National Weather Service

News Headlines

Hazardous Weather Conditions

Current conditions at

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

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

75°F

24°C

Humidity	90%
Wind Speed	Calm
Barometer	29.98 in (1014.1 mb)
Dewpoint	72°F (22°C)
Visibility	10.00 mi
Last update	19 Aug 2:54 am CDT

More Information:

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

Extended Forecast for

Weldon Spring MO

Heat Advisory August 19, 03:02am until August 19, 08:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory August 19, 03:02am until August 19, 08:00pm
NOW until 8:00pm Tue
Heat Advisory
Overnight
Low: 74 °F
Mostly Clear
Tuesday
High: 93 °F
Slight Chance
T-storms
Tuesday Night
Low: 71 °F
Slight Chance
T-storms then
Partly Cloudy
Wednesday
High: 85 °F
Mostly Sunny
Wednesday Night
Low: 65 °F
Mostly Clear
Thursday
High: 84 °F
Sunny
Thursday Night
Low: 64 °F
Mostly Clear
Friday
High: 86 °F
Sunny

Detailed Forecast

Overnight

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

Tuesday

A 20 percent chance of showers and thunderstorms. Sunny, with a high near 93. Heat index values as high as 105. Light and variable wind becoming northwest 5 to 7 mph in the morning.

Tuesday Night

A 20 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 71. North wind 3 to 7 mph.

Wednesday

Mostly sunny, with a high near 85. Northeast wind 5 to 9 mph.

Wednesday Night

Mostly clear, with a low around 65. Northeast wind 5 to 7 mph.

Thursday

Sunny, with a high near 84.

Thursday Night

Mostly clear, with a low around 64.

Friday

Sunny, with a high near 86.