Quantitative Precipitation Forecast
Issued by NWS

Home | Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13
000
FOUS11 KWBC 202040
QPFHSD

PROBABILISTIC HEAVY SNOW AND ICING DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
439 PM EDT TUE SEP 20 2016

VALID 00Z WED SEP 21 2016 - 00Z SAT SEP 24 2016

DAYS 1-3...


...NORTHERN/CENTRAL ROCKIES...

AN ANOMALOUS UPPER TROUGH AMPLIFYING AND CLOSING OFF OVER THE
WESTERN U.S. LATER THIS WEEK SHOULD LOWER TEMPERATURES ENOUGH TO
SUPPORT SNOW IN SOME OF THE HIGHER ELEVATIONS OF THE
NORTHERN/CENTRAL ROCKIES THURSDAY INTO FRIDAY.  THERE IS GENERALLY
GOOD AGREEMENT WITH THE LARGE SCALE EVOLUTION OF THE UPPER
TROUGH...BUT SMALLER SCALE DETAIL DIFFERENCES WITH IMPULSES OF
ENERGY EMBEDDED IN THE FLOW AND TIMING DIFFERENCES WITH THE
LEADING EDGE OF HEIGHT FALLS PROGRESSING EASTWARD INTO THE PLAINS
LATE IN THE PERIOD ARE CAUSING SOME UNCERTAINTY IN THE EXACT
SNOWFALL LOCATIONS AND ACCUMULATIONS.  THE LATEST SUITE OF MODEL
GUIDANCE SUGGEST THE GREATEST CHANCE FOR ACCUMULATING SNOW WILL BE
IN THE HIGHER PEAKS OF THE UINTA MOUNTAINS...SAWTOOTH
MOUNTAINS...AND ABSAROKA RANGE...BUT THE PROBABILITY OF SNOWFALL
GREATER THAN 8 INCHES IS CURRENTLY LESS THAN 10 PERCENT.

FOR INFORMATION ON THE HEAVY RAINFALL THREAT WITH THIS
SYSTEM...PLEASE REFER TO THE QPFPFD.


THE PROBABILITY OF SIGNIFICANT ICING IS LESS THAN 10 PERCENT.


GERHARDT


$$





USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.