THE HYDROMETEOROLOGICAL PREDICTION CENTER
CAMP SPRINGS, MD
STORM SUMMARY MESSAGE
STORM SUMMARY NUMBER 7 FOR WESTERN U.S. HEAVY PRECIPITATION EVENT
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
700 AM 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...
FLOOD AND FLASH FLOOD WATCHES...WARNINGS...AND ADVISORIES HAVE
BEEN ISSUED FOR MANY OF THE LOWER ELEVATIONS OF CENTRAL AND
SOUTHERN CALIFORNIA...AS WELL AS PORTIONS OF THE SOUTHWEST.
WINTER STORM WARNINGS AND WINTER WEATHER ADVISORIES REMAIN IN
EFFECT ACROSS THE MOUNTAINOUS AREAS OF CALIFORNIA AND SOUTHERN
OREGON. WINTER STORM WARNINGS AND WINTER WEATHER ADVISORIES ARE
ALSO IN EFFECT FOR THE HIGHER ELEVATIONS OF THE INTERMOUNTAIN WEST
AND 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 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. AREAS OF LIGHT TO
MODERATE SNOW WERE REPORTED IN SCATTERED AREAS OF THE HIGHER
ELEVATIONS ACROSS THE WESTERN U.S..
...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
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...
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...
ALTA 1 N 29.0
PROVO CANYON 24.0
SPRINGDELL 24.0
BRIGHTON CREST 22.0
SNOWBASIN 2 N 19.0
PARK CITY JUNIPER PEAK 17.0
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...
BONDURANT 16.7
BATTLE LAKE 2 E 16.5
JACKSON 9.3 NNW 15.5
KEMMERER 36 N 15.0
NORTH FRENCH CREEK 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
ROB ROY RESERVOIR 2 NE 13.5
RYAN PARK 1 SSE 13.5
AFTON 15 S 12.0
BROOKLYN LAKE 12.0
...SELECTED STORM TOTAL RAINFALL IN INCHES FROM 700 PM PST FRI DEC
17 THROUGH 1200 AM 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 8.00
BEN LOMOND RAWS 7.87
BLUE CANYON 7.54
GOAT MOUNTAIN 7.40
SAN LUIS OBISPO CO ARPT 6.93
BOULDER CREEK 6.70
OAK CREEK 6.32
LOS ANGELES-USC 4.29
SAN FRANCISCO DOWNTOWN 2.20
...SELECTED PEAK WIND GUSTS IN MILES PER HOUR EARLIER IN THE
EVENT...
...CALIFORNIA...
TRUCKEE-TAHOE 63
BLUE CANYON 55
LAKE TAHOE AIRPORT 55
...COLORADO...
WETMORE 5 ESE 84
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...
LOVELOCK/DERBY FIELD 53
MERCURY/DESERT ROCK ARPT 52
...UTAH...
ALTA 71
MONROE 68
ROSETTE 64
CHARLESTON 63
A SERIES OF MOIST PACIFIC SYSTEMS WILL CONTINUE TO INUNDATE THE
WESTERN U.S. THROUGH 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 THURSDAY MORNING. SNOWFALL WILL CONTINUE TO BE MEASURED
IN FEET IN SOME OF THE HIGHER ELEVATIONS OF THE WESTERN U.S.. THE
HEAVY SNOW COMBINED WITH STRONG AND GUSTING WINDS WILL REDUCE
VISIBILITIES AND CREATE HAZARDOUS TRAVEL CONDITIONS. THE RAIN AND
SNOW WILL CONTINUE 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 100 PM PST. PLEASE REFER TO YOUR LOCAL
NATIONAL WEATHER SERVICE OFFICE FOR ADDITIONAL INFORMATION ON THIS
EVENT.
GERHARDT
Last Updated: 950 AM EST MON DEC 20 2010