STORM SUMMARY NUMBER 1 FOR SOUTHERN CALIFORNIA HEAVY RAINFALL EVENT
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
700 AM 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 600 AM PST...A DEEP UPPER TROUGH WAS LOCATED ALONG THE WEST
COAST AND WAS DIRECTING MOISTURE INTO SOUTHERN CALIFORNIA WITH THE
STRONGEST SURFACE LOW PRESSURE SYSTEM WITH A CENTRAL PRESSURE OF
994 MB...29.35 INCHES WAS LOCATED OFF THE CENTRAL CALIFORNIA COAST
NEAR 26.0N AND 128.9W.  NATIONAL WEATHER SERVICE DOPPLER RADARS
AND SURFACE OBSERVATIONS INDICATED AND EXPANSIVE SHIELD OF
MODERATE WITH EMBEDDED LOCALLY HEAVY RAIN SHOWERS COVERING MUCH OF
CALIFORNIA FROM THE CENTRAL SACRAMENTO VALLEY TO SOUTHERN LOS
ANGLES METRO AREA AND SURROUNDING MOUNTAIN RANGES. PRECIPITATION
CONTINUED INLAND TO THE SIERRA NEVADA RANGE CONVERTING TO MODERATE
TO HEAVY SNOW SHOWERS.

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

...CALIFORNIA...
CARMEL VALLEY VILLAGE 10 SW           74                    
SALINAS AIRPORT                       69                    
GRASS MOUNTAIN                        60                    
MILL CREEK                            60                    
SANDBERG                              54                    
TEPUSQUET                             54                    
SANTA ROSA ISLAND                     53                    
REYES PEAK 6 ENE                      52                    
CAMP NINE                             50                    


AS THE UPPER LEVEL TROUGH MOVES EASTWARD...THE ASSOCIATED COLD
FRONT WILL ADVANCE TO THE WEST COAST REACHING SOUTHERN CALIFORNIA
FRIDAY EVENING WITH INCREASING COVERAGE AND INTENSITY OF RAINFALL
LEADING TO A HIGH RISK OF EXCESSIVE RAINFALL WITH THE POSSIBILITY
OF 4 TO 8 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 2 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.

THIS WILL BE THE LAST STORM SUMMARY ISSUED BY THE WEATHER
PREDICTION CENTER FOR THIS EVENT. PLEASE REFER TO YOUR LOCAL
NATIONAL WEATHER SERVICE OFFICE FOR ADDITIONAL INFORMATION.

GALLINA