Severe Thunderstorms in the Midwest and Arizona; Heat Continues in the Southeast and Southwest

Thunderstorms, some severe, may lead to scattered instances of flash flooding across the Midwest and Ohio Valley and southern Arizona. The threat will shift to the Mid-Atlantic coast on Thursday. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Overcast

81°F

27°C

Humidity	72%
Wind Speed	Calm
Barometer	29.91 in (1011.6 mb)
Dewpoint	71°F (22°C)
Visibility	10.00 mi
Heat Index	85°F (29°C)
Last update	19 Aug 5:51 pm CDT

More Information:

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

Extended Forecast for

Lambert-St. Louis International Airport MO

Tonight
Low: 70 °F
Chance
T-storms and
Patchy Fog
Thursday
High: 85 °F
Patchy Fog
then Mostly
Sunny
Thursday Night
Low: 68 °F
Mostly Clear
Friday
High: 88 °F
Sunny
Friday Night
Low: 70 °F
Mostly Clear
then Slight
Chance
T-storms
Saturday
High: 86 °F
Slight Chance
Showers
Saturday Night
Low: 68 °F
Mostly Clear
Sunday
High: 84 °F
Mostly Sunny
Sunday Night
Low: 67 °F
Slight Chance
T-storms

Detailed Forecast

Tonight

A 30 percent chance of showers and thunderstorms, mainly before 1am. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 70. East wind around 5 mph becoming calm in the evening.

Thursday

Patchy fog before 8am. Otherwise, partly sunny, with a high near 85. Northeast wind 3 to 6 mph.

Thursday Night

Mostly clear, with a low around 68. Northeast wind around 5 mph becoming calm in the evening.

Friday

Sunny, with a high near 88. Light and variable wind.

Friday Night

A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 70. Light west wind.

Saturday

A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 86.

Saturday Night

Mostly clear, with a low around 68.