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.

Mostly Cloudy

76°F

24°C

Humidity	88%
Wind Speed	E 3 mph
Barometer	29.92 in (1012.1 mb)
Dewpoint	72°F (22°C)
Visibility	10.00 mi
Heat Index	76°F (24°C)
Last update	19 Aug 11:51 pm CDT

More Information:

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

Extended Forecast for

2 Miles ENE Florissant MO

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

Detailed Forecast

Overnight

Isolated showers and thunderstorms between 2am and 4am. Patchy fog after 5am. Otherwise, mostly clear, with a low around 70. Light north wind. Chance of precipitation is 20%.

Thursday

Patchy fog before 8am. Otherwise, partly sunny, with a high near 85. North wind 3 to 7 mph.

Thursday Night

Patchy fog after 5am. Otherwise, mostly clear, with a low around 68. Northeast wind around 6 mph becoming calm in the evening.

Friday

Patchy fog before 8am. Otherwise, sunny, with a high near 88. Calm wind becoming west around 5 mph in the afternoon.

Friday Night

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

Saturday

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

Saturday Night

Mostly clear, with a low around 67.