Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
358 AM EDT Wed Oct 30 2019

Valid 12Z Wed Oct 30 2019 - 12Z Sat Nov 02 2019


Days 1-2...

...Central Plains to the Upper Great Lakes...
Models have moved into better agreement regarding the timing and
amplitude of a positively-tilted shortwave trough moving east from
the central Rockies into the Plains on Wednesday.  This system is
expected to produce mainly light snow amounts during the day from
the central High Plains across the Texas and Oklahoma Panhandle
region, Kansas and southern Nebraska - with WPC probabilities
indicating a less than 10 percent chance for accumulations of
4-inches or more.  The potential for some organized heavier
amounts is expected to increase farther east during the evening
into the overnight hours as the upper trough deepens, with some
models showing a closed center developing over the mid Mississippi
valley Tuesday morning.  Snowfall amounts have increased some from
northern Missouri to southern Wisconsin, with guidance suggesting
the potential for mesoscale banding producing some locally heavier
precipitation rates across the region.  WPC probabilities indicate
2-inches or are likely, with locally heavier amounts possible, by
early Thursday.  As the system continues to move east on Thursday,
additional snows are expected across northern Illinois and
southern Wisconsin while spreading northeast across lower
Michigan. 

The probability of significant icing is less than 10 percent.

Day 3...

The probability of significant icing and/or snow is less than 10
percent.

Pereira