Heat Persists in the South Central U.S. and Southwest; Heavy rains in the Desert Southwest and Central Plains

Sweltering heat remains across the South-Central Plains, Lower/Middle Mississippi Valley, and the Southwest this week with limited nighttime relief. Thunderstorms will bring heavy rainfall leading to localized flash flooding in portions of the Desert Southwest and central Plains. Isolated strong to severe thunderstorms are possible across portions of the central Plains into the Northeast. Read More >

Hazardous Weather Conditions

Air Quality Alert

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

77°F

25°C

Humidity	67%
Wind Speed	Calm
Barometer	30.07 in
Dewpoint	65°F (18°C)
Visibility	10.00 mi
Heat Index	79°F (26°C)
Last update	9 Sep 12:55 am CDT

More Information:

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

Extended Forecast for

2 Miles WSW Pierron IL

Overnight
Low: 73 °F
Mostly Clear
Wednesday
High: 96 °F
Slight Chance
Showers then
Slight Chance
T-storms
Wednesday Night
Low: 70 °F
Chance
T-storms then
T-storms
Thursday
High: 79 °F
Showers then
Showers
Likely
Thursday Night
Low: 63 °F
Mostly Cloudy
Friday
High: 84 °F
Partly Sunny
then Slight
Chance
Showers
Friday Night
Low: 66 °F
Mostly Clear
Saturday
High: 91 °F
Slight Chance
T-storms
Saturday Night
Low: 68 °F
Chance
T-storms

Detailed Forecast

Overnight

Mostly clear, with a low around 73. South wind 3 to 6 mph.

Wednesday

A slight chance of showers before 11am, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 96. Heat index values as high as 104. South wind 6 to 9 mph becoming west in the morning. Chance of precipitation is 20%.

Wednesday Night

Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1am. Low around 70. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 90%.

Thursday

Showers and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms, mainly between 1pm and 3pm. High near 79. Calm wind becoming north around 6 mph in the morning. Chance of precipitation is 90%.

Thursday Night

Mostly cloudy, with a low around 63. Calm wind.

Friday

A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 84.

Friday Night

Mostly clear, with a low around 66.

Saturday

A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.

Saturday Night

A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.

Sunday

A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.