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 14 15
000
FOUS11 KWBC 190745
QPFHSD

PROBABILISTIC HEAVY SNOW AND ICING DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
245 AM EST THU JAN 19 2017

VALID 12Z THU JAN 19 2017 - 12Z SUN JAN 22 2017


DAYS 1 TO 3...

SNOWFALL ACROSS THE NORTHWEST/CALIFORNIA/INTERMOUNTAIN
WEST/SOUTHERN ROCKIES/SOUTHWEST...

THREE MOIST PACIFIC SYSTEMS WILL AGAIN AFFECT THE WESTERN US WITH
HIGH ELEVATION SNOW OVER THE NEXT 3 DAYS.  SYSTEM ONE IS MOVING
ASHORE TONIGHT AND WILL WORK ITS WAY ACROSS THE WESTERN STATES
THROUGH THURSDAY NIGHT AND FRIDAY MORNING WHILE SYSTEM NUMBER 2
APPROACHES THE WEST COAST AGAIN ON THURSDAY NIGHT AGAIN SPREADING
HEAVY SNOW ESPECIALLY ACROSS THE MOUNTAINS OF CALIFORNIA BEFORE
AFFECTING MUCH OF THE SOUTHWEST US ON DAY 2/FRIDAY INTO SATURDAY
MORNING.  SYSTEM NUMBER THREE APPROACHES THE WEST COAST ON
SATURDAY NIGHT INTO SUNDAY MORNING CONTINUING THE EXCESSIVE SNOW
AND RAIN MAKER THAT HAS BE DOMINANT THE PAST FEW WEEKS. HEAVIEST
SNOW WILL AGAIN PILE UP OVER THE SIERRA WHERE IN EXCESS OF 3 FEET
OF SNOW IS LIKELY OVER THE NEXT 3 DAYS.  SNOWFALL WILL ALSO BE
SIGNIFICANT ALTHOUGH NOT EXCESSIVE ACROSS THE CASCADES AND ALSO
ACROSS THE MOUNTAINS OF SOUTHERN CALIFORNIA WHERE HEAVY SNOW IS
LIKELY.  IT WILL ALSO OCCUR ACROSS THE INTERMOUNTAIN WEST OVER
PORTIONS OF NEVADA/UTAH/WESTERN COLORADO/CENTRAL AND NORTHERN
ARIZONA AND NEW MEXICO.  THE SUCCESSION OF 3 SEPARATE TROUGHS WILL
CAUSE SNOW LEVELS TO FLUCTUATE ACROSS THE REGION BUT EACH TROUGH
WILL BRING SNOW LEVELS DOWN TO VALLEY LOCATIONS.

SNOW LEVELS ACROSS THE SIERRA WILL START OUT AROUND 5000 TO 6000
FEET WITH SNOW LEVELS NEAR 4000 FEET ACROSS NORTHERN CALIFORNIA ON
THURSDAY MORNING AND WILL DROP OVERNIGHT TO AROUND 4000 FEET.
THEY WILL THEN RISE ON SATURDAY AGAIN TO BETWEEN 5000 AND 6000
FEET BEFORE DROPPING TO BELOW 4000 FEET BY SATURDAY MORNING.
ACROSS THE CENTRAL SIERRA...SNOW LEVELS CAN RISE TO BETWEEN 6000
AND 7000 FEET BY SUNDAY MORNING. ABOVE 7000 FEET...SNOWFALL
ACCUMULATIONS WILL BE QUITE HIGH ABOVE THE SNOW LEVEL.

KOCIN

$$





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