Thunderstorms and Heavy Rains Across Portions of the Central and Eastern US; Heat Expands to Portions of the East

Widespread showers and thunderstorms, some severe, may produce heavy downpours and flash flooding across much of the eastern and central U.S. Dangerous heat will continue in the Pacific Northwest and expand across portions of the East. Deep tropical moisture and associated thunderstorms will bring heavy rainfall and localized flash flooding across portions of Florida into the central Gulf Coast. Read More >

Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Overcast

74°F

23°C

Humidity	96%
Wind Speed	SW 5 mph
Barometer	29.96 in
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Last update	16 Jul 1:55 am CDT

More Information:

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

Extended Forecast for

Herrin IL

Heat Advisory July 16, 12:00pm until July 16, 07:00pm

Click here for hazard details and duration

Heat Advisory

Overnight
Low: 74 °F
Isolated
T-storms
Wednesday
High: 93 °F
Scattered
T-storms
Wednesday Night
Low: 76 °F
Mostly Clear
then Isolated
T-storms
Thursday
High: 95 °F
Mostly Sunny
then
Scattered
T-storms
Thursday Night
Low: 74 °F
Scattered
T-storms
Friday
High: 90 °F
Scattered
T-storms then
T-storms
Likely
Friday Night
Low: 75 °F
Isolated
T-storms
Saturday
High: 91 °F
Scattered
T-storms
Saturday Night
Low: 76 °F
Isolated
T-storms

Detailed Forecast

Overnight

Isolated showers and thunderstorms. Partly cloudy, with a low around 74. Light south southwest wind. Chance of precipitation is 20%.

Wednesday

Isolated showers, then scattered showers and thunderstorms after 10am. Mostly sunny, with a high near 93. Southwest wind 5 to 8 mph. Chance of precipitation is 30%.

Wednesday Night

Isolated showers and thunderstorms after 1am. Mostly clear, with a low around 76. South southwest wind 3 to 6 mph. Chance of precipitation is 20%.

Thursday

Scattered showers and thunderstorms after 1pm. Mostly sunny, with a high near 95. Heat index values as high as 107. West southwest wind 5 to 7 mph. Chance of precipitation is 40%.

Thursday Night

Scattered showers and thunderstorms. Mostly cloudy, with a low around 74. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.

Friday

Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 90. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 60%.

Friday Night

Isolated showers and thunderstorms. Partly cloudy, with a low around 75. Light south southeast wind. Chance of precipitation is 20%.

Saturday

Scattered showers and thunderstorms. Partly sunny, with a high near 91. Southwest wind 3 to 8 mph.

Saturday Night

Isolated showers and thunderstorms. Partly cloudy, with a low around 76. South southwest wind 3 to 6 mph.

Sunday

Scattered showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 93. Southwest wind 5 to 7 mph.

Sunday Night

Scattered showers and thunderstorms. Partly cloudy, with a low around 77. South wind 3 to 6 mph.

Monday

Scattered showers and thunderstorms. Mostly sunny, with a high near 94. South southwest wind 5 to 8 mph.