Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
348 AM EDT Thu May 09 2019

Valid 12Z Thu May 09 2019 - 12Z Sun May 12 2019



...Central Rockies...

Periods of snow will continue across portions of the central
Rockies into the weekend, with potentially heavy amounts,
especially early in the period, across portions of Colorado and
northern New Mexico.  Backing flow ahead of an elongating upper
trough over California-Nevada will direct a series of low
amplitude shortwaves across Colorado on Thursday.  In addition,
models show increasing divergence across Colorado along the right
entrance region of an upper jet amplifying over the central High
Plains.  However, snow levels are expected to increase on Thursday
which will help keep heavier amounts contained largely to areas
above 9000 ft in the Sawatch, San Juan and Sangre de Cristo ranges
- where WPC guidance is indicating a Slight Risk for additional
accumulations of a foot or more during the Day 1 period (ending
12Z Friday).  Snow showers are forecast to continue into early
Sunday, however the potential for additional heavy accumulations
is expected to diminish as the weekend progresses.

The probability of significant icing is less than 10 percent.

Pereira