A Heat Burst Happened Sunday Morning: What Is It??

news image
Top Stories
23 Jun 2025 8:50 AM

Sounds like something out of science fiction, right? These are relatively rare, but sometimes, the temperature can jump rapidly in the early morning hours, like it did this morning in Perham, MN. So, how does it happen? What do you need to see the thermometer jump almost 20° without much warning? There are two big ingredients you'll need: a dying storm and some warm air just off the surface.

As that storm falls apart, the rain-cooled air will shove the warmer, drier air down to the surface. The temperature shot from about 80 all the way up to 97 in a matter of 30 minutes between 7:00 and 8:00 AM.

Usually, these happen in the morning hours, when an inversion will displace the warmer air aloft as we cool off overnight.

All Weather News
More
Slow-Moving Front Could Turn Tropical This Week

Slow-Moving Front Could Turn Tropical This Week

Early in the season, we watch closer to the c

29 Jun 2026 10:45 AM
Dangerous Stretch of Heat Shaping Up This Week

Dangerous Stretch of Heat Shaping Up This Week

The hottest temperatures of the year are loom

29 Jun 2026 10:40 AM
Northwestern Trough: From Snow to Severe

Northwestern Trough: From Snow to Severe

A significant early-summer trough is digging

29 Jun 2026 10:35 AM
Massive Fires Burn in Utah, Extreme Fire Danger Continues

Massive Fires Burn in Utah, Extreme Fire Danger Continues

Photo: Iron Fire getting doused with a retard

29 Jun 2026 10:25 AM
'MCS' Season Brings Severe and Flooding Threats Across the Southeast

'MCS' Season Brings Severe and Flooding Threats Across the Southeast

As Summer settles in across the Central U.S.,

28 Jun 2026 2:10 AM
Severe Threat Tracks into the Northeast Friday

Severe Threat Tracks into the Northeast Friday

Another day, another Illinois tornado. That's

26 Jun 2026 2:25 AM
Flood Threat Persists This Week

Flood Threat Persists This Week

New rounds of rainfall are expected to contin

25 Jun 2026 11:30 AM