Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Hazardous Weather Conditions

Heat Advisory until September 19, 08:00 PM CDT

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

83°F

28°C

Humidity	74%
Wind Speed	S 3 mph
Barometer	30.01 in (1015.8 mb)
Dewpoint	74°F (23°C)
Visibility	10.00 mi
Heat Index	90°F (32°C)
Last update	18 Sep 7:53 pm CDT

More Information:

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

Extended Forecast for

Lakeshire MO

Heat Advisory September 18, 08:46pm until September 19, 08:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory September 18, 08:46pm until September 19, 08:00pm
NOW until 8:00pm Sat
Heat Advisory
Tonight
Low: 74 °F
Partly Cloudy
Saturday
High: 99 °F
Hot
Saturday Night
Low: 75 °F
Gradual
Clearing
Sunday
High: 95 °F
Slight Chance
Showers then
Slight Chance
T-storms
Sunday Night
Low: 69 °F
Chance
T-storms then
Showers
Likely
Monday
High: 81 °F
Showers
Likely
Monday Night
Low: 62 °F
Slight Chance
T-storms
Tuesday
High: 72 °F
Mostly Cloudy

Detailed Forecast

Tonight

Partly cloudy, with a low around 74. Southeast wind 3 to 5 mph.

Saturday

Increasing clouds and hot, with a high near 99. Heat index values as high as 103. West wind 3 to 7 mph.

Saturday Night

Cloudy during the early evening, then gradual clearing, with a low around 75. Calm wind becoming southwest around 5 mph after midnight.

Sunday

A slight chance of showers, with thunderstorms also possible after 4pm. Mostly sunny, with a high near 95. West wind 3 to 6 mph. Chance of precipitation is 20%.

Sunday Night

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 69. North wind 5 to 7 mph. Chance of precipitation is 60%.

Monday

Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 81. Chance of precipitation is 70%.

Monday Night

A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Chance of precipitation is 20%.

Tuesday

Mostly cloudy, with a high near 72.

Tuesday Night

Mostly cloudy, with a low around 56.

Wednesday

Mostly sunny, with a high near 75.

Wednesday Night

Partly cloudy, with a low around 57.