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 Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Partly Cloudy

69°F

21°C

Humidity	96%
Wind Speed	Calm
Barometer	29.96 in
Dewpoint	68°F (20°C)
Visibility	10.00 mi
Last update	20 Aug 6:15 am CDT

More Information:

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

Extended Forecast for

Piasa IL

Today
High: 82 °F
Mostly Sunny
then Isolated
Showers
Tonight
Low: 62 °F
Mostly Clear
Friday
High: 85 °F
Patchy Fog
then Sunny
Friday Night
Low: 66 °F
Partly Cloudy
Saturday
High: 83 °F
Sunny
Saturday Night
Low: 61 °F
Mostly Clear
Sunday
High: 81 °F
Mostly Sunny
Sunday Night
Low: 60 °F
Mostly Cloudy
Monday
High: 81 °F
Mostly Sunny

Detailed Forecast

Today

Isolated showers after 1pm. Increasing clouds, with a high near 82. Calm wind becoming northeast 5 to 7 mph in the morning. Chance of precipitation is 20%.

Tonight

Mostly clear, with a low around 62. Northeast wind around 5 mph becoming calm in the evening.

Friday

Patchy fog before 8am. Otherwise, sunny, with a high near 85. Calm wind becoming west around 5 mph in the afternoon.

Friday Night

Partly cloudy, with a low around 66. Light and variable wind.

Saturday

Sunny, with a high near 83. Light northwest wind increasing to 5 to 9 mph in the morning.

Saturday Night

Mostly clear, with a low around 61.

Sunday

Mostly sunny, with a high near 81.