THE WEATHER PREDICTION CENTER

COLLEGE PARK, MD


STORM SUMMARY MESSAGE



STORM SUMMARY NUMBER 1 FOR PACIFIC NORTHWEST AND NORTHERN
INTERMOUNTAIN WEST HEAVY RAINFALL
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
100 AM PST MON DEC 07 2015

...MODERATE RAINFALL MOVING ONSHORE ACROSS THE PACIFIC
NORTHWEST... 

WINTER STORM WATCHES AND WINTER WEATHER ADVISORIES ARE IN EFFECT
FOR THE HIGHER ELEVATIONS IN IDAHO...WESTERN
MONTANA...NORTHWESTERN WYOMING...AND THE SIERRA NEVADA MOUNTAIN
RANGE.

FLOOD WATCHES...WARNINGS...AND FLOOD ADVISORIES ARE IN EFFECT FOR
THE PACIFIC NORTHWEST...PORTIONS OF INTERIOR WASHINGTON AND
OREGON...IN ADDITION TO NORTHERN IDAHO AND WESTERN MONTANA.

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

AT 000 AM PST...A CLASSIC ATMOSPHERIC RIVER EVENT WAS ONGOING
ACROSS THE PACIFIC NORTHWEST AS SUBTROPICAL MOISTURE WAS STREAMING
ACROSS THE REGION ALONG WITH A SERIES OF UPPER LEVEL DISTURBANCES
MOVING EASTWARD. NATIONAL WEATHER SERVICE DOPPLER RADAR AND
OBSERVATIONS SHOWED MODERATE RAIN MOVING ACROSS COASTAL WASHINGTON
AND OREGON. IN ADDITION...LIGHT TO MODERATE RAINFALL WAS ALSO
BEING OBSERVED ACROSS EASTERN IDAHO...MONTANA...PORTIONS OF
WYOMING...AND NORTHERN UTAH. 

...SELECTED STORM TOTAL RAINFALL IN INCHES FROM 300 PM PST WED DEC
07 THROUGH 000 AM PST TUE DEC 08...

...IDAHO...
OROFINO 3 NE                          1.16                    

...OREGON...
LEES CAMP                             7.50                    
NORTH FORK                            6.20                    
SADDLE MOUNTAIN                       5.90                    
SOUTH FORK                            5.90                    
HEBO 4 ESE                            5.75                    
RED HILL                              5.40                    
RYE MOUNTAIN                          5.09                    
LITTLE MEADOWS                        5.00                    
CANNIBAL MOUNTAIN                     4.96                    
NEHALEM RIVER NR FOSS                 4.91                    
LOG CREEK                             4.90                    
SEINE CREEK                           4.80                    
BLAZED ALDER                          4.70                    
GREENPOINT                            4.50                    
HORSE CREEK                           4.25                    
WFO PORTLAND ROOFTOP WEATHER          3.35                    
PORTLAND INTL AIRPORT                 3.22                    

...SELECTED STORM TOTAL SNOWFALL IN INCHES FROM 300 PM PST WED DEC
07 THROUGH 000 AM PST TUE DEC 08...

...IDAHO...
KETCHUM 22 NW                        13.2                    
STANLEY 16 NW                         8.6                    
ATLANTA 12 NW                         6.8                    
ISLAND PARK 8 NW                      6.2                    
BURLEY 30 SW                          5.4                    
MACKAY 32 NE                          3.2                    
CHALLIS 27 NNE                        2.8                    
LAVA HOT SPRINGS 10 SSE               2.4                    
PRESTON 20 NE                         1.6                    

...MONTANA...
ISLAND PARK 16 NE                    14.5                    
WEST YELLOWSTONE 6 S                  9.1                    

...WYOMING...
DRIGGS 32 NNE                         9.0                    

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

...COLORADO...
BERTHOUD PASS                         77                    

...MONTANA...
GREYCLIFF 13 SSW                      58                    

...OREGON...
MOUNT HOOD                           141                    
PHILOATH 15 WSW                       92                    
HEBO 4 E                              85                    
DALLAS 10 WSW                         79                    
OCEANSIDE                             75                    
MOUNT HOOD 2 SSE                      73                    
FLORENCE 12 N                         69                    
TIDEWATER                             69                    
YACHATS                               63                    
LINCOLN BEACH 1 N                     61                    
PACIFIC CITY                          60                    
WALDPORT                              60                    
NEWPORT 2 S                           59                    
SOUTH BEACH                           59                    
SCHOLLS 3 WSW                         56                    

...WASHINGTON...
BONNEVILLE 10 N                       86                    
CASTLE ROCK 15 WNW                    83                    
COOK 2 WNW                            73                    

...WYOMING...
CHEYENNE 10 WSW                       75                    
WHEATLAND 9 S                         71                    
BUFORD 2 W                            70                    
WHITAKER                              67                    
ARLINGTON 7 ESE                       66                    
ELK MOUNTAIN 7 NW                     60                    
GLENROCK 2 SSE                        60                    


THE SERIES OF UPPER LEVEL DISTURBANCES WILL CONTINUE TO MOVE
ACROSS THE PACIFIC NORTHWEST AND THE INTERMOUNTAIN WEST OVER THE
NEXT FEW DAYS. RAINFALL AMOUNTS RANGING FROM 6 TO 9 INCHES...WITH
LOCALLY HIGHER AMOUNTS...CAN BE EXPECTED FOR WASHINGTON AND OREGON
THROUGH WEDNESDAY. THIS WILL LEAD TO SIGNIFICANT FLOODING ACROSS
MUCH OF THE REGION. BY WEDNESDAY EVENING AND INTO THURSDAY
MORNING...THE PLUME OF MOISTURE WILL SHIFT SOUTHWARD TOWARD THE
NORTHERN CALIFORNIA COAST. HEAVY SNOWFALL CAN BE EXPECTED ACROSS
THE NORTHERN WASHINGTON CASCADES THROUGH WEDNESDAY...IN ADDITION
TO THE TETON MOUNTAIN RANGE. 

THE NEXT STORM SUMMARY WILL BE ISSUED BY THE WEATHER PREDICTION
CENTER AT 700 AM PST. PLEASE REFER TO YOUR LOCAL NATIONAL WEATHER
SERVICE OFFICE FOR ADDITIONAL INFORMATION ON THIS EVENT.

FANNING




Last Updated: 332 AM EST TUE DEC 08 2015