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June 21, 2026 Severe Storm Summary

Hazardous Weather Conditions

Current conditions at

Effingham, Effingham County Memorial Airport (K1H2)

Lat: 39.07°NLon: 88.53°WElev: 587ft.

Partly Cloudy

77°F

25°C

Humidity	96%
Wind Speed	S 7 mph
Barometer	29.91 in
Dewpoint	76°F (24°C)
Visibility	10.00 mi
Heat Index	78°F (26°C)
Last update	27 Jun 5:55 pm CDT

More Information:

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

Extended Forecast for

2 Miles NE Rose Hill IL

Heat Advisory June 28, 01:00pm until June 28, 07:00pm

Flash Flood Warning until June 27, 07:30pm

Click here for hazard details and duration

Heat Advisory

...

Flash Flood Warning until June 27, 07:30pm
NOW until 7:30pm Sat
Flash Flood Warning
Tonight
Low: 70 °F
Chance
T-storms and
Patchy Fog
Sunday
High: 89 °F
Slight Chance
T-storms then
Mostly Sunny
Sunday Night
Low: 73 °F
Partly Cloudy
Monday
High: 92 °F
Mostly Sunny
Monday Night
Low: 74 °F
Mostly Clear
Tuesday
High: 93 °F
Sunny
Tuesday Night
Low: 74 °F
Clear
Wednesday
High: 93 °F
Sunny

Detailed Forecast

Tonight

A 40 percent chance of showers and thunderstorms, mainly after 2am. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 70. Southwest wind around 5 mph becoming calm in the evening.

Sunday

A 20 percent chance of showers and thunderstorms before 8am. Partly sunny, with a high near 89. Heat index values as high as 100. South wind 3 to 7 mph.

Sunday Night

Partly cloudy, with a low around 73. South southeast wind around 7 mph.

Monday

Mostly sunny, with a high near 92. Heat index values as high as 109. South southwest wind 6 to 10 mph, with gusts as high as 17 mph.

Monday Night

Mostly clear, with a low around 74. South wind 6 to 9 mph, with gusts as high as 16 mph.

Tuesday

Sunny, with a high near 93. South southwest wind 5 to 8 mph.

Tuesday Night

Clear, with a low around 74. South southwest wind 3 to 6 mph.

Wednesday

Sunny, with a high near 93.