Excessive Rainfall Potential for the Southeast; Heat Expands for Center of the Nation; Critical Fire Weather for Pacific Northwest

Flash flooding threatens areas from the Tennessee Valley to the Carolinas as storms repeat along a stalled front. Monsoonal storms may trigger flooding in the Southwest. Dangerous heat expands across the Desert Southwest, Plains, mid-Mississippi Valley and Southern Tier. Critical fire weather for interior Pacific Northwest. Cooler, drier air brings brief relief to the Great Lakes and Northeast. Read More >

Hazardous Weather Conditions

Current conditions at

Tri-Township Airport (KSFY)

Lat: 42.05°NLon: 90.11°WElev: 614ft.

Mostly Cloudy

73°F

23°C

Humidity	95%
Wind Speed	SE 3 mph
Barometer	29.93 in
Dewpoint	71°F (22°C)
Visibility	7.00 mi
Last update	25 Jul 10:15 pm CDT

More Information:

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

Extended Forecast for

Lanark IL

Extreme Heat Watch July 26, 09:00pm until July 27, 10:00pm

Heat Advisory July 26, 11:00am until July 26, 09:00pm

Click here for hazard details and duration

Extreme Heat Watch

Heat Advisory

Tonight
Low: 69 °F
Mostly Clear
then Chance
T-storms
Sunday
High: 90 °F
Chance
T-storms
Sunday Night
Low: 75 °F
Partly Cloudy
then Slight
Chance
T-storms
Monday
High: 92 °F
Chance
T-storms
Monday Night
Low: 70 °F
Mostly Clear
Tuesday
High: 87 °F
Mostly Sunny
Tuesday Night
Low: 63 °F
Mostly Clear
Wednesday
High: 85 °F
Sunny
Wednesday Night
Low: 63 °F
Mostly Clear

Detailed Forecast

Tonight

A 30 percent chance of showers and thunderstorms, mainly after 5am. Increasing clouds, with a low around 69. South wind around 5 mph.

Sunday

A 30 percent chance of showers and thunderstorms, mainly before 7am. Partly sunny, with a high near 90. Heat index values as high as 105. Southwest wind 5 to 10 mph.

Sunday Night

A 20 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 75. Southwest wind 5 to 10 mph.

Monday

A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 92. Heat index values as high as 106. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.

Monday Night

Mostly clear, with a low around 70.

Tuesday

Mostly sunny, with a high near 87.

Tuesday Night

Mostly clear, with a low around 63.

Wednesday

Sunny, with a high near 85.

Wednesday Night

Mostly clear, with a low around 63.

Thursday

Mostly sunny, with a high near 86.