THE HYDROMETEOROLOGICAL PREDICTION CENTER

CAMP SPRINGS, MD


STORM SUMMARY MESSAGE



STORM SUMMARY NUMBER 9 FOR WESTERN U.S. HEAVY PRECIPITATION EVENT
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
700 PM PST MON DEC 20 2010
 
...MAJOR HEAVY RAIN AND MOUNTAIN SNOW EVENT CONTINUES FOR THE
WESTERN U.S. AS A SERIES OF MOISTURE-LADEN PACIFIC STORMS MOVE
ASHORE...  
 
WINTER STORM WARNINGS AND WINTER WEATHER ADVISORIES REMAIN IN
EFFECT ACROSS THE MOUNTAINOUS AREAS OF CALIFORNIA AND SOUTHERN
OREGON.  THESE WARNING AND ADVISORIES ARE ALSO IN EFFECT FOR THE
HIGHER ELEVATIONS OF EASTERN NEVADA...CENTRAL UTAH...AND EXTENDING
EASTWARD TO THE FRONT RANGE OF THE COLORADO ROCKIES.
 
FLOOD AND FLASH FLOOD WATCHES...WARNINGS...AND ADVISORIES REMAIN
IN EFFECT FOR MANY OF THE LOWER ELEVATIONS OF CENTRAL AND SOUTHERN
CALIFORNIA...PARTS OF SOUTHERN NEVADA...SOUTHERN UTAH...AND
NORTHWEST ARIZONA.
 
FOR A DETAILED GRAPHICAL DEPICTION OF THE LATEST
WATCHES...WARNINGS AND ADVISORIES...PLEASE SEE WWW.WEATHER.GOV

AT 600 PM 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
INTO SOUTHERN NEVADA...SOUTHERN UTAH...AND NORTHERN ARIZONA. 
ISOLATED AREAS OF HEAVY SNOW WERE STILL NOTED OVER THE HIGHER
ELEVATIONS OF NORTHERN CALIFORNIA...OREGON...AND INTO WASHINGTON
STATE.          

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

...CALIFORNIA...
MAMMOTH LAKES 3 WSW                  108.0                     
NORTHSTAR                            98.0                     
MAMMOTH MOUNTAIN BASE                85.0                     
ASPENDELL 1 WNW                      74.0                     
JUNE MOUNTAIN                        69.0                     
ALPINE MEADOWS                       67.0                     
SQUAW VALLEY                         57.0                     
HOMEWOOD                             55.0                     
KIRKWOOD SKI AREA                    52.0                     
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                     

...COLORADO...
GOTHIC                               20.0                     
WOLF CREEK PASS 1 E                  18.0                     
LEADVILLE 13 NE                      10.0                     
MONARCH PASS 2 NE                    10.0                     

...IDAHO...
KETCHUM 22 NW                        22.0                     
PRESTON 20 NE                        18.5                     
HAILEY 20 ENE                        18.0                     
S ASHTON                              6.0                     

...NEVADA...
HEAVENLY VALLEY                      77.0                     
MOUNT ROSE                           65.0                     
MOUNT ROSE SKI AREA                  50.0                     
INCLINE VILLAGE 1 NE                 31.0                     
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...
SOLITUDE POWDERHORN                  42.0                     
BRIGHTON CREST                       33.0                     
ALTA 1 N                             29.0                     
PARK CITY JUNIPER PEAK               27.0                     
PROVO CANYON                         24.0                     
SNOWBASIN MID BOWL                   24.0                     
SPRINGDELL                           24.0                     
SNOWBIRD                             18.0                     
SYNDERVILLE 3 N                      13.0                     
RANDOLPH                             10.0                     
LIBERTY                               7.0                     
HEBER CITY                            6.5                     
EDEN                                  6.0                     
LAKETOWN                              6.0                     
SALINA                                6.0                     

...WASHINGTON...
CARSON                                7.0                     

...WYOMING...
NORTH SAND LAKE                      34.5                     
ROB ROY RESERVOIR 2 NE               33.6                     
BROOKLYN LAKE                        32.4                     
BATTLE LAKE 2 E                      31.2                     
NORTH FRENCH CREEK                   31.2                     
HOG PARK RESERVOIR 3 SW              27.0                     
BONDURANT                            16.7                     
JACKSON 9.3 NNW                      15.5                     
KEMMERER 36 N                        15.0                     
SPRING CREEK DIVIDE SNOTEL           15.0                     
E THAYNE                             14.3                     
BLIND BULL SUMMIT SNOTEL             14.0                     
COKEVILLE 15 NNE                     14.0                     
TRIPLE PEAK SNOTEL                   14.0                     
RYAN PARK 1 SSE                      13.5                     
AFTON 15 S                           12.0                     

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

...CALIFORNIA...
THREE PEAKS                          13.74                     
LAKE KAWEAH                          10.95                     
BEARTRAP MEADOW                      10.18                     
NATURE POINT                          9.72                     
MT UMUNHUM                            9.57                     
JERSEYDALE                            9.50                     
BEN LOMOND RAWS                       7.87                     
SAN LUIS OBISPO CO ARPT               7.65                     
BLUE CANYON                           7.64                     
GOAT MOUNTAIN                         7.40                     
SANTA MARIA                           6.74                     
BOULDER CREEK                         6.70                     
OAK CREEK                             6.32                     
SANTA MONICA                          5.80                     
LOS ANGELES-USC                       5.21                     
SAN FRANCISCO DOWNTOWN                2.20                     

...SELECTED PEAK WIND GUSTS IN MILES PER HOUR IN THE LAST SIX
HOURS...

...CALIFORNIA...
MAMMOTH CHAIR 1                        164                     
ALPINE MEADOWS SUMMIT                  155                     
VIRGINIA PEAK                          122                     
GARDNERVILLE                            92                     
LAKE TAHOE AIRPORT                      68                     
TRUCKEE-TAHOE                           63                     
BLUE CANYON                             55                     

...COLORADO...
WETMORE 5 ESE                           84                     
RED MOUNTAIN PASS 3 WSW                 83                     
COLORADO CITY 6 S                       74                     
COPPER MOUNTAIN                         73                     
FORT CARSON/BUTTS AAF                   59                     
AIR FORCE ACADEMY                       54                     
TELLURIDE RGNL ARPT                     51                     
PUEBLO RESERVOIR 3 N                    50                     

...IDAHO...
TWIN FALLS-SUN VALLEY RGNL              55                     

...NEVADA...
NWS RENO                                68                     
LOVELOCK/DERBY FIELD                    53                     
MERCURY/DESERT ROCK ARPT                52                     

...UTAH...
SUNDANCE ARROWHEAD                      78                     
ALTA                                    71                     
MONROE                                  68                     
ROSETTE                                 64                     
CHARLESTON                              63                     


A SERIES OF MOIST PACIFIC SYSTEMS WILL CONTINUE TO INUNDATE THE
WESTERN U.S. THROUGH THE MIDDLE OF THIS WEEK AS A PLUME OF DEEP
SUBTROPICAL MOISTURE CONTINUES TO STREAM INTO THE REGION FROM THE
TROPICS.  ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 INCHES...WITH
LOCALIZED AMOUNTS AS HIGH AS 4 INCHES OR MORE...CAN BE EXPECTED
THROUGH THURSDAY MORNING OVER NORTHERN CALIFORNIA...AND 3 TO 6
MORE INCHES OVER THE SOUTHERN HALF OF CALIFORNIA WITH ISOLATED
HIGHER AMOUNTS POSSIBLE.  SNOWFALL WILL CONTINUE TO BE MEASURED IN
FEET IN SOME OF THE HIGHER ELEVATIONS OF THE WESTERN
U.S...ESPECIALLY IN THE SIERRA NEVADA RANGE.  THE HEAVY SNOW
COMBINED WITH STRONG AND GUSTY WINDS WILL REDUCE VISIBILITIES AND
CREATE DANGEROUS TRAVEL CONDITIONS.  THE RAIN AND SNOW WILL
CONTINUE THROUGH THE MIDDLE OF THE WEEK.

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

HAMRICK




Last Updated: 955 PM EST MON DEC 20 2010