Severe Weather and Heavy Rainfall from the Midwest to the Ohio Valley; Mid-Summer Heat Continues

Severe thunderstorm and heavy rainfall threats will persist from the Midwest to Lower Great Lakes through Monday, shifting into the Ohio Valley and Central Appalachians Monday evening into Tuesday. Mid-summer heat will continue across much of the CONUS this week, with record highs possible well into the 100s across the south-central High Plains. Read More >

Hazardous Weather Conditions

Extreme Heat Warning until August 12, 08:00 PM CDT

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

A Few Clouds

82°F

28°C

Humidity	72%
Wind Speed	S 10 mph
Barometer	29.96 in (1013.0 mb)
Dewpoint	72°F (22°C)
Visibility	10.00 mi
Heat Index	87°F (31°C)
Last update	10 Aug 3:51 am CDT

More Information:

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

Extended Forecast for

Saint John MO

Extreme Heat Warning August 10, 04:21am until August 12, 08:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning August 10, 04:21am until August 12, 08:00pm
NOW until 8:00pm Wed
Extreme Heat Warning
Today
High: 97 °F
Slight Chance
T-storms then
Partly Sunny
Tonight
Low: 80 °F
Partly Cloudy
Tuesday
High: 98 °F
Hot
Tuesday Night
Low: 80 °F
Partly Cloudy
then Slight
Chance
Showers
Wednesday
High: 97 °F
Slight Chance
Showers then
Slight Chance
T-storms
Wednesday Night
Low: 77 °F
Chance
T-storms
Thursday
High: 92 °F
Chance
T-storms
Thursday Night
Low: 74 °F
Chance
T-storms

Detailed Forecast

Today

A slight chance of showers and thunderstorms between 7am and 9am. Mostly cloudy through mid morning, then becoming sunny and hot, with a high near 97. Heat index values as high as 105. Southwest wind 7 to 9 mph. Chance of precipitation is 20%.

Tonight

Partly cloudy, with a low around 80. South wind 6 to 8 mph.

Tuesday

Sunny and hot, with a high near 98. Heat index values as high as 109. Southwest wind 7 to 9 mph.

Tuesday Night

A 20 percent chance of showers after 1am. Partly cloudy, with a low around 80. Southwest wind 5 to 7 mph.

Wednesday

A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny and hot, with a high near 97. Southwest wind 7 to 9 mph. Chance of precipitation is 20%.

Wednesday Night

A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 77.

Thursday

A 30 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 92.

Thursday Night

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 74.

Friday

A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.

Friday Night

A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.

Saturday

A 20 percent chance of showers. Mostly sunny, with a high near 92.