Winter Storm Warning Remains In Effect Into This Evening; Continued Cold This Week (Updated 4 PM 12/11)

A Winter Storm Warning remains in effect into the evening across southern Wisconsin. Snow continues to affect southern and central Wisconsin.

Accumulating snow will continue through the late morning and early afternoon, before tapering off slowly from west to east during the afternoon and early evening.

Widespread snowfall of 4 to 8 inches has been reported as of this evening as depicted by the below graphic.  Isolated locations reported higher amounts just above 8 inches.

Additional snowfall of 1 to 3 inches is expected today, pushing snowfall totals to the 5 to 9 inch range across south central and southeast Wisconsin.  The snow will be dry and powdery.  West winds gusting to 20 to 25 mph later tonight into early Monday will cause patchy blowing snow.  

Submit a snowfall report here.
View snowfall reports here, and view a graphic here.
Click here for road conditions across Wisconsin (via Wisconsin DOT)
Click here for more winter weather information.

Here are the latest local and regional radar loops:
 

Local Radar	Regional Radar - West View	Regional Radar - East View

Here is a map with the latest winter weather headlines:
  

Snow Timing:

Snow will continue across central and southern Wisconsin into early to mid evening. It will end by later tonight. Here is a depiction of when the snow should end this evening:

Weather Story
6 PM This Evening	6 AM Monday Morning

Click here for an hour-by-hour snowfall forecast at several locations in southern Wisconsin!

Below are the additional snowfall amounts through tonight:

In a new experiment, we have begun to attempt to show uncertainty regarding expected additional snowfall amounts.  

Think of this like goalposts in football; the snowfall totals will be somewhere between the best and worse case scenarios, and most likely will be in line with our official forecast:

This is the best case scenario. We are confident that snowfall totals will not be less than this.	Our official forecast. This is the most likely scenario. Most signs point to snow accumulations near what is shown here.	This is the worst case scenario. We are confident that snowfall totals will not be more than this.

Cold Next Week:

After the weekend system departs, there are indications that even colder air will arrive through the middle of the week. The dark blue indicates high probabilities of below normal temperatures. Average highs during this time period are 30 degrees, while average lows are around 18 degrees.

Below are the 6-10 day and the 8-14 temperature outlooks from the Climate Prediction Center:

Right now, models are in remarkably good agreement with the very cold temperatures, considering this is several days out. The image below depicts surface temperatures early Wednesday morning next week, December 14th.

While these exact temperatures may not occur Tuesday night/Wednesday morning, the good model agreement does suggest that a significant arctic blast is likely this week.

DDV/Davis/Marquardt/BSH/SPM/Wood/Kavinsky
NWS Milwaukee/Sullivan, WI