Active Weather Pattern Expected From the Midwest to the Southern Plains; Dangerous Heat Likely in Southern Texas

A strong storm system will bring numerous to widespread severe thunderstorms across portions of the Midwest and Upper Great Lakes Tuesday. Tornadoes (a few strong), damaging winds and large hail are expected. Record high temperatures will be possible over southern Texas the next several days. This may lead to dangerous heat concerns especially for areas already without power. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Thunderstorm

72°F

22°C

Humidity	93%
Wind Speed	Calm
Barometer	29.75 in
Dewpoint	70°F (21°C)
Visibility	10.00 mi
Last update	22 May 12:15 am CDT

More Information:

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

Extended Forecast for

5 Miles SSE Donnellson IL

Overnight
Low: 62 °F
Chance
T-storms
Wednesday
High: 77 °F
Mostly Sunny
then Chance
Showers
Wednesday Night
Low: 60 °F
Chance
T-storms
Thursday
High: 79 °F
Chance
T-storms
Thursday Night
Low: 65 °F
Slight Chance
T-storms then
Chance
T-storms
Friday
High: 81 °F
Showers
Friday Night
Low: 58 °F
Chance
T-storms
Saturday
High: 77 °F
Sunny then
Slight Chance
Showers
Saturday Night
Low: 60 °F
Slight Chance
Showers then
Chance
T-storms

Detailed Forecast

Overnight

A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 62. Southwest wind 8 to 13 mph, with gusts as high as 24 mph.

Wednesday

A slight chance of showers and thunderstorms before 2pm, then a chance of showers between 2pm and 4pm, then a chance of showers and thunderstorms after 4pm. Increasing clouds, with a high near 77. West wind 7 to 10 mph. Chance of precipitation is 30%.

Wednesday Night

A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 60. West wind around 6 mph becoming calm in the evening.

Thursday

A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 79. Light and variable wind becoming east around 6 mph in the morning.

Thursday Night

A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 65. Southeast wind around 6 mph.

Friday

Showers and possibly a thunderstorm. High near 81. Chance of precipitation is 80%.

Friday Night

A 40 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 58.

Saturday

A 20 percent chance of showers after 1pm. Sunny, with a high near 77.

Saturday Night

A slight chance of showers, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 60. Chance of precipitation is 50%.

Sunday

Showers likely and possibly a thunderstorm. Partly sunny, with a high near 77. Chance of precipitation is 60%.

Sunday Night

Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.

Memorial Day

A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 76.

Monday Night

A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 58.

Tuesday

A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 75.