THE HYDROMETEOROLOGICAL PREDICTION CENTER

CAMP SPRINGS, MD


STORM SUMMARY MESSAGE



STORM SUMMARY NUMBER 6 FOR WESTERN U.S. HEAVY PRECIPITATION EVENT
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
100 AM PST MON DEC 20 2010
 
...MAJOR HEAVY RAIN AND MOUNTAIN SNOW EVENT CONTINUES FOR THE WEST
COAST AS A SERIES OF MOISTURE-LADEN PACIFIC STORMS MOVE ASHORE... 
     
 
WINTER STORM WARNINGS AND WINTER WEATHER ADVISORIES ARE IN EFFECT
FOR MUCH OF INTERIOR OREGON...THE MOUNTAINOUS AREAS OF CENTRAL AND
NORTHERN CALIFORNIA...AND EXTENDING INTO NORTHERN PORTIONS OF THE
INTER-MOUNTAIN WEST.
 
FLOOD AND FLASH FLOOD WATCHES AND WARNINGS ARE ALSO IN EFFECT FOR
PORTIONS OF SOUTHERN UTAH.
 
FLOOD AND FLASH FLOOD WATCHES...WARNINGS...AND ADVISORIES HAVE
BEEN ISSUED FOR MANY OF THE LOWER ELEVATIONS OF CENTRAL AND INTO
SOUTHERN CALIFORNIA...INCLUDING THE CENTRAL VALLEY.
 
FOR A DETAILED GRAPHICAL DEPICTION OF THE LATEST
WATCHES...WARNINGS AND ADVISORIES...PLEASE SEE WWW.WEATHER.GOV

AT 1200 AM PST...NATIONAL WEATHER SERVICE RADARS AND SURFACE
OBSERVATIONS INDICATED A WIDESPREAD AREA OF MODERATE TO HEAVY RAIN
OVER MUCH OF SOUTHERN CALIFORNIA. PATCHY AREAS OF MODERATE
PRECIPITATION WERE NOTED ALONG MOST OF THE U.S. WEST COAST AND
THROUGHOUT THE REST OF THE INTER-MOUNTAIN WEST. WIDESPREAD HEAVY
SNOW WAS REPORTED IN THE HIGHER ELEVATIONS OF THE SIERRA NEVADA
AND OTHER NEARBY MOUNTAIN RANGES...WITH BLIZZARD CONDITIONS ALONG
MOUNTAIN CRESTS.           

...SELECTED STORM TOTAL SNOWFALL IN INCHES FROM 700 PM PST FRI DEC
17 THROUGH 1200 AM PST MON DEC 20...

...CALIFORNIA...
MAMMOTH LAKES 3 WSW                  108.0                     
ALPINE MEADOWS                       53.0                     
KIRKWOOD SKI AREA                    52.0                     
ASPENDELL 1 WNW                      51.0                     
JUNE LAKE                            48.0                     
TRUCKEE 2 W                          42.0                     
BLACKCAP BASIN                       33.0                     
CHARLOTTE LAKE                       30.0                     
CHAGOOPA PLATEAU                     29.0                     
GREEN MOUNTAIN                       28.0                     
OSTRANDER LAKE                       27.0                     
AGNEW PASS                           26.0                     
TENAYA LAKE                          25.0                     
SQUAW VALLEY                         24.0                     

...COLORADO...
GOTHIC                               20.0                     
LEADVILLE 2 NE                        4.7                     

...IDAHO...
KETCHUM 22 NW                        22.0                     
PRESTON 20 NE                        18.5                     
HAILEY 20 ENE                        18.0                     
HAILEY                                7.0                     

...NEVADA...
MOUNT ROSE SKI AREA                  50.0                     
INCLINE VILLAGE 1 NE                 21.0                     
HEAVENLY VALLEY                      20.0                     
GARDNERVILLE 2 NW                    10.3                     
CARSON CITY 5 S                      10.0                     
VIRGINIA CITY 5 E                     8.0                     
RENO                                  5.0                     

...OREGON...
THREE RIVERS 1 N                     12.0                     
WSW CAMP SHERMAN                      9.0                     
HOOD RIVER                            8.0                     
SUNRIVER                              8.0                     
TIMBERLINE LODGE                      8.0                     
WILSON RIVER SUMMIT                   8.0                     
TUMALO 9 NW                           7.0                     
WILLAMEETTE PASS                      7.0                     

...UTAH...
PROVO CANYON                         24.0                     
BRIGHTON CREST                       22.0                     
SNOWBASIN MID BOWL                   19.0                     
ALTA                                 17.0                     
PARK CITY JUNIPER PEAK               17.0                     
PARK CITY JUPITER PEAK               17.0                     

...WASHINGTON...
CARSON                                7.0                     

...WYOMING...
BONDURANT                            16.7                     
BATTLE LAKE 2 E                      16.5                     
NORTH FRENCH CREEK                   15.0                     
SPRING CREEK DIVIDE SNOTEL           15.0                     
BLIND BULL SUMMIT SNOTEL             14.0                     
TRIPLE PEAK SNOTEL                   14.0                     
ROB ROY RESERVOIR 2 NE               13.5                     
RYAN PARK 1 SSE                      13.5                     
BROOKLYN LAKE                        12.0                     
SAND LAKE                            10.5                     
HOG PARK RESERVOIR 4 NW               9.6                     

...SELECTED STORM TOTAL RAINFALL IN INCHES FROM 700 PM PST FRI DEC
17 THROUGH 1200 AM PST MON DEC 20...

...ARIZONA...
BLACK ROCK                            1.33                     

...CALIFORNIA...
THREE PEAKS                          13.74                     
LAKE KAWEAH                          10.95                     
BEARTRAP MEADOW                      10.18                     
NATURE POINT                          9.72                     
MT UMUNHUM                            9.57                     
JERSEYDALE                            8.00                     
BEN LOMOND RAWS                       7.87                     
GOAT MOUNTAIN                         7.40                     
BLUE CANYON                           7.29                     
SAN LUIS OBISPO CO ARPT               6.79                     
BOULDER CREEK                         6.70                     
OAK CREEK                             6.32                     
LOMA PRIETA                           5.87                     
SANTA MARIA PUBLIC APT                5.06                     
OXNARD AIRPORT                        4.83                     
SANTA MONICA MUNI ARPT                4.10                     
SANTA BARBARA MUNI ARPT               3.64                     
LOS ANGELES INTL ARPT                 3.38                     
SAN FRANCISCO DOWNTOWN                2.20                     

...NEVADA...
MT CHARLESTON - RAINBOW CANYON        7.00                     
MOUNT ROSE SKI AREA                   3.90                     
GARDEN SPRING                         3.58                     

...OREGON...
SEXTON SUMMIT                         3.10                     

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

...CALIFORNIA...
MAMMOTH LAKES 4 W                      164                     
ALPINE MEADOWS 2 W                     155                     
ALPINE MEADOWS SUMMIT                  152                     
SOUTH LAKE TAHOE                        68                     
TRUCKEE                                 63                     
BLUE CANYON                             44                     
MATHER AFB/SACRAMENTO                   44                     
SANBERG                                 44                     
RED BLUFF MUNI ARPT                     43                     
SAN FRANCISCO INTL ARPT                 41                     

...COLORADO...
WALSENBURG 9 NNW                        64                     

...IDAHO...
TWIN FALLS                              61                     
CALDWELL                                41                     

...NEVADA...
VIRGINIA PEAK                          122                     
PYRAMID LAKE 1 W                        94                     
RUBY VALLEY                             69                     
GIBBS RANCH 10 WSW                      64                     
JIGGS 10 WNW                            63                     

...UTAH...
OGDEN PEAK                              77                     
SNOWBASIN - WILDCAT                     66                     
RED SPUR                                57                     
OTTER PEAK                              55                     


A SERIES OF MOIST PACIFIC SYSTEMS WILL CONTINUE TO INUNDATE THE
WESTERN U.S. INTO EARLY THIS WEEK AS A PLUME OF DEEP SUBTROPICAL
MOISTURE CONTINUES TO STREAM INTO THE REGION FROM THE TROPICS.
ADDITIONAL RAINFALL AMOUNTS OF 3 TO 5 INCHES...WITH LOCALIZED
AMOUNTS AS HIGH AS 6 INCHES OR MORE...CAN BE EXPECTED THROUGH
WEDNESDAY MORNING. TOTAL SNOWFALL AMOUNTS OF 2 TO 4 FEET WILL BE
POSSIBLE AT ELEVATIONS ABOVE 6000 FEET...WITH 4 TO 8 FEET OF
SNOWFALL POSSIBLE AT ELEVATIONS ABOVE 8000 FEET. RAIN AND SNOW
WILL CONTINUE ACROSS PORTIONS OF THE WEST THROUGH THE MIDDLE OF
THE WEEK...HOWEVER THE HEAVIEST PRECIPITATION FOR THE SIERRA
SHOULD BEGIN TO TAPER OFF BY EARLY TUESDAY MORNING.       

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

RYAN




Last Updated: 351 AM EST MON DEC 20 2010