THE HYDROMETEOROLOGICAL PREDICTION CENTER

CAMP SPRINGS, MD


STORM SUMMARY MESSAGE



STORM SUMMARY NUMBER 3 FOR WESTERN U.S. HEAVY PRECIPITATION EVENT
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
700 AM PST SUN DEC 19 2010
 
...MAJOR HEAVY RAIN AND MOUNTAIN SNOW EVENT NOW UNDERWAY FOR THE
WESTERN U.S. AS A SERIES OF MOISTURE-LADEN PACIFIC STORMS MOVE
ASHORE...
 
FLOOD AND FLASH FLOOD WATCHES...WARNINGS...AND ADVISORIES HAVE
BEEN ISSUED ACROSS CENTRAL AND NORTHERN CALIFORNIA AS WELL AS
PORTIONS OF WESTERN NEVADA AND SOUTHERN UTAH.
 
WINTER STORM WARNINGS AND WINTER WEATHER ADVISORIES ARE IN EFFECT
FOR MUCH OF OREGON...CENTRAL AND NORTHERN CALIFORNIA...NORTHERN
NEVADA...AND THE HIGHER ELEVATIONS OF THE NORTHERN AND CENTRAL
ROCKIES.
 
FOR A DETAILED GRAPHICAL DEPICTION OF THE LATEST
WATCHES...WARNINGS AND ADVISORIES...PLEASE SEE WWW.WEATHER.GOV

AT 600 AM PST...NATIONAL WEATHER SERVICE DOPPLER RADARS AND
SURFACE OBSERVATIONS INDICATED A WIDESPREAD AREA OF MODERATE TO
HEAVY RAIN OVER CENTRAL CALIFORNIA...WITH SNOW BEING REPORTED IN
THE HIGHER ELEVATIONS OF THE SIERRA NEVADA RANGES. 
ALSO...SCATTERED AREAS OF LIGHT TO MODERATE PRECIPITATION WERE
SPREADING EASTWARD ACROSS PORTIONS OF THE GREAT BASIN AND CENTRAL
ROCKIES.

...SELECTED STORM TOTAL SNOWFALL IN INCHES FROM 700 PM PST FRI DEC
17 THROUGH 700 AM PST SUN DEC 19...

...CALIFORNIA...
MAMMOTH LAKES 2 W                    37.0                     
BLACKCAP BASIN                       33.0                     
ALPINE MEADOWS                       30.0                     
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                     
TRUCKEE                              12.0                     

...COLORADO...
LEADVILLE 2 NE                        4.7                     

...IDAHO...
HAILEY                                7.0                     

...NEVADA...
MOUNT ROSE SKI AREA                  27.0                     
HEAVENLY VALLEY                      20.0                     
INCLINE VILLAGE 5 ENE                19.0                     
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                     

...WASHINGTON...
CARSON                                7.0                     

...WYOMING...
BATTLE LAKE 2 E                      16.5                     
NORTH FRENCH CREEK                   15.0                     
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 700 AM PST SUN DEC 19...

...A PORTION OR ALL OF THE PRECIPITATION AT SOME OF THESE SITES
MAY HAVE FALLEN AS SNOW...HOWEVER SNOWFALL MEASUREMENTS WERE NOT
AVAILABLE...
                  
...CALIFORNIA...
BEARTRAP MEADOW                      10.18                     
NATURE POINT                          9.72                     
WOFFORD HEIGHTS                       6.66                     
JERSEYDALE                            6.01                     
BLUE CANYON                           5.43                     
OXNARD AIRPORT                        4.04                     
SAN LUIS OBISPO CO ARPT               3.91                     
SANTA BARBARA MUNI ARPT               3.64                     
LOS GATOS 6.1 S                       3.41                     
SANTA MARIA PUBLIC APT                3.37                     
CAMARILLO AIRPORT                     3.08                     
SANTA MONICA MUNI ARPT                2.92                     
LOS ANGELES INTL ARPT                 2.78                     
VANDENBERG AFB/LOMPOC                 2.63                     
OAK CREEK                             2.49                     
HAWTHORNE MUNI ARPT                   2.48                     
VISALIA MUNI ARPT                     2.48                     
LINDSAY 0.5 N                         2.34                     
VAN NUYS AIRPORT                      2.09                     
LONG BEACH AIRPORT                    2.00                     

...OREGON...
SEXTON SUMMIT                         2.18                     

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

...CALIFORNIA...
LAKE TAHOE AIRPORT                      48                     
BLUE CANYON                             44                     
MATHER AFB/SACRAMENTO                   44                     
SANBERG                                 44                     
RED BLUFF MUNI ARPT                     43                     
SAN FRANCISCO INTL ARPT                 41                     

...IDAHO...
CALDWELL                                41                     

...NEVADA...
FALLON                                  41                     

...WYOMING...
RAWLINS MUNI ARPT                       40                     


A SERIES OF MOIST PACIFIC SYSTEMS WILL CONTINUE TO INUNDATE THE
WESTERN U.S. FOR THE REST OF THE WEEKEND AND EARLY INTO THIS WEEK
AS A PLUME OF DEEP SUBTROPICAL MOISTURE CONTINUES TO STREAM INTO
THE REGION. ADDITIONAL RAINFALL AMOUNTS OF THREE TO SIX
INCHES...WITH LOCALIZED AMOUNTS AS HIGH AS NINE INCHES...CAN BE
EXPECTED THROUGH WEDNESDAY MORNING. TOTAL SNOWFALL AMOUNTS OF 2 TO
4 FEET WILL BE POSSIBLE AT ELEVATIONS ABOVE 5000 FEET...WITH 6 TO
8 FEET OF SNOWFALL POSSIBLE AT ELEVATIONS ABOVE 7000 FEET. THE
HEAVIEST OF THE PRECIPITATION SHOULD BEGIN TO TAPER OFF BY LATE ON
MONDAY.

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

GERHARDT
5




Last Updated: 949 AM EST SUN DEC 19 2010