While major snows have avoided the Stateline of late, Mother Nature has been dealing us a much more active hand of late. Our area's been under some form of weather alert three times since last Friday, and new alerts are nearly certain to be hoisted areawide soon, as yet another storm system takes aim on our region.
Once again, the forecast details for this storm remain somewhat murky. It's appearing quite likely that precipitation from this storm will come in multiple forms. The duration of each singular precipitation type will likely have significant impacts on how much snow or ice accumulation our area will receive, much as was the case last week.
What we know thus far is the following. Precipitation is to overspread the area either late Friday Afternoon or early Friday Evening. We're confident the initial activity will come in the form of snow, and that this snow will last several hours. A few inches of snowfall accumulation are a good bet to occur during this time.
Sometime after midnight, we'll begin to see a transition to sleet or freezing rain from south to north. Should this transition occur earlier, we'd see considerably less snow. Should it take place later, we'd be looking at more snowfall. Timing is everything in these types of storms, and this one will be no different.
As we approach sunrise Saturday, whatever wintry mix that's occurring will then likely transition over to rain, as temperatures rise above freezing. This will serve to eat away at some of the snow that had fallen hours earlier. Precipitation will then wind down late Saturday Morning, and may briefly turn back to light snow or sleet before doing so.
Given the temperature profile of our atmosphere, and the mixed bag of precipitation likely to occur, this storm does not appear to be likely to produce major snowfall totals. Right now, our initial thoughts are that most of the Stateline will be looking at 2 to 4 inches of snow, with lighter amounts to the south, and local 6 inch totals to the north, mainly in Southern Wisconsin. Parts of Central and Northern Wisconsin, those likely to see all snow, will pick up the heaviest snowfall totals.
Though snow amounts are not expected to be astronomically high, the impacts from this storm will still be significant. Travel conditions will deteriorate rapidly Friday Evening, and poor road conditions will continue through Saturday Morning.
Once the storm ends entirely Saturday, temperatures will crash, likely resulting in a flash freeze of many road surfaces that may still be wet.