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. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Thunderstorm Light Rain

73°F

23°C

Humidity	84%
Wind Speed	W 13 G 18 mph
Barometer	29.76 in (1007.1 mb)
Dewpoint	68°F (20°C)
Visibility	10.00 mi
Last update	21 May 11:54 pm CDT

More Information:

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

Extended Forecast for

2 Miles SSW Portage Des Sioux MO

Overnight
Low: 61 °F
Chance
T-storms
Wednesday
High: 78 °F
Sunny then
Chance
Showers
Wednesday Night
Low: 61 °F
Chance
T-storms
Thursday
High: 82 °F
Chance
T-storms
Thursday Night
Low: 67 °F
Chance
T-storms then
Showers
Likely
Friday
High: 85 °F
Showers
Friday Night
Low: 58 °F
Chance
T-storms
Saturday
High: 79 °F
Sunny
Saturday Night
Low: 61 °F
Chance
T-storms

Detailed Forecast

Overnight

A 30 percent chance of showers and thunderstorms, mainly before 1am. Cloudy early, then gradual clearing, with a low around 61. West wind 7 to 11 mph, with gusts as high as 22 mph.

Wednesday

A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Increasing clouds, with a high near 78. West wind 6 to 9 mph. Chance of precipitation is 40%.

Wednesday Night

A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61. Northwest wind around 6 mph becoming calm in the evening.

Thursday

A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 82. Calm wind becoming southeast 5 to 8 mph in the morning.

Thursday Night

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 67. Southeast wind around 7 mph. Chance of precipitation is 60%.

Friday

Showers and possibly a thunderstorm. High near 85. Chance of precipitation is 80%.

Friday Night

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

Saturday

Sunny, with a high near 79.

Saturday Night

A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61.

Sunday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 81. Chance of precipitation is 60%.

Sunday Night

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

Memorial Day

A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 79.

Monday Night

A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 59.

Tuesday

A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 77.