Winter Storm Winding Down (Updated 2/7/13 11 PM)

Click here to see cool Dual-Pol imagery at the bottom of the story!

Snow reports so far (click for the interactive version):

Local storm report analysis as of 11 PM: 

Winter Storm Warnings and Winter Weather Advisories are in effect. See the map below for areal coverage of the winter headlines, and click here for specific details.

Graphical Overview

The map below shows the estimated ending time of the snow this evening.  

Here is a regional radar loop. Click for a bigger version:

Snowfall totals will range from around 2 west of Madison to nearly 9 inches down in Racine/Kenosha counties. Below are expected snowfall and liquid equivalent totals for the forecast area and all of Wisconsin. Click on each for a larger version:


Snowfall - Southern WI

Snowfall - All of WI

 srn wi snow  wi snow
Liquid Equivalent Precip
Southern WI
Liquid Equivalent Precip
All of WI
 srn wi liquid  

See our Winter Weather Summary Page for more information.


Here is how our new Dual Pol radar technology depicted the rapid change over to snow across parts of southeast and south central Wisconsin this morning. In the loop, the first image is about 9:09 AM, the second, 10:15 AM.  This is an image called Correlation Coefficient (CC).  It shows us where there is large and small diversity among precipitation targets that the radar is sensing.  A mixed precipitation area would have a large diversity of target sizes, thus a CC less than zero.  Note how the area north of the yellow line becomes more uniform, closer to zero, in about a 1 hour span between about 9 and 10 am this morning.  This is when the transition to snow, low diversity targets (all targets about the same size), occurred.  Finally, the last image is what CC looks like once the entire area transitions over to one uniform type of precipitation...in this case snow.


Wood/DDV/MG/AFK/MB/ET
NWS Milwaukee/Sullivan, WI
 



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