Exploding Trees Possible Across Minnesota, Iowa, and South Dakota

An Arctic blast sweeping across Minnesota, Iowa, and South Dakota is cold enough that it could trigger an unusual and startling phenomenon this weekend: Exploding Trees!

As temperatures plunge to 20 degrees below zero or colder across Minnesota, Iowa, and South Dakota on Friday and Saturday, residents may hear loud booms echoing through frozen forests.

These aren't fireworks...they're trees literally exploding from the extreme cold.

What Causes Trees to Explode?

When temperatures drop this drastically, sap and moisture inside trees freeze rapidly. As water freezes, it expands, creating immense pressure within the trunk.

If temperatures fall quickly enough, this pressure can cause the tree to split or explode with a sound like a gunshot or thunderclap.

The phenomenon, known as "frost cracking" or "cryoseismic booming," typically occurs when temperatures drop below -20°F, especially after milder weather. The sudden temperature swing doesn't give trees time to acclimate, making the freeze more violent.

What to Expect

Trees most vulnerable include those with higher moisture content like oak, maple, and fruit trees. The explosive cracks often happen late at night or early morning when temperatures reach their lowest point.

While dramatic, exploding trees pose minimal danger to people indoors. However, stay alert when walking near wooded areas, as falling branches or split trunks can create hazards.

Stay Safe

Bundle up, limit outdoor exposure during the extreme cold, and don't be alarmed if you hear mysterious booms this weekend—it's just nature responding to Minnesota's legendary winter fury.