Unsettled Weather in the Eastern U.S. through Memorial Day

Showers and thunderstorms are expected from Texas to the Northeast through Tuesday. Heavy rain will create mainly localized areas of flash flooding across the central Gulf Coast into the Appalachians. Elevated to Critical fire weather conditions due to gusty winds and low humidity are expected through Tuesday across Oregon and Nevada. Showers and thunderstorms will develop over the Northwest. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

68°F

20°C

Humidity	87%
Wind Speed	Calm
Barometer	30.02 in
Dewpoint	64°F (18°C)
Visibility	10.00 mi
Last update	25 May 11:15 pm CDT

More Information:

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

Extended Forecast for

Simpson IL

Tonight
Low: 63 °F
Chance
Showers
Tuesday
High: 78 °F
Showers
Tuesday Night
Low: 64 °F
Chance
Showers
Wednesday
High: 83 °F
Chance
Showers then
Showers
Likely
Wednesday Night
Low: 64 °F
Slight Chance
T-storms then
Slight Chance
Showers
Thursday
High: 83 °F
Partly Sunny
then Chance
T-storms
Thursday Night
Low: 64 °F
Mostly Cloudy
then Slight
Chance
Showers
Friday
High: 75 °F
Chance
Showers
Friday Night
Low: 62 °F
Chance
Showers

Detailed Forecast

Tonight

A 30 percent chance of showers, mainly after 5am. Mostly cloudy, with a low around 63. Calm wind.

Tuesday

Showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. High near 78. Calm wind becoming east northeast around 5 mph in the afternoon. Chance of precipitation is 80%.

Tuesday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Calm wind. Chance of precipitation is 40%.

Wednesday

A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 83. Calm wind becoming southwest around 5 mph. Chance of precipitation is 60%.

Wednesday Night

A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 64. Calm wind. Chance of precipitation is 20%.

Thursday

A 40 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 83. Calm wind becoming east northeast around 6 mph in the afternoon.

Thursday Night

A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 64. Light east northeast wind.

Friday

A chance of showers. Mostly cloudy, with a high near 75. Calm wind becoming east northeast 5 to 7 mph in the morning.

Friday Night

A chance of showers, mainly after 1am. Mostly cloudy, with a low around 62. East northeast wind around 5 mph becoming calm in the evening.

Saturday

A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79. Northeast wind 3 to 8 mph.

Saturday Night

Partly cloudy, with a low around 59. Northeast wind around 6 mph becoming calm in the evening.

Sunday

Mostly sunny, with a high near 78. Northeast wind 5 to 9 mph.