THE WEATHER PREDICTION CENTER
COLLEGE PARK, MD
STORM SUMMARY MESSAGE
STORM SUMMARY NUMBER 02 FOR PACIFIC NORTHWEST AND NORTHERN
INTERMOUNTAIN WEST HEAVY RAINFALL
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
700 AM PST TUE DEC 08 2015
...MODERATE RAINFALL MOVING ONSHORE ACROSS THE PACIFIC NORTHWEST
AND INTO THE INTERMOUNTAIN WEST...
FLOOD WATCHES...WARNINGS...AND FLOOD ADVISORIES ARE IN EFFECT FOR
PORTIONS OF THE PACIFIC NORTHWEST AS WELL AS PARTS OF NORTHWEST
COASTAL CALIFORNIA...NORTHERN IDAHO...AND WESTERN MONTANA.
WINTER STORM WATCHES ARE IN EFFECT FOR THE SIERRA NEVADA RANGE IN
CALIFORNIA.
HIGH WIND WATCHES...WARNINGS...AND WIND ADVISORIES ARE IN EFFECT
FOR PORTIONS OF THE NORTHWEST U.S....ESPECIALLY IN THE HIGHER
TERRAIN.
FOR A DETAILED GRAPHICAL DEPICTION OF THE LATEST
WATCHES...WARNINGS AND ADVISORIES...PLEASE SEE WWW.WEATHER.GOV
AT 600 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 DISTURBANCES IN THE
UPPER LEVELS. NATIONAL WEATHER SERVICE DOPPLER RADARS AND SURFACE
OBSERVATIONS SHOWED MODERATE RAIN MOVING INTO WESTERN WASHINGTON
AND NORTHWEST OREGON. LIGHT TO MODERATE RAIN OR SNOW WAS ALSO
FALLING ACROSS PORTIONS OF THE NORTHERN INTERMOUNTAIN WEST.
...SELECTED STORM TOTAL RAINFALL IN INCHES FROM 300 PM PST MON DEC
07 THROUGH 600 AM PST TUE DEC 08...
...IDAHO...
COOL CREEK 2.40
NOISY BASIN 1.90
HEMLOCK BUTTE 1.80
LOLO PASS 1.70
LOWMAN 9.6 ENE 1.57
GARDEN VALLEY 2.7 NW 1.56
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
WFO PORTLAND ROOFTOP WEATHER 3.35
PORTLAND INTL AIRPORT 3.22
...WASHINGTON...
BELFAIR 3.2 WSW 2.12
VANCOUVER 2.1 NW 1.96
RENTON 0.5 SSW 1.67
EASTGATE 1.7 SSW 1.60
OLYMPIA 3.2 SSW 1.59
TACOMA 3.1 NW 1.51
SHELTON/SANDERSON FIELD ARPT 1.50
SEATTLE/TACOMA INTL ARPT 1.02
...SELECTED STORM TOTAL SNOWFALL IN INCHES FROM 300 PM PST MON DEC
07 THROUGH 600 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 84
GOLD HILL 2 S 82
...MONTANA...
EAST GLACIER PARK 8 SE 73
MCALLISTER 5 NNE 63
GREYCLIFF 13 SSW 58
...OREGON...
PHILOATH 15 WSW 92
HEBO 4 E 85
FLORENCE 13 N 80
DALLAS 10 WSW 79
OCEANSIDE 75
MOUNT HOOD 2 SSE 73
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
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. RAINFALL AMOUNTS
RANGING FROM 6 TO 10 INCHES...WITH LOCALLY HIGHER AMOUNTS...CAN BE
EXPECTED FOR MUCH OF WESTERN WASHINGTON AND OREGON THROUGH
THURSDAY. THIS COULD LEAD TO SIGNIFICANT FLOODING ACROSS PARTS OF
THE REGION...ESPECIALLY ALONG FAVORABLE UPSLOPE AREAS. BY
WEDNESDAY EVENING AND INTO THURSDAY MORNING...THE MOISTURE PLUME
WILL SHIFT SOUTHWARD TOWARD THE NORTHERN CALIFORNIA COAST BRINGING
ANOTHER 8 TO 12 INCHES OF RAIN TO PORTIONS OF NORTHWEST COASTAL
CALIFORNIA. 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 100 PM PST. PLEASE REFER TO YOUR LOCAL NATIONAL WEATHER
SERVICE OFFICE FOR ADDITIONAL INFORMATION ON THIS EVENT.
SANTORELLI
Last Updated: 1000 AM EST TUE DEC 08 2015