FOUS11 KWBC 060804

QPFHSD



Probabilistic Heavy Snow and Icing Discussion

NWS Weather Prediction Center College Park MD

404 AM EDT Wed May 6 2026



Valid 12Z Wed May 06 2026 - 12Z Sat May 09 2026



...Southern Rockies and High Plains... 

Day 1...



...Significant Colorado snowstorm continues this morning before

shifting to southern Colorado this afternoon and dissipating this 

evening...



A multi-faceted positively-tilted trough is over the western U.S. A

southern stream shortwave trough will cross northern New Mexico

this morning, maintaining several more hours of mainly upslope lee-

side snow banding in the cold sector well behind a cold front and 

ahead of a 1022mb sfc high shifting south from eastern Montana. A 

northern stream reinforcing shortwave currently entering Utah will 

swing across southwest Colorado this morning and over northern New 

Mexico this afternoon which forces the precip focus to southern 

Colorado this afternoon before cutting off the easterly flow and

bringing a quick end to snowfall this evening.



Day 1 WPC probabilities of additional snowfall >4" after 12Z are 

50-90% from the Mosquito Range through the Sangre de Cristo Range 

with 30-50% probs on the Palmer Divide, Raton Mesa, and 40-80% on 

the San Juans. There are 30-50% probabilities for an additional >2"

for the southern and western Denver suburbs there the upslope

banding continues through about 16Z. 





The probability of significant icing across the CONUS is less than

10 percent. 







Today is the last regularly scheduled day of the season for the 

WPC Winter Weather Desk. Resumption for significant winter weather 

will occur as needed. Routine operations resume for the WWD in 

later September.







Jackson







$$