Lala Impacting Hawaii; Flash Flooding Risks; Excessive Heat

Lala will continue to impact Hawaii through the weekend. Heavy rainfall, strong winds, dangerous surf and localized flooding are expected. Thunderstorms, heavy rainfall and flash flooding concerns from the mid-Mississippi Valley, Ohio Valley into the central Appalachians and the mid-Atlantic through today. Record heat continues for areas of the Mississippi Valley into the Southeast. Read More >

Hazardous Weather Conditions

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

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Mostly Cloudy

83°F

28°C

Humidity	72%
Wind Speed	S 3 mph
Barometer	30.03 in (1016.5 mb)
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Heat Index	89°F (32°C)
Last update	16 Aug 8:53 am CDT

More Information:

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

Extended Forecast for

3 Miles WSW Arnold MO

Extreme Heat Warning August 16, 09:39am until August 16, 09:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning August 16, 09:39am until August 16, 09:00pm
NOW until 9:00pm Sun
Extreme Heat Warning
Today
High: 94 °F
T-storms then
Mostly Sunny
Tonight
Low: 72 °F
Chance
T-storms
Monday
High: 85 °F
Becoming
Sunny
Monday Night
Low: 67 °F
Mostly Clear
Tuesday
High: 90 °F
Sunny
Tuesday Night
Low: 71 °F
Partly Cloudy
then Chance
T-storms
Wednesday
High: 89 °F
Chance
Showers
Wednesday Night
Low: 68 °F
Chance
T-storms

Detailed Forecast

Today

Showers and thunderstorms, mainly before 10am. High near 94. Heat index values as high as 109. Calm wind becoming west around 6 mph in the morning. Chance of precipitation is 90%.

Tonight

A 40 percent chance of showers and thunderstorms, mainly between 8pm and 4am. Mostly cloudy, with a low around 72. North wind 3 to 6 mph.

Monday

Partly sunny, then gradually becoming sunny, with a high near 85. North wind 5 to 8 mph.

Monday Night

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

Tuesday

Sunny, with a high near 90. Calm wind.

Tuesday Night

A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 71.

Wednesday

A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 89.

Wednesday Night

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.

Thursday

A 40 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 82.

Thursday Night

A slight chance of showers and thunderstorms, then a chance of showers after 1am. Partly cloudy, with a low around 65. Chance of precipitation is 30%.

Friday

Mostly sunny, with a high near 83.

Friday Night

Partly cloudy, with a low around 65.

Saturday

Mostly sunny, with a high near 85.