A freeze watch will be in effect Tuesday night and Wednesday morning, Sept. 8-9, for most of northern Minnesota, including Cass and Crow Wing counties, with temperatures in the low 30s expected.

The National Weather Service in Duluth, which issued the watch Monday afternoon, noted the potential of sub-freezing temperatures and frost could “kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.”

The weather service advised residents to take steps to protect tender plants from the cold; and wrap, drain or allow to slowly drip all outdoor water pipes. The weather service also recommended draining in-ground sprinkler systems.

Temperatures are expected to slowly warm throughout the week. High temperatures in the mid 50s and low temperatures in the mid to low 30s on Tuesday and Wednesday will gradually give way to high temperatures in the mid 60s and low temperatures in the mid 40s and low 50s by Thursday and Friday, according to the weather service’s forecast for Brainerd.

Aitkin and Wadena counties are included in the freeze watch Tuesday night and Wednesday morning. Northern Cass and Aitkin counties are also in a frost advisory Tuesday.