Temperatures did drop below freezing early Friday morning with steady winds setting wind chills down in the low 20's. That will be the theme for Friday afternoon too, with wind chills about 10 degrees cooler than air temps.
Friday temperatures will barely reach the upper 40's and with winds out of the north at 10 to 20 mph it will feel like the upper 30's to low 40's. It will be mostly clear though with plenty of sun.
Friday overnight, the coldest air in the first blast of sub-freezing temperatures has prompted another FREEZE WARNING for the Chippewa Valley. This will be from 1 am to 9 am Saturday morning and some areas may see air temperatures down in the teens.
Mother's Day weekend will be unseasonably cool. Temperatures will be in the low to mid 50's Saturday before struggling to break 50 again Sunday.
It will start sunny, but clouds will gradual grow ahead of the chance for rain and snow Saturday night. A low pressure system will produce scattered rain showers after 7 pm Saturday night. As colder temperatures are expected again in the mid to low 30's, we could see some light snow.
There have only been 3 Mother's Day's with observed snowfall since 1908. The latest coming in 1973 with a trace recorded in Eau Claire.
Accumulation will be difficult to measure with ground temperatures being warmer than freezing, but the chance for accumulating snow can't be ruled out. Anywhere from 0.25'' to 0.6'' of moisture will be available which could translate to an inch of snow, but any mix will cut down those totals.
This precipitation will wrap up Sunday morning with another round of scattered showers being possible Sunday afternoon. The cold weather lasts through the first half of next week.