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 Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

A Few Clouds

85°F

29°C

Humidity	68%
Wind Speed	S 10 mph
Barometer	30.01 in (1014.6 mb)
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Heat Index	92°F (33°C)
Last update	15 Aug 1:51 am CDT

More Information:

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

Extended Forecast for

Clayton MO

Extreme Heat Warning August 15, 02:50am until August 16, 09:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning August 15, 02:50am until August 16, 09:00pm
NOW until 9:00pm Sun
Extreme Heat Warning
Overnight
Low: 79 °F
Mostly Cloudy
Saturday
High: 95 °F
Slight Chance
T-storms then
Mostly Sunny
Saturday Night
Low: 78 °F
Mostly Clear
Sunday
High: 95 °F
Decreasing
Clouds
Sunday Night
Low: 73 °F
Chance
T-storms then
Chance
Showers
Monday
High: 86 °F
Mostly Sunny
Monday Night
Low: 70 °F
Partly Cloudy
Tuesday
High: 91 °F
Sunny

Detailed Forecast

Overnight

Mostly cloudy, with a low around 79. South wind around 5 mph.

Saturday

A slight chance of showers and thunderstorms between 8am and 9am. Mostly cloudy, then gradually becoming sunny, with a high near 95. Heat index values as high as 110. West wind 5 to 7 mph becoming northeast in the morning. Chance of precipitation is 20%.

Saturday Night

Mostly clear, with a low around 78. Calm wind becoming southwest around 5 mph after midnight.

Sunday

Mostly cloudy, then gradually becoming sunny, with a high near 95. Heat index values as high as 109. Northwest wind 6 to 8 mph.

Sunday Night

A chance of showers and thunderstorms. Partly cloudy, with a low around 73. North wind 5 to 8 mph. Chance of precipitation is 30%.

Monday

Mostly sunny, with a high near 86.

Monday Night

Partly cloudy, with a low around 70.

Tuesday

Sunny, with a high near 91.