A CHILLY NIGHT: FROST ADVISORY for parts of Minnesota

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Meteorologist Steve Frazier Meteorologist Steve Frazier
 A CHILLY NIGHT: FROST ADVISORY for parts of Minnesota

Our “Slow Low” is moving on and behind it is the cooler air. High temperatures for the week will run as much as 15° below average as the “Sit and Spin” low pulls in the colder weather behind it. We are not talking snow, but we are talking frost, at least for part of Minnesota early Wednesday morning. Below is the latest advisory from the National Weather Service as of 4 PM Tuesday afternoon.

Most of the frost will affect low lying areas in the outskirts of the major urban areas. Look for temps to fall into the 32° to 37° range, which could cause damage to some plants. I hear stories of a lot of you who have already planted your spring gardens. You can protect plants by covering them, or if possible, bringing them indoors. We are expecting a frost and not a freeze, but if temps do hit freezing, this is how your plants could be affected.

Light freeze: 29 degrees F to 32 degrees F — tender plants killed, with little destructive effect on other vegetation.

Moderate freeze:
25 degrees F to 28 degrees F — widely destructive effect on most vegetation, with heavy damage to fruit blossoms and tender and semi-hardy plants.

Severe freeze:
24 degrees F and colder — damage to most plants 

For those of you who have not yet planted outdoors, The general rule is to wait until after Memorial Day to plant. As you can see from the average last frost dates below, we seem to break the rules here in the Upper Midwest but this latest threat of frost is actually average until the end of May.

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