Three Weather Areas of Concern Today

Potential Tropical Cyclone Three will gradually approach the northern Gulf Coast with heavy rain and potential flooding. Meanwhile, a sharp cold front will produce severe thunderstorms with significant winds, hail, tornadoes and possible flooding across the Ohio Valley. Finally, a large dome of high pressure will continue the major heat wave over the West, extending into the central Plains. Read More >

Hazardous Weather Conditions

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Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Mostly Cloudy

94°F

34°C

Humidity	48%
Wind Speed	SW 13 mph
Barometer	29.86 in (1009.5 mb)
Dewpoint	71°F (22°C)
Visibility	10.00 mi
Heat Index	102°F (39°C)
Last update	18 Jun 7:51 pm CDT

More Information:

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

Extended Forecast for

Florissant MO

Heat Advisory until June 20, 07:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory until June 20, 07:00pm

NOW until
7:00pm Sun

Heat Advisory
Tonight

Partly Cloudy
then Slight
Chance
T-storms
Low: 78 °F
Saturday

Chance
T-storms
High: 98 °F
Saturday
Night

Heavy Rain
then Partly
Cloudy
Low: 75 °F
Sunday

Hot
High: 98 °F
Sunday
Night

Chance
T-storms
Low: 74 °F
Monday

Chance
T-storms
High: 81 °F
Monday
Night

Chance
T-storms then
Mostly Clear
Low: 58 °F
Tuesday

Sunny
High: 79 °F

Detailed Forecast

Tonight

A 20 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 78. Southwest wind 7 to 9 mph.

Saturday

A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny and hot, with a high near 98. Heat index values as high as 103. Southwest wind 7 to 10 mph.

Saturday Night

A 40 percent chance of showers and thunderstorms before 11pm. Some of the storms could produce heavy rainfall. Partly cloudy, with a low around 75. South wind 3 to 7 mph.

Sunday

Mostly sunny and hot, with a high near 98. Southwest wind 5 to 11 mph, with gusts as high as 22 mph.

Sunday Night

A 40 percent chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 74. Southwest wind around 10 mph, with gusts as high as 20 mph.

Monday

A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.

Monday Night

A 40 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 58.

Tuesday

Sunny, with a high near 79.

Tuesday Night

Mostly clear, with a low around 61.

Wednesday

Sunny, with a high near 86.

Wednesday Night

A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66.