National Weather Service

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August 11, 2026: Derecho produces widespread wind damage and tornadoes across northern Illinois and northwest Indiana

Current conditions at

Valparaiso Porter County Municipal Airport (KVPZ)

Lat: 41.45°NLon: 87°WElev: 768ft.

Fair

63°F

17°C

Humidity	93%
Wind Speed	W 3 mph
Barometer	30.04 in (1016.9 mb)
Dewpoint	61°F (16°C)
Visibility	10.00 mi
Last update	17 Aug 11:56 pm CDT

More Information:

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

Extended Forecast for

4 Miles S Tefft IN

Overnight
Low: 61 °F
Mostly Clear
Tuesday
High: 80 °F
Mostly Sunny
Tuesday Night
Low: 67 °F
Chance
T-storms
Wednesday
High: 76 °F
Partly Sunny
then Slight
Chance
T-storms
Wednesday Night
Low: 59 °F
Partly Cloudy
Thursday
High: 76 °F
Sunny
Thursday Night
Low: 56 °F
Mostly Clear
Friday
High: 77 °F
Sunny
Friday Night
Low: 60 °F
Chance
Showers

Detailed Forecast

Overnight

Mostly clear, with a low around 61. Calm wind becoming west southwest around 5 mph.

Tuesday

Mostly sunny, with a high near 80. West southwest wind 5 to 10 mph, with gusts as high as 15 mph.

Tuesday Night

A 50 percent chance of showers and thunderstorms, mainly after 8pm. Mostly cloudy, with a low around 67. Southwest wind around 5 mph, with gusts as high as 10 mph.

Wednesday

A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 76. Calm wind becoming north northwest around 5 mph in the afternoon. Winds could gust as high as 10 mph.

Wednesday Night

Partly cloudy, with a low around 59. North wind around 5 mph becoming calm.

Thursday

Sunny, with a high near 76.

Thursday Night

Mostly clear, with a low around 56.

Friday

Sunny, with a high near 77.

Friday Night

A chance of showers. Partly cloudy, with a low around 60.

Saturday

A chance of showers after 1pm. Mostly sunny, with a high near 75.