Thunderstorms Over the Southeast U.S. and Northern Rockies; Critical Fire Weather Conditions in the Plains

Isolated severe thunderstorms and showers will bring a flash flood threat across the Southeast. Scattered severe wind gusts are expected across the northern Rockies into the Plains. Elevated to Critical fire weather conditions are expected across the north/central Plains and Upper Midwest. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

70°F

21°C

Humidity	57%
Wind Speed	NE 5 mph
Barometer	30.03 in (1016.5 mb)
Dewpoint	54°F (12°C)
Visibility	10.00 mi
Last update	11 May 9:52 pm CDT

More Information:

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

Extended Forecast for

Saint Johns IL

Tonight
Low: 60 °F
Mostly Cloudy
then Chance
T-storms
Monday
High: 74 °F
Showers
Likely then
T-storms
Likely
Monday Night
Low: 61 °F
T-storms
Likely then
Chance
Showers
Tuesday
High: 77 °F
Chance
Showers then
Showers
Likely
Tuesday Night
Low: 61 °F
Mostly Clear
Wednesday
High: 82 °F
Sunny
Wednesday Night
Low: 67 °F
Partly Cloudy
Thursday
High: 89 °F
Mostly Sunny
Thursday Night
Low: 66 °F
Slight Chance
T-storms

Detailed Forecast

Tonight

A 50 percent chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 60. East northeast wind around 5 mph.

Monday

Showers likely and possibly a thunderstorm, mainly before 4pm, then showers and thunderstorms likely after 4pm. Mostly cloudy, with a high near 74. East wind 5 to 9 mph. Chance of precipitation is 70%.

Monday Night

Showers and thunderstorms likely before 10pm, then a chance of showers between 10pm and 1am. Mostly cloudy, with a low around 61. East southeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%.

Tuesday

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 77. Light south wind. Chance of precipitation is 70%.

Tuesday Night

Mostly clear, with a low around 61. Calm wind.

Wednesday

Sunny, with a high near 82. Light south southeast wind increasing to 5 to 9 mph in the morning.

Wednesday Night

Partly cloudy, with a low around 67. South southeast wind around 6 mph.

Thursday

Mostly sunny, with a high near 89. South wind 7 to 13 mph, with gusts as high as 21 mph.

Thursday Night

A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 66. West southwest wind 6 to 10 mph.

Friday

A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. Southwest wind 6 to 10 mph.