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.

Fog/Mist

73°F

23°C

Humidity	95%
Wind Speed	SE 3 mph
Barometer	29.94 in
Dewpoint	72°F (22°C)
Visibility	5.00 mi
Last update	26 Jul 12:55 am 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

Overnight
Low: 69 °F
Chance
Showers
Sunday
High: 90 °F
Chance
Showers then
Mostly Sunny
Sunday Night
Low: 75 °F
Partly Cloudy
then Chance
Showers
Monday
High: 94 °F
Chance
Showers then
Sunny
Monday Night
Low: 70 °F
Mostly Clear
Tuesday
High: 86 °F
Mostly Sunny
Tuesday Night
Low: 62 °F
Mostly Clear
Wednesday
High: 86 °F
Sunny
Wednesday Night
Low: 62 °F
Mostly Clear

Detailed Forecast

Overnight

A 30 percent chance of showers and thunderstorms, mainly after 5am. Mostly cloudy, with a low around 69. South wind around 5 mph becoming calm.

Sunday

A 30 percent chance of showers and thunderstorms, mainly before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 90. Heat index values as high as 102. South wind 5 to 10 mph.

Sunday Night

A 30 percent chance of showers and thunderstorms, mainly between 4am and 5am. Partly cloudy, with a low around 75. Southwest wind around 5 mph becoming northeast after midnight.

Monday

A 50 percent chance of showers and thunderstorms, mainly before 9am. Mostly sunny, with a high near 94. Heat index values as high as 109. South 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 86.

Tuesday Night

Mostly clear, with a low around 62.

Wednesday

Sunny, with a high near 86.

Wednesday Night

Mostly clear, with a low around 62.

Thursday

Mostly sunny, with a high near 86.