Preliminary snowfall totals from Sunday’s storm are in the 3-6″ range across the Minneapolis-St. Paul area. This storm has exited the region, but another storm will approach late tonight with another round of snow expected. However, there remains some uncertainty in tonight’s storm as the latest models have shifted the storm track farther east.
This shift would put Minneapolis right on the western edge of decent accumulations with the higher totals expected farther east in Wisconsin. While this leads to some uncertainty in totals, the likelihood of an accumulating snowfall event for the Twin Cities remains high overnight and into Tuesday.
The image below from the RAP model shows the projected surface level pattern for 2am Tuesday (image source: College of DuPage). We can see the low pressure center moving from SW to NE into Illinois with snow developing across Minneapolis, while the heavier snowfall is projected just a bit east.
Look for snow to fill into the MSP area late this evening with the prime time for snowfall from about midnight tonight through 3pm Tuesday. Snow will then taper off late Tuesday afternoon with dry conditions expected by Tuesday evening.
Total snowfall totals generally look to range from 2-5″ across the metro area, with snow accumulating all surfaces through the duration of the event and the highest impacts occurring during the Tuesday morning commute. Highest snowfall totals will likely favor eastern portions of the metro area. Temperatures will generally be in the low to mid 20s throughout the duration of this event.
Keep in mind that if the track of the low pressure system trends a little farther west, then higher snowfall amounts will be possible, while if trends continue to shift the low pressure system farther east, then it could result in lower snowfall amounts.
Winds will pick up during the day Tuesday, especially during the afternoon, from the NW at 10-20mph with higher gusts possible. As a result, areas of blowing and drifting snow are likely during the afternoon and evening, even once snowfall concludes. Winds should diminish by Wednesday morning, with skies becoming mostly sunny during the day Wednesday with highs in the teens.