STORM SUMMARY NUMBER 8 FOR WESTERN U.S. HEAVY PRECIPITATION EVENT
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
700 AM PST WED JAN 20 2010
 
...SUCCESSION OF PACIFIC SYSTEMS TO CONTINUE INUNDATING THE WEST
COAST FOR A FEW MORE DAYS...
 
WINTER STORM WARNINGS ARE IN EFFECT FOR THE HIGHER ELEVATIONS OF
CALIFORNIA INCLUDING THE SIERRA MOUNTAIN RANGE...AND ALSO FOR THE
HIGHER ELEVATIONS OF THE FOUR CORNERS STATES. A BLIZZARD WATCH HAS
BEEN ISSUED FOR ELEVATIONS ABOVE 7000 FEET IN SOUTHEASTERN ARIZONA
FOR THURSDAY.
 
FLASH FLOOD WATCHES AND COASTAL FLOOD ADVISORIES ARE IN EFFECT FOR
COASTAL AREAS OF SOUTHERN CALIFORNIA. FLOOD WATCHES ARE IN EFFECT
FOR AREAS NEAR THE COLORADO RIVER IN NEVADA... CALIFORNIA...AND
ARIZONA.
 
HIGH WIND WATCHES AND WARNINGS ARE IN EFFECT FOR MOST OF THE
OREGON COAST AS WELL AS MUCH OF CENTRAL CALIFORNIA INCLUDING SOME
OF THE COASTAL AREAS IN SOUTHERN CALIFORNIA.
 
FOR A DETAILED GRAPHICAL DEPICTION OF THE LATEST
WATCHES...WARNINGS AND ADVISORIES...PLEASE SEE WWW.WEATHER.GOV

AT 700 AM PST...A COLD FRONT THAT MOVED INTO CALIFORNIA SPAWNING
SEVERAL WATERSPOUTS AND TORNADOES ON TUESDAY HAS DISSIPATED OVER
THE GREAT BASIN. A NEW SURFACE LOW FORMED OVER ARIZONA AND WAS
MOVING NORTHEASTWARD THROUGH SOUTHERN UTAH. THE NEXT STORM
SYSTEM...WITH A 976 MB PRESSURE...HEADED TOWARD CALIFORNIA...WAS
LOCATED A FEW HUNDRED MILES WEST OF THE NORTHERN CALIFORNIA COAST.
NATIONAL WEATHER SERVICE DOPPLER RADARS AND SURFACE OBSERVATIONS
INDICATED ANOTHER ROUND OF WIDESPREAD MODERATE TO HEAVY RAIN WITH
HIGH ELEVATION SNOW OVER MOST OF WESTERN CALIFORNIA...AND MOVING
STEADILY INLAND. LIGHT TO MODERATE RAIN AND HIGHER ELEVATION SNOW
WAS OBSERVED OVER CENTRAL NEW MEXICO AND WESTERN COLORADO.

...SELECTED STORM TOTAL SNOWFALL IN INCHES FROM 700 AM PST SUN JAN
17 THROUGH 700 AM PST TUE JAN 20...

...ARIZONA...
SUNRISE MOUNTAIN                     22.0                     
BELLEMONT                            19.0                     
FLAGSTAFF                            17.4                     
MOUNTAINAIRE                         11.0                     
WILLIAMS                              7.0                     

...CALIFORNIA...
KIRKWOOD                             34.0                     
BOREAL                               30.0                     
SODA SPRINGS                         30.0                     
WHITE WOLF                           20.0                     
KINGVALE                             19.0                     
SUGAR BOWL                           19.0                     
MAMMOTH LAKES                        12.0                     
ASPENDELL                            11.0                     
CISCO 5 ENE                           7.0                     
ALPINE MEADOWS 3 ENE                  6.0                     

...NEVADA...
JARBIDGE 9 E                         13.0                     
POLE CREEK R.S.                      13.0                     
GILLMAN SPRINGS 6 WNW                11.0                     
INCLINE VILLAGE 1 NE                 10.0                     
LAMOILLE 9 SE                        10.0                     
MT. CHARLESTON                       10.0                     
DAGGET PASS                           9.0                     
GARDNERVILLE 5 WSW                    4.3                     
CARSON CITY                           3.0                     

...SELECTED STORM TOTAL RAINFALL IN INCHES FROM 700 AM PST SUN JAN
17 THROUGH 700 AM PST TUE JAN 20...

...ARIZONA...
LUKE AFB/PHOENIX                      1.56                     
PHOENIX-DEER VALLEY MUNI ARPT         1.40                     
KINGMAN AIRPORT                       1.28                     
GILBERT 3.8 NW                        0.82                     

...CALIFORNIA...
CRESTLINE 0.2 WSW                     6.70                     
PETROLIA 7.4 SE                       6.24                     
CLOVERDALE 0.8 SSE                    5.70                     
HEALDSBURG 3.7 WNW                    5.34                     
OLD MAN MOUNTAIN                      5.00                     
OPIDS CAMP                            4.99                     
WHITE LEDGE PEAK                      4.73                     
MATILIJA DAM                          4.66                     
ROSE VALLEY                           4.33                     
UKIAH MUNI ARPT                       4.12                     
NORDHOFF RIDGE                        4.05                     
W FK HELIPORT                         4.01                     
CHILAO                                3.74                     
NORTH FORK MATILIJA                   3.70                     
MOUNT SHASTA                          3.65                     
SANTA ANA/JOHN WAYNE ARPT             2.74                     
BURBANK-GLENDALE-PASADENA ARPT        2.72                     
SAN FRANCISCO INTL ARPT               2.26                     
LOS ANGELES-USC                       2.04                     

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

...CALIFORNIA...
WARD MOUNTAIN                          104 ALONG SIERRA CREST  
VIRGINIA PEAK                           66                     

...OREGON...
CAPE BLANCO                             87                     
FLYNN PRAIRIE                           78                     
SQUAW PEAK                              75                     


PRECIPITATION WILL BE ON THE INCREASE THROUGH TODAY AS ANOTHER
STRONG PACIFIC STORM APPROACHES THE CALIFORNIA COAST. BY THE END
OF THE WEEK...WIDESPREAD STORM RAINFALL TOTALS OF 4 TO 8 INCHES
ARE EXPECTED ACROSS CALIFORNIA AND INTO ARIZONA...WITH LOCAL
AMOUNTS OF UP TO 12 INCHES POSSIBLE ALONG THE SOUTHERN CALIFORNIA
COASTAL RANGES AND MOGOLLON RIM OF ARIZONA. THIS WILL BE ENOUGH TO
CAUSE SIGNIFICANT FLOODING ISSUES IN SOME AREAS. SNOWFALL TOTALS
COULD BE IN EXCESS OF 5 FEET ALONG THE SIERRA NEVADA
MOUNTAINS...ALONG WITH BLIZZARD CONDITIONS AT TIMES. STRONG AND
GUSTY WINDS WILL AGAIN IMPACT CALIFORNIA AND COASTAL OREGON AS THE
STORM SYSTEMS MOVE ASHORE...WITH THE HIGHEST WINDS LIKELY OVER THE
CRESTS OF MOUNTAIN RANGES.

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.

HAMRICK