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 Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

A Few Clouds and Breezy

91°F

33°C

Humidity	41%
Wind Speed	S 24 G 35 mph
Barometer	29.69 in (1004.1 mb)
Dewpoint	64°F (18°C)
Visibility	10.00 mi
Heat Index	93°F (34°C)
Last update	21 May 2:51 pm CDT

More Information:

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

Extended Forecast for

Saint Louis MO

Tonight
Low: 62 °F
Heavy Rain
and Breezy
then Chance
T-storms
Wednesday
High: 79 °F
Mostly Sunny
then Chance
T-storms
Wednesday Night
Low: 63 °F
Chance
T-storms
Thursday
High: 82 °F
Chance
T-storms
Thursday Night
Low: 68 °F
Chance
T-storms then
Showers
Likely
Friday
High: 84 °F
Showers
Friday Night
Low: 60 °F
Chance
T-storms
Saturday
High: 79 °F
Sunny
Saturday Night
Low: 62 °F
Chance
T-storms then
Showers
Likely

Detailed Forecast

Tonight

Showers and thunderstorms, mainly before 1am. Some of the storms could produce heavy rainfall. Low around 62. Breezy, with a south wind 15 to 20 mph becoming west 7 to 12 mph after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 90%.

Wednesday

A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 79. West wind 6 to 9 mph.

Wednesday Night

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Northwest wind around 5 mph becoming calm in the evening.

Thursday

A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 82. Calm wind becoming southeast around 6 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 68. Southeast wind around 6 mph. Chance of precipitation is 60%.

Friday

Showers and possibly a thunderstorm. High near 84. Chance of precipitation is 80%.

Friday Night

A 40 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 60.

Saturday

Sunny, with a high near 79.

Saturday Night

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 62. Chance of precipitation is 60%.

Sunday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 82. Chance of precipitation is 60%.

Sunday Night

Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 62. 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 60.

Tuesday

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