1 of 1
Story summary
- A winter storm is approaching the upper Midwest, with Wisconsin expected to see significantly colder temperatures, though Milwaukee's forecast remains slightly above minus 20 degrees.
- Forest health specialist Bill McNee explains frost cracks occur when sap freezes and expands, causing loud noises and potential branch falls.
- Severe pressure can cause tree explosions, though such events are rare.
- Most trees can heal cracks.
- Residents are urged to monitor tree conditions.
