THE WEATHER PREDICTION CENTER

COLLEGE PARK, MD


STORM SUMMARY MESSAGE



STORM SUMMARY NUMBER 01 FOR WESTERN U.S. WINTER STORM
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
700 AM PST SUN DEC 13 2015

...HEAVY RAIN AND SNOW IMPACTING THE PACIFIC NORTHWEST...

WIND ADVISORIES ARE IN EFFECT FOR MUCH OF COASTAL WESTERN U.S. AND
THE INTERMOUNTAIN WEST

WINTER STORM WATCHES...WARNINGS...AND WINTER WEATHER ADVISORIES
ARE IN EFFECT FOR A LARGE PORTION OF THE WESTERN U.S.

FOR A DETAILED GRAPHICAL DEPICTION OF THE LATEST
WATCHES...WARNINGS AND ADVISORIES...PLEASE SEE WWW.WEATHER.GOV

AT 600 AM PST...A PLUME OF PACIFIC MOISTURE WAS COMING ASHORE IN
THE PACIFIC NORTHWEST. A LOW PRESSURE CENTER WITH A CENTRAL
PRESSURE OF 988 MB...29.18 INCHES...WAS LOCATED ABOUT 60 MILES
NORTHWEST OF VANCOUVER...BRITISH COLUMBIA. AN OCCLUDED BOUNDARY
STRETCHES INTO CENTRAL BRITISH COLUMBIA AND A COLD FRONT IS
PUSHING THROUGH WESTERN WASHINGTON...CENTRAL OREGON...AND NORTHERN
CALIFORNIA. NATIONAL WEATHER SERVICE RADAR AND SURFACE
OBSERVATIONS SHOWED HEAVY RAINFALL IMPACTING NORTHERN
CALIFORNIA...WESTERN WASHINGTON...AND WESTERN OREGON WITH SNOW IN
THE HIGHER ELEVATIONS. AHEAD OF THE FRONT...LIGHT RAIN AND SNOW
WAS OBSERVERED ACROSS IDAHO...WESTERN MONTANA...AND EASTERN OREGON.

...SELECTED STORM TOTAL SNOWFALL IN INCHES FROM 600 AM PST SAT DEC
12 THROUGH 600 AM PST SUN DEC 13...

...OREGON...
APPLEGATE 3 NE                        8.0                    
KLAMATH FALLS 2 N                     8.0                    
FLORA 1.0 SE                          7.0                    
SUNRIVER 10 S                         6.0                    
BUTTE FALLS 4.5 NNW                   4.0                    
PROSPECT 7 SW                         4.0                    

...SELECTED STORM TOTAL RAINFALL IN INCHES FROM 600 AM PST SAT DEC
12 THROUGH 600 AM PST SUN DEC 13...

...CALIFORNIA...
CRESCENT CITY 7.8 NNE                 6.93                    
FORT DICK 0.2 SSW                     6.20                    
SMITH RIVER 1.1 SSE                   5.41                    
CRESCENT CITY/MC NAMARA FIELD         4.61                    
TRINIDAD 1.0 ENE                      4.24                    
MCKINLEYVILLE 2.3 NE                  3.19                    
PETROLIA 7.4 SE                       2.31                    
EUREKA 1.2 E                          2.05                    
YREKA 1 WNW                           1.54                    

...OREGON...
BROOKINGS 4.2 ENE                     8.16                    
O'BRIEN 2 SW                          4.54                    
GOLD BEACH                            4.47                    
WILDERVILLE 2.4 WSW                   4.09                    
GRANTS PASS 9.5 W                     3.90                    
BANDON 11.4 S                         3.46                    
SEXTON SUMMIT                         3.01                    
LANGLOIS 1 NNE                        2.67                    

...WASHINGTON...
HOODSPORT 3.7 WNW                     2.39                    
QUINAULT 2.2 NE                       2.05                    
BRINNON 1.7 WSW                       1.94                    
OLYMPIA 7.3 WSW                       1.58                    
SHELTON/SANDERSON FIELD ARPT          1.26                    
PORT ANGELES 9.3 SSW                  1.18                    
QUILLAYUTE                            1.00                    

...SELECTED PEAK WIND GUSTS IN MILES PER HOUR EARLIER IN THE
EVENT...

...MONTANA...
LIVINGSTON 2 WSW                      61                    

...OREGON...
TILLAMOOK 4 W                         69                    
FLORENCE 1 NW                         66                    

...WASHINGTON...
ASTORIA 13 NW                         65                    


THE SURFACE FRONT WILL PUSH THROUGH THE INTERMOUNTAIN WEST TODAY
WITH PRECIPITATION OVERSPREADING MUCH OF THE REGION. WITH STRONG
ONSHORE FLOW...HEAVY RAINFALL WILL CONTINUE ALONG THE WEST COAST
FROM CENTRAL CALIFORNIA NORTHWARD TO WASHINGTON. RAINFALL OF 1 TO
3 INCHES IS EXPECTED WITH LOCALLY HIGHER AMOUNTS POSSIBLE TODAY.
RAINFALL WILL TAPER OFF TOMORROW AS THE STORM MOVES INLAND AND THE
ONSHORE FLOW WEAKENS. A DEEP UPPER LEVEL TROUGH WILL OVERSPREAD
THE WESTERN U.S. BEHIND THE SURFACE COLD FRONT LEADING TO LOWERING
SNOW LEVELS. HEAVY SNOW WILL IMPACT THE HIGHER ELEVATIONS OF THE
CASCADES AND SIERRA NEVADA RANGES TODAY WITH SNOWFALL OF 1 TO 2
FEET EXPECTED. SNOW WILL SPREAD TO THE GREAT BASIN AND NORTHERN
ROCKIES TODAY AND TOMORROW...AND TO THE CENTRAL ROCKIES AND
NORTHERN PLAINS TOMORROW AND TUESDAY. SNOWFALL OF OVER A FOOT IS
LIKELY ACROSS THE HIGHER ELEVATIONS OF THE NORTHERN/CENTRAL
ROCKIES AND GREAT BASIN WITH LIGHTER AMOUNTS IN THE VALLEYS. 

THE NEXT STORM SUMMARY WILL BE ISSUED BY THE WEATHER PREDICTION
CENTER AT 100 PM PST. PLEASE REFER TO YOUR LOCAL NATIONAL WEATHER
SERVICE OFFICE FOR ADDITIONAL INFORMATION ON THIS EVENT.

KREKELER




Last Updated: 1129 AM EST SUN DEC 13 2015