THE WEATHER PREDICTION CENTER

COLLEGE PARK, MD


STORM SUMMARY MESSAGE



STORM SUMMARY NUMBER 09 FOR PACIFIC NORTHWEST AND NORTHERN
CALIFORNIA HEAVY RAINFALL
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
100 AM PST THU DEC 10 2015

...LIGHT TO MODERATE RAIN MOVING ACROSS NORTHERN CALIFORNIA AND
EASTERN OREGON... 

WINTER STORM WATCHES...WARNINGS...AND WINTER WEATHER ADVISORIES
ARE IN EFFECT FOR THE SIERRA NEVADA RANGE IN CALIFORNIA...THE
OREGON AND WASHINGTON CASCADES...AND THE HIGHER TERRAIN OF THE
INTERMOUNTAIN WEST.

FLOOD WATCHES...WARNINGS...AND FLOOD ADVISORIES ARE IN EFFECT FOR
PORTIONS OF THE PACIFIC NORTHWEST AS WELL AS PARTS OF NORTHERN
CALIFORNIA.

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

AT 1200 AM PST...A CLASSIC ATMOSPHERIC RIVER EVENT WAS ONGOING
ACROSS THE PACIFIC NORTHWEST WITH SUBTROPICAL MOISTURE STREAMING
INTO THE REGION COMBINED WITH A SERIES OF UPPER LEVEL
DISTURBANCES. AT THE SURFACE....THE NEXT FRONTAL SYSTEM WAS
APPROACHING THE WEST COAST...WHICH WAS ALSO AIDING IN USHERING
MOISTURE ACROSS THE PACIFIC NORTHWEST REGION. NATIONAL WEATHER
SERVICE DOPPLER RADARS AND SURFACE OBSERVATIONS SHOWED AN AREA OF
MODERATE TO HEAVY RAIN FALLING ACROSS NORTHERN CALIFORNIA AND THE
PACIFIC NORTHWEST. SCATTERED LIGHT RAIN...ALONG WITH SNOW IN
HIGHER ELEVATIONS...WAS ALSO FALLING ACROSS PORTIONS OF THE
INTERMOUNTAIN WEST. 

...SELECTED STORM TOTAL RAINFALL IN INCHES FROM 400 PM PST MON DEC
07 THROUGH 1200 AM PST WED DEC 10...

...CALIFORNIA...
CRESCENT CITY/MC NAMARA FIELD         1.95                    
ARCATA AIRPORT                        1.58                    
GUERNEVILLE 2 WSW                     1.36                    
CAZADERO - HUCKLEBERRY HEIGHT         1.25                    
VENADO 7 NNW                          1.20                    
MIDDLE PEAK RAWS                      1.14                    
MT. SAINT HELENA                      1.06                    
OCCIDENTAL                            1.05                    

...IDAHO...
BEAR MOUNTAIN                         6.70                    
SCHWEITZER BASIN                      5.20                    
COOL CREEK                            4.20                    
HIDDEN LAKE                           4.10                    
MULLAN PASS                           4.02                    
LOOKOUT                               3.50                    
COLBURN 2 ESE                         3.01                    
SHANGHI SUMMIT                        2.80                    
CRATER MEADOWS                        2.50                    
HEMLOCK BUTTE                         1.80                    
PIERCE                                1.73                    
LOLO PASS                             1.70                    
LOWMAN 9.6 ENE                        1.57                    
GARDEN VALLEY 2.7 NW                  1.56                    
OROFINO 3 NE                          1.16                    

...MONTANA...
HOODOO BASIN                          4.30                    
FLATTOP MTN                           4.20                    
TWIN LAKES                            3.70                    
TWELVEMILE CREEK                      2.50                    
NOISY BASIN                           1.90                    

...OREGON...
SADDLE MOUNTAIN                       5.90                    
SOUTH FORK                            5.90                    
ASTORIA AIRPORT                       5.47                    
RED HILL                              5.40                    
SUMMIT                                5.30                    
RYE MOUNTAIN                          5.09                    
LOG CREEK                             4.90                    
BROOKINGS                             3.56                    
WFO PORTLAND ROOFTOP WEATHER          3.35                    
PORTLAND INTL AIRPORT                 3.22                    

...WASHINGTON...
STEVENS PASS                          5.70                    
TELMA 3 W                             5.47                    
SHELTON/SANDERSON FIELD ARPT          4.89                    
HUCKLEBERRY RIDGE                     4.31                    
JUNE LAKE                             4.30                    
SHEEP CANYON                          4.20                    
TRINITY SNOTEL                        4.20                    
GLENOMA                               4.04                    
OLYMPIA                               3.77                    
POTLATCH 2 N                          3.75                    
PARK CREEK RIDGE                      3.70                    
SWIFT CREEK                           3.60                    
HOQUIAM/BOWERMAN AIRPORT              3.53                    
ROCK CREEK                            3.47                    
ABERNATHY MTN                         3.39                    
SEATTLE/TACOMA INTL ARPT              3.33                    

...SELECTED STORM TOTAL SNOWFALL IN INCHES FROM 400 PM PST MON DEC
07 THROUGH 1200 AM PST WED DEC 10...

...IDAHO...
KETCHUM 22 NW                        15.2                    
ISLAND PARK 8 NW                     13.2                    
STANLEY 16 NW                        10.4                    
FAIRFIELD 10 NNW                      8.3                    
HAILEY 21 ENE                         7.1                    
ATLANTA 12 NW                         6.8                    
BURLEY 18 SE                          5.8                    
ARCO 33 WNW                           4.6                    
MACKAY 32 NE                          4.1                    
CHALLIS 27 NNE                        3.2                    
LAVA HOT SPRINGS 10 SSE               2.4                    
PRESTON 20 NE                         2.3                    

...MONTANA...
ISLAND PARK 16 NE                    19.8                    
WEST YELLOWSTONE 6 S                 10.4                    

...WASHINGTON...
WINTHROP 6.8 NNW                      3.7                    

...WYOMING...
DRIGGS 32 NNE                        11.3                    
PINEDALE 25.9 NNW                     5.5                    

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

...COLORADO...
BERTHOUD PASS                         84                    
GOLD HILL 2 S                         82                    

...IDAHO...
COLBURN 5 W                           66                    
HUETTER 2 NNE                         52                    

...MONTANA...
EAST GLACIER PARK 8 SE                85                    
BYNUM 13 W                            82                    
LIVINGSTON 6 ENE                      77                    
CASCADE                               76                    
FORT BENTON 8 SSW                     72                    
BURGESS JUNCTION 1 NW                 71                    
BOZEMAN 11 E                          70                    
DEVON 7 NW                            68                    
RED LODGE 6 WSW                       67                    
MCALLISTER 5 NNE                      63                    
FORT BELKNAP 13 S                     62                    
CUT BANK SIRPORT                      58                    
GREYCLIFF 13 SSW                      58                    

...OREGON...
MOUNT HOOD 1 SE                      125                    
MARYS PEAK                            97                    
PHILOATH 15 WSW                       94                    
OCEANSIDE                             88                    
HEBO 4 E                              85                    
FLORENCE 13 N                         80                    
DALLAS 10 WSW                         79                    
SEA LION CAVES                        75                    
PACIFIC CITY                          71                    
TIDEWATER                             69                    
YACHATS                               63                    
LINCOLN BEACH 1 N                     61                    
RIDGEFIELD 3 SSW                      61                    
WALDPORT                              60                    
NEWPORT 2 S                           59                    

...WASHINGTON...
MISSION RIDGE SKI AREA               100                    
NORTH BONNEVILLE 10 NW                92                    
CASTLE ROCK 15 WNW                    83                    
NASELLE 3 NNE                         74                    
COLBURN 5 W                           73                    
COOK 2 WNW                            73                    
THORNTON 3 SW                         63                    
FERNDALE                              62                    
MEGLER 1 NW                           59                    

...WYOMING...
SUNLIGHT BASIN 8 E                    96                    
CLARK 5 WNW                           86                    
BUFORD 7 NE                           83                    
CHEYENNE 10 WSW                       75                    
WHEATLAND 9 S                         71                    
WHITAKER                              67                    
ARLINGTON 7 ESE                       66                    
ELK MOUNTAIN 7 NW                     60                    
GLENROCK 2 SSE                        60                    


A SERIES OF UPPER LEVEL DISTURBANCES WILL MOVE ACROSS THE PACIFIC
NORTHWEST AND THE INTERMOUNTAIN WEST OVER THE NEXT FEW DAYS AS
MOISTURE CONTINUES TO FEED INTO THE REGION. THE HEAVIEST AXIS OF
RAIN WILL CONCENTRATE OVER NORTHWEST CALIFORNIA THROUGH FRIDAY.
RAINFALL AMOUNTS RANGING FROM 2 TO 4 INCHES OF RAIN...WITH LOCALLY
HIGHER AMOUNTS...MAY BE POSSIBLE ACROSS NORTHWEST COASTAL
CALIFORNIA AND SOUTHWEST OREGON. RAIN WILL ALSO CONTINUE TO FALL
ACROSS THE PACIFIC NORTHWEST WHERE ANOTHER 2 TO 5 INCHES OF RAIN
MAY BE POSSIBLE THROUGH THE REST OF THE WEEK...ESPECIALLY IN AREAS
WITH FAVORABLE UPSLOPE. ALL OF THIS HEAVY RAINFALL COULD LEAD TO
SIGNIFICANT FLOODING ALONG MUCH OF THE NORTHWEST COAST. IN
ADDITION TO THE RAINFALL...HEAVY SNOWFALL CAN BE EXPECTED ACROSS
THE NORTHERN WASHINGTON CASCADES...THE HIGHER ELEVATIONS OF THE
NORTHERN INTERMOUNTAIN WEST...AS WELL AS THE SIERRA NEVADA RANGE
OF CALIFORNIA. 

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: 341 AM EST THU DEC 10 2015