Lala Approaching Hawaii; Flash Flooding Risks; Excessive Heat

Lala, may become a hurricane, is expected to impact Hawaii this weekend. Heavy rainfall, strong winds, dangerous surf and localized flooding are expected. Heavy rainfall and flash flooding concerns from the mid-Mississippi Valley, Ohio Valley into the central Appalachians continues, with the threat shifting toward the mid-Atlantic later this weekend. Record heat continues for areas of the South. Read More >

Hazardous Weather Conditions

Extreme Heat Warning until August 16, 09:00 PM CDT

Current conditions at

St. Louis, Spirit Of St. Louis Airport (KSUS)

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Mostly Cloudy

78°F

26°C

Humidity	90%
Wind Speed	Calm
Barometer	30.02 in (1015.5 mb)
Dewpoint	75°F (24°C)
Visibility	10.00 mi
Heat Index	80°F (27°C)
Last update	16 Aug 4:54 am CDT

More Information:

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

Extended Forecast for

Chesterfield MO

Extreme Heat Warning August 16, 05:38am until August 16, 09:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning August 16, 05:38am until August 16, 09:00pm
NOW until 9:00pm Sun
Extreme Heat Warning
Overnight
Low: 77 °F
Slight Chance
T-storms
Sunday
High: 93 °F
Chance
T-storms
Sunday Night
Low: 72 °F
Chance
T-storms
Monday
High: 86 °F
Sunny
Monday Night
Low: 67 °F
Mostly Clear
Tuesday
High: 90 °F
Sunny
Tuesday Night
Low: 73 °F
Partly Cloudy
then Chance
T-storms
Wednesday
High: 88 °F
Chance
Showers

Detailed Forecast

Overnight

A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 77. West wind around 5 mph.

Sunday

A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 93. Heat index values as high as 107. West wind 5 to 7 mph. Chance of precipitation is 30%.

Sunday Night

A 30 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 72. North wind 5 to 7 mph.

Monday

Sunny, with a high near 86. North wind 6 to 8 mph.

Monday Night

Mostly clear, with a low around 67. Light north wind.

Tuesday

Sunny, with a high near 90.

Tuesday Night

A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73.

Wednesday

A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 88.