Severe Thunderstorms and Excessive Rainfall in the Central U.S.; Heat Building in the Western U.S.

A cold front pressing east across the central U.S. will be the focus for areas of strong to severe thunderstorms and excessive rainfall through this weekend. Strong to severe thunderstorms my bring damaging winds, hail, and a few tornadoes while excessive rainfall may lead to areas of flooding. Heat will build across the western U.S. with heat-related watches, warnings, and advisories issued. 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

73°F

23°C

Humidity	96%
Wind Speed	Calm
Barometer	30.03 in
Dewpoint	72°F (22°C)
Visibility	10.00 mi
Last update	12 Jul 11:35 pm CDT

More Information:

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

Extended Forecast for

Herrin IL

Tonight
Low: 72 °F
Patchy Fog
Sunday
High: 90 °F
Slight Chance
T-storms and
Patchy Fog
then T-storms
Likely
Sunday Night
Low: 71 °F
T-storms
Likely then
Chance
Showers and
Patchy Fog
Monday
High: 89 °F
Patchy Fog
then Chance
T-storms
Monday Night
Low: 73 °F
Slight Chance
T-storms
Tuesday
High: 91 °F
Slight Chance
T-storms then
Chance
T-storms
Tuesday Night
Low: 74 °F
Slight Chance
T-storms
Wednesday
High: 93 °F
Chance
T-storms
Wednesday Night
Low: 75 °F
Chance
T-storms

Detailed Forecast

Tonight

Patchy fog after 1am. Otherwise, partly cloudy, with a low around 72. Calm wind.

Sunday

Showers and thunderstorms likely, mainly after 4pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 90. Calm wind becoming south southwest around 5 mph. Chance of precipitation is 70%.

Sunday Night

Showers and thunderstorms likely before 10pm, then a chance of showers between 10pm and 1am. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 71. Light west southwest wind. Chance of precipitation is 60%.

Monday

A 40 percent chance of showers and thunderstorms after 1pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 89. Calm wind becoming south southwest around 5 mph in the afternoon.

Monday Night

A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Light south southeast wind. Chance of precipitation is 20%.

Tuesday

A slight chance of showers, then a chance of showers and thunderstorms after 10am. Partly sunny, with a high near 91. Calm wind becoming south southwest 5 to 7 mph in the morning. Chance of precipitation is 50%.

Tuesday Night

A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74. South southwest wind around 6 mph becoming calm in the evening.

Wednesday

A chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 93. Southwest wind 3 to 8 mph.

Wednesday Night

A chance of showers and thunderstorms. Partly cloudy, with a low around 75. South southwest wind 3 to 7 mph.

Thursday

A chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 93. South southwest wind 5 to 8 mph.

Thursday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Southwest wind 3 to 7 mph.

Friday

A chance of showers and thunderstorms. Partly sunny, with a high near 90. West wind around 6 mph.

Friday Night

A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 72. West wind around 5 mph becoming calm in the evening.