National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Great Lakes

Thunderstorms with strong wind gusts and hail will be possible today from Michigan into the Lower Great Lakes region. A significant and dangerous heat wave will expand from the Central U.S. into the Eastern U.S this weekend through much of next week. Numerous daily record highs and warm lows are likely. Read More >

Hazardous Weather Conditions

Current conditions at

Valparaiso Porter County Municipal Airport (KVPZ)

Lat: 41.45°NLon: 87°WElev: 768ft.

Fair and Breezy

87°F

31°C

Humidity 63%
Wind Speed SW 22 G 30 mph
Barometer 29.93 in (1012.9 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index94°F (34°C)
Last update 21 Jun 10:56 am CDT
Extended Forecast for

3 Miles SSE Chesterton IN

Heat Advisory June 21, 11:57am until June 24, 12:00am
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory June 21, 11:57am until June 24, 12:00am

    NOW until 12:00am Tue

    Heat Advisory

  • Today

    High: 92 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Clear, with a low around 77. South southwest wind around 15 mph, with gusts as high as 35 mph.

    Low: 77 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 94. Heat index values as high as 102. South southwest wind around 15 mph, with gusts as high as 25 mph.

    High: 94 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 76. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 76 °F

    Clear

  • Monday

    Monday: Sunny and hot, with a high near 95. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 95 °F

    Hot

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 87.

    High: 87 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 71.

    Low: 71 °F

    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 92. Heat index values as high as 102. Breezy, with a south southwest wind around 20 mph, with gusts as high as 35 mph.
Tonight
Clear, with a low around 77. South southwest wind around 15 mph, with gusts as high as 35 mph.
Sunday
Sunny, with a high near 94. Heat index values as high as 102. South southwest wind around 15 mph, with gusts as high as 25 mph.
Sunday Night
Clear, with a low around 76. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Monday
Sunny and hot, with a high near 95. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Monday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 75.
Tuesday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 87.
Tuesday Night
A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 71.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 71.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE Chesterton IN
 41.57°N 87.05°W
Last Update:
10:41 am CDT Jun 21, 2025
Forecast Valid:
11am CDT Jun 21, 2025-6pm CDT Jun 27, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation