Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across much of northeast Texas into the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Saturday could bring areas of flooding across parts of the central Plains into the upper Midwest/Great Lakes, and Four Corners states. Read More >

Hazardous Weather Conditions

Heat Advisory until September 19, 08:00 PM CDT

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fog/Mist

71°F

22°C

Humidity	96%
Wind Speed	Calm
Barometer	30.21 in
Dewpoint	70°F (21°C)
Visibility	5.00 mi
Last update	17 Sep 3:15 am CDT

More Information:

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

Extended Forecast for

West Alton MO

Heat Advisory September 17, 03:38am until September 19, 08:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory September 17, 03:38am until September 19, 08:00pm
NOW until 8:00pm Sat
Heat Advisory
Overnight
Low: 74 °F
Mostly Clear
Thursday
High: 99 °F
Sunny then
Chance
T-storms
Thursday Night
Low: 73 °F
Mostly Clear
Friday
High: 96 °F
Sunny then
Slight Chance
T-storms
Friday Night
Low: 74 °F
Mostly Clear
Saturday
High: 98 °F
Hot
Saturday Night
Low: 73 °F
Partly Cloudy
then Slight
Chance
T-storms
Sunday
High: 93 °F
Slight Chance
Showers then
Slight Chance
T-storms

Detailed Forecast

Overnight

Mostly clear, with a low around 74. Light south wind.

Thursday

A 30 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Sunny and hot, with a high near 99. Heat index values as high as 106. Light and variable wind becoming west 5 to 9 mph in the morning.

Thursday Night

Mostly clear, with a low around 73. Southwest wind around 5 mph becoming calm in the evening.

Friday

A slight chance of showers and thunderstorms between 1pm and 3pm. Sunny, with a high near 96. Heat index values as high as 102. Light and variable wind becoming east around 6 mph. Chance of precipitation is 20%.

Friday Night

Mostly clear, with a low around 74. Southeast wind 3 to 6 mph.

Saturday

Mostly sunny and hot, with a high near 98.

Saturday Night

A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73.

Sunday

A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 93. Chance of precipitation is 20%.

Sunday Night

A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 67.

Monday

A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 86. Chance of precipitation is 50%.