Thunderstorms and Heavy Rainfall in the Southeast, Montana, and Iowa; Lowell Begins to Impact Hawaii

Strong thunderstorms with damaging winds and heavy rain are expected across portions of the Southeast. Thunderstorms may produce large hail across portions of Montana. Heavy rainfall could produce flash flooding across Iowa and vulnerable areas in Utah. Lowell will bring heavy rain, dangerous swells and rip currents to portions of Hawaii. Sweltering heat persists across the South-Central US. Read More >

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Overcast

79°F

26°C

Humidity	77%
Wind Speed	N 5 mph
Barometer	30.04 in (1016.9 mb)
Dewpoint	71°F (22°C)
Visibility	10.00 mi
Heat Index	82°F (28°C)
Last update	6 Sep 11:53 am CDT

More Information:

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

Extended Forecast for

Swansea IL

This Afternoon
High: 91 °F
Gradual
Clearing
Tonight
Low: 65 °F
Partly Cloudy
Labor Day
High: 91 °F
Sunny
Monday Night
Low: 64 °F
Partly Cloudy
Tuesday
High: 96 °F
Sunny
Tuesday Night
Low: 74 °F
Mostly Clear
Wednesday
High: 100 °F
Hot
Wednesday Night
Low: 72 °F
Chance
T-storms then
Showers
Likely
Thursday
High: 86 °F
Chance
Showers

Detailed Forecast

This Afternoon

Cloudy early, then gradual clearing, with a high near 91. Northeast wind around 9 mph.

Tonight

Partly cloudy, with a low around 65. Northeast wind 5 to 10 mph.

Labor Day

Sunny, with a high near 91. East wind 5 to 7 mph.

Monday Night

Partly cloudy, with a low around 64. East wind around 6 mph becoming calm after midnight.

Tuesday

Sunny, with a high near 96. Calm wind becoming south 5 to 7 mph in the morning.

Tuesday Night

Mostly clear, with a low around 74.

Wednesday

Sunny and hot, with a high near 100.

Wednesday Night

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 72. Chance of precipitation is 60%.

Thursday

A 50 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 86.

Thursday Night

A 20 percent chance of showers after 1am. Partly cloudy, with a low around 65.

Friday

A 20 percent chance of showers. Sunny, with a high near 88.

Friday Night

A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 65.

Saturday

A 20 percent chance of showers. Sunny, with a high near 92.