UPDATED - Wednesday Snow Predictions
By Justin Poublon
December 12, 2017 - 7:00 PM CST | 90 0
8:15 AM Wednesday - Snow band has come in a bit north of where first anticipated. Large dry slot over southern Wisconsin. I think the heaviest snows will fall from Suring to Algoma in northeast Wisconsin. To the south, light freezing drizzle/mist is possible finishing with light snow or flurries tonight w/ little or no accumulation.
7:00 PM Tuesday - Winter Weather Advisories have been issued for a large portion of eastern Wisconsin starting early tomorrow morning until 6 PM Wednesday night. A strong quick hitting Alberta clipper will track over southwest Wisconsin producing snow across northern and central Wisconsin. Current predictions are for 3-6" of snow accumulation across northeast and east-central Wisconsin, with locally higher amounts possible near Lake Michigan.
There will be a sharp cutoff on the southern side of the system where amounts could decrease from 6" to 1" in the same county. The forecast is very much so boom or bust. Sleet mix, light freezing rain or drizzle could occur across southern Wisconsin but I wouldn't worry to much about that.
WHEN IS THIS "SNOW" YOU SPEAK OF??
Current radar shows light snow slipping east, not sure how much of that is reaching the ground. The storm will enter northern Wisconsin after midnight tonight
increasing in strength during the morning hours. The low pressure will exit during the early afternoon. Snow will continue across east-central Wisconsin (mostly near lake Michigan) until roughly 6PM
. Left over isolated to scattered snow showers may cross the state during the late afternoon and evening.
Questions remain regarding exact location of the heaviest snow band. We may not know for sure until after midnight where, or even if this band will form. These things are notoriously difficult to forecast. Also watch out for the potential of lake enhancement during the 10AM - 3PM timeframe near Sheboygan, Manitowoc, Kewaunee, Green Bay, and Appleton. The interesting dynamic here is that snow-to-liquid ratios will be lower with lake enhancement but higher intensity snow. Also short duration. So that's tough.
To Thursday...AND BEYOND!
A weak cold front will move through following the storm. Fresh snow cover will make for a cool morning on Thursday, with a chance for another dusting to 1" of light snow overnight into Friday. A weak warming trend will begin Saturday bringing temperatures closer to or above freezing (32F) through the weekend as we prepare for a weather pattern adjustment. The 6-14 day period looks interesting with relatively warmer conditions also potential for bigger storms. :-o