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