STORM SUMMARY NUMBER 2 FOR SOUTHERN CALIFORNIA HEAVY RAINFALL EVENT
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
100 PM PST FRI FEB 17 2017

...RAIN SHOWERS WITH LOCALLY HEAVY RAIN AND POTENTIAL FLASH
FLOODING ARE OCCURRING ACROSS CENTRAL AND SOUTHERN CALIFORNIA WITH
SNOW SHOWERS IN HIGHER ELEVATIONS OF THE SIERRA NEVADA AND
TRANSVERSE RANGES... 

FLASH FLOOD WATCHES...AND FLOOD WARNINGS AND ADVISORIES ARE IN
EFFECT ACROSS SOUTHERN CALIFORNIA.

WINTER STORM WARNINGS...WATCHES...AND WINTER WEATHER ADVISORIES
ARE IN EFFECT ACROSS THE SIERRA NEVADA RANGE OF
CALIFORNIA...TRANSVERSE RANGES IN SOUTHERN CALIFORNIA...AND HIGH
TERRAIN OF SOUTHERN NEVADA.

HIGH WIND WARNINGS...WATCHES...AND WIND ADVISORIES ARE IN EFFECT
ACROSS PORTIONS OF SOUTHERN CALIFORNIA...COLORADO RIVER BASIN OF
SOUTHERN NEVADA AND WESTERN ARIZONA.

FOR A DETAILED GRAPHICAL DEPICTION OF THE LATEST
WATCHES...WARNINGS AND ADVISORIES...PLEASE SEE WWW.WEATHER.GOV

AT 1200 PM PST...A DEEP UPPER TROUGH WAS LOCATED ALONG THE WEST
COAST AND WAS DIRECTING MOISTURE INTO SOUTHERN CALIFORNIA WITH THE
SURFACE LOW PRESSURE SYSTEM HAS A CENTRAL PRESSURE OF 983
MB...29.03 INCHES WAS LOCATED OFF THE CENTRAL CALIFORNIA COAST
NEAR 27.0N AND 125.3W. NATIONAL WEATHER SERVICE DOPPLER RADARS AND
SURFACE OBSERVATIONS INDICATED AND EXPANSIVE SHIELD OF MODERATE
WITH EMBEDDED SHOWERS WITH LOCALLY HEAVY RAIN COVERING MUCH OF
CALIFORNIA AS FAR SOUTH AS THE LOS ANGELES METRO AT THIS TIME.
PRECIPITATION CONTINUES INLAND WITH MODERATE TO HEAVY SNOWFALL
OCCURRING IN THE CENTRAL AND SOUTHERN SIERRA NEVADA RANGE AS WELL
AS STARTING IN THE TRANSVERSE RANGES OF SOUTHERN CALIFORNIA. 

...SELECTED STORM TOTAL RAINFALL IN INCHES FROM 100 AM PST FRI FEB
17 THROUGH 1200 PM PST FRI FEB 17...

...CALIFORNIA...
SAN MARCOS PASS                       5.60                    
ALISAL RESERVOIR                      5.05                    
CELITE                                4.93                    
LAKE CACHUMA                          4.55                    
EL DESEO RANCH                        4.42                    
GOLETA WATER DISTRICT                 4.03                    
SANTA BARBARA FLOOD CONTROL OFFICE    3.42                    
MINING RIDGE                          3.39                    
THREE PEAKS                           3.36                    
CASITAS                               3.06                    
SUMMERLAND                            3.01                    
TOPA TOPA                             2.96                    
ROCKY BUTTE                           2.76                    
DOUGH FLAT                            2.54                    
LOS OSOS NORTH LANDFILL               2.29                    
SANTA BARBARA 6.6 NW                  1.84                    
VENTURA CITY HALL                     1.62                    
CAL POLY SAN LUIS OBISPO              1.49                    
BIG SUR 3.2 SE                        1.40                    
KING CITY 13.2 S                      1.24                    
LOS OSOS 0.5 N                        1.16                    

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

...CALIFORNIA...
CARMEL VALLEY VILLAGE 10 SW           86                    
MILL CREEK                            81                    
BIG BEAR CITY 13 ESE                  78                    
CASTROVILLE 2 NW                      75                    
GRASS MOUNTAIN                        75                    
SALINAS AIRPORT                       71                    
SANDBERG                              70                    
CHILAO                                68                    
PT. PIEDRAS BLANCAS                   65                    
SANTA ROSA ISLAND                     65                    
BONEY MOUNTAIN                        63                    
LAKE PALMDALE                         63                    
TEPUSQUET                             63                    
TOPANGA                               62                    
HASTINGS                              61                    
HEARST CASTLE 40 W BUOY               60                    


AS THE UPPER LEVEL TROUGH MOVES EASTWARD...THE ASSOCIATED COLD
FRONT WILL ADVANCE TO THE WEST COAST REACHING SOUTHERN CALIFORNIA
LATER TODAY WITH INCREASING COVERAGE AND INTENSITY OF RAINFALL
CONTINUING A HIGH RISK OF EXCESSIVE RAINFALL WITH THE POSSIBILITY
OF AN ADDITIONAL 3 TO 6 INCHES POSSIBLE PARTICULARLY FOR COASTAL
SOUTHERN CALIFORNIA AND LOWER FLANKS OF SURROUNDING TRANSVERSE
MOUNTAIN RANGES. MODERATE TO HEAVY SNOW SHOWERS FOR THE TRANSVERSE
RANGES OF SOUTHERN CALIFORNIA WITH 4 TO 8 INCHES POSSIBLE AND IN
EXCESS OF ADDITIONAL FOOT TO 1.5 FEET OF SNOW POSSIBLE ACROSS THE
SOUTHERN PORTION OF THE SIERRA NEVADA RANGE. THROUGH SATURDAY THE
MAGNITUDE OF HEAVY RAINFALL WILL REDUCE AS THE COLD FRONT ADVANCES
ACROSS THE SOUTHEAST DESERTS OF CALIFORNIA INTO SOUTHERN NEVADA
AND WESTERN ARIZONA. NONETHELESS RAINFALL OF 1 TO 3 INCHES ACROSS
THE LOWER COLORADO RIVER BASIN INTO THE MOGOLLON RIM OF ARIZONA
WILL CONTINUE TO POSE EXCESSIVE RAINFALL THREAT. 

THE NEXT STORM SUMMARY WILL BE ISSUED BY THE WEATHER PREDICTION
CENTER AT 700 PM PST. PLEASE REFER TO YOUR LOCAL NATIONAL WEATHER
SERVICE OFFICE FOR ADDITIONAL INFORMATION ON THIS EVENT.

GALLINA