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.

Mostly Cloudy

90°F

32°C

Humidity	63%
Wind Speed	SE 8 mph
Barometer	30.04 in (1015.7 mb)
Dewpoint	76°F (24°C)
Visibility	10.00 mi
Heat Index	101°F (38°C)
Last update	15 Aug 3:51 pm CDT

More Information:

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

Extended Forecast for

Saint Charles MO

Extreme Heat Warning August 15, 04:09pm until August 16, 09:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning August 15, 04:09pm until August 16, 09:00pm
NOW until 9:00pm Sun
Extreme Heat Warning
Tonight
Low: 77 °F
Partly Cloudy
Sunday
High: 93 °F
Mostly Sunny
then Slight
Chance
T-storms
Sunday Night
Low: 71 °F
Chance
T-storms
Monday
High: 85 °F
Mostly Sunny
Monday Night
Low: 67 °F
Partly Cloudy
Tuesday
High: 89 °F
Sunny
Tuesday Night
Low: 73 °F
Partly Cloudy
then Slight
Chance
T-storms
Wednesday
High: 88 °F
Chance
Showers

Detailed Forecast

Tonight

Partly cloudy, with a low around 77. Calm wind becoming southwest around 6 mph after midnight.

Sunday

A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 93. Heat index values as high as 107. South wind 5 to 7 mph becoming northwest in the afternoon.

Sunday Night

A 30 percent chance of showers and thunderstorms, mainly before 3am. Partly cloudy, with a low around 71. Northwest wind 5 to 8 mph.

Monday

Mostly sunny, with a high near 85. North wind around 6 mph.

Monday Night

Partly cloudy, with a low around 67. North wind around 5 mph becoming calm in the evening.

Tuesday

Sunny, with a high near 89.

Tuesday Night

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

Wednesday

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