Frost throughout most of Minnesota is likely Friday night into Saturday morning and many places could see temperatures drop below freezing for the first time in a long time.
The last time it dipped below 32 degrees in the Twin Cities was April 20 when the low was 28 degrees. The cold will arrive after a cold front zips through the state on Thursday, setting the state for Canadian high pressure to bring the big chill.
"Frost looks likely all the way down into southern Minnesota, with the exception of the inner core of the Twin Cities metro where the urban heat island influence will be tough to overcome," says the forecast discussion from the Twin Cities office of the National Weather Service (NWS).
Freezing temperatures also look likely north of Interstate 94 Saturday morning, but it probably won't dip below freezing for the bulk of the metro area, the NWS says.
That said, if skies stay clear overnight, freezing temperatures might be possible in southern Minnesota, too.
A precursor for the chilly weather came this morning (Wednesday) when temps across central Minnesota dipped into the 30s, including an overnight low of 35 in St. Cloud.
As you can see in the map below, the first hard freeze for most of Minnesota happens in the Sep. 21-30 window, while it happens for the first time on average in the Twin Cities metro between Oct. 1-10.
Overall, temperatures Friday-Sunday will be running 10-15 degrees cooler than normal.
Oh, and snow flakes are possible in northern Minnesota over the weekend.