipitation is 80%.

Thursday Night

A 50 percent chance of showers and thunderstorms, mainly after 10pm. Mostly cloudy, with a low around 71. Calm wind becoming south around 5 mph after midnight.

Friday

A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 87. South wind 5 to 7 mph becoming southwest in the afternoon.

Friday Night

A 40 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 72. Southwest wind 3 to 6 mph.

Saturday

Mostly sunny, with a high near 90.

Saturday Night

Mostly clear, with a low around 72.

Sunday

Mostly sunny, with a high near 92.

Sunday Night

Mostly clear, with a low around 75.