STORM SUMMARY NUMBER 5 FOR SOUTHERN CALIFORNIA AND ARIZONA HEAVY
RAINFALL EVENT
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
700 AM PST SAT FEB 18 2017

...DIMINISHING HEAVY RAIN AND SNOWS ACROSS CALIFORNIA AS THE DEEP
LOW SHIFTS EASTWARD TO IMPACT ARIZONA BRINGING EXCESSIVE RAINS TO
THE SOUTHWEST DESERTS AND SNOWS TO THE MOGOLLON RIM... 

FLASH FLOOD WATCHES...AND FLOOD WARNINGS AND ADVISORIES ARE ISSUED
FOR MUCH OF SOUTHERN CALIFORNIA...SOUTHEASTERN CALIFORNIA...AND
LOWER COLORADO RIVER VALLEY INTO CENTRAL ARIZONA.

WINTER STORM WARNINGS...WATCHES...AND WINTER WEATHER ADVISORIES
ARE IN EFFECT ACROSS THE SOUTHERN SIERRA NEVADA RANGE OF
CALIFORNIA...TRANSVERSE RANGES IN SOUTHERN CALIFORNIA...AND INTO
THE MOGOLLON RIM AND SOUTHEASTERN MOUNTAINS OF ARIZONA.

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

AT 600 AM PST...THE DEEP UPPER LEVEL TROF HAS ELONGATED NORTH TO
SOUTH WAS CROSSING CENTRAL AND EASTERN CALIFORNIA INTO NEVADA AND
WESTERN ARIZONA.   A FEW WEAK SURFACE LOW PRESSURE SYSTEMS REMAIN
NEAR THE NORTH SAN FRANCISCO BAY AS WELL AS NEAR THE CHANNEL
ISLANDS IN SOUTHERN CALIFORNIA.  THE MAIN SURFACE LOW HAS TRACKED
INTO THE LAKE TAHOE VICINITY WITH A CENTRAL PRESSURE OF 994
MB...29.35 INCHES AND CONTINUES TO DRIFT EASTWARD INTO THE GREAT
BASIN WITH A FRONTAL ZONE DRAPED SOUTHWARD INTO THE LOWER COLORADO
RIVER VALLEY.  NATIONAL WEATHER SERVICE DOPPLER RADARS AND SURFACE
OBSERVATIONS INDICATED THE MOST INTENSE RAIN SHOWERS EXTEND FROM
THE SEA OF CORTEZ NORTH THROUGH THE LAS VEGAS NEVADA METRO. 
ISOLATED TO SCATTERED BANDS OF LIGHT TO MODERATE SHOWERS LINGER
ACROSS CENTRAL AND SOUTHERN CALIFORNIA.  AT THE HIGHER
ELEVATIONS...PRECIPITATION WAS IN THE FORM OF SNOW ALONG THE
SIERRA NEVADA AS WELL AS THE TRANSVERSE RANGES REMAINS LIGHT AND
CONTINUES TO REDUCE WITH TIME.

...SELECTED STORM TOTAL RAINFALL IN INCHES FROM 1200 AM PST FRI
FEB 17 THROUGH 600 AM PST SAT FEB 18...

...CALIFORNIA...
EL DESEO RANCH                       10.28                    
MATILIJA CANYN UPPER                  9.36                    
CACHUMA LAKE                          9.19                    
GIBRALTAR DAM                         9.17                    
MONTECITO                             9.15                    
OLD AMN MOUNTAIN                      9.09                    
SAN MARCOS PASS                       9.06                    
SULPHUR MOUNTAIN CREEK                7.79                    
ALISAL RESERVOIR                      6.74                    
CELITE                                4.93                    
SANTA BARBARA MUNI ARPT               4.20                    
GOLETA WATER DISTRICT                 4.03                    
SANDBERG                              3.89                    
SANTA BARBARA CITY COLLEGE            3.73                    
SANTA BARBARA FLOOD CONTROL OFFICE    3.42                    
MINING RIDGE                          3.39                    
THREE PEAKS                           3.36                    
OXNARD AIRPORT                        3.26                    
VAN NUYS AIRPORT                      3.25                    
CAMARILLO AIRPORT                     2.78                    
LONG BEACH AIRPORT                    2.75                    
INDEPENDENCE 4 WNW                    2.34                    
VANDENBERG AFB/LOMPOC                 2.21                    
SANTA MARIA PUBLIC APT                2.17                    
LOS ANGELES DOWNTOWN                  2.11                    
SAN DIEGO                             1.09                    

...NEVADA...
BEATTY - TIMBER MTN                   1.69                    
GOLDFIELD 1 N                         1.53                    

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

...CALIFORNIA...
GRAPEVINE PEAK                       108                    
CARMEL VALLEY VILLAGE 10 SW           86                    
BIG BEAR CITY 13 ESE                  84                    
BURNS CANYON                          84                    
ACTON 9 SE                            82                    
MILL CREEK                            81                    
CHILAO                                80                    
MOUNT WILSON 8 NNE                    80                    
ALTADENA 6 N                          77                    
CLEAR CREEK                           77                    
TORO PEAK                             76                    
CASTROVILLE 2 NW                      75                    
GRASS MOUNTAIN                        75                    
LANCASTER 14 WSW                      75                    
PALOMAR MTN LOOKOUT                   75                    
PORT OF LOS ANGELES (PIER F)          75                    
SAN PEDRO 4 E                         75                    
HESPERIA 5 SW                         72                    
SAN CLEMENTE 5 E                      72                    
RUNNING SPRINGS 2 NW                  71                    
SALINAS AIRPORT                       71                    
AGUANGA 6 SSE                         70                    
PYRAMID LAKE 6 NE                     70                    
SANDBERG                              70                    


THE DEEP LOW PRESSURE WILL CONTINUE TO TRACK EASTWARD WITH GRADUAL
WEAKENING EXPECTED ACROSS THE GREAT BASIN OF NEVADA WITH THE
TRAILING FRONT SCRAPING ACROSS ARIZONA BRINGING MODERATE TO
OCCASIONALLY HEAVY RAINFALL.  THIS RAINFALL MAY REACH TOTALS OF 1
TO 2.5" AND HAS THE POTENTIAL TO LEAD TO FLOODING AND RUNOFF
ISSUES ACROSS THE LOWER COLOR DO RIVER VALLEY INTO THE PHOENIX
METRO AS WELL AS THE LOWER FOOTHILLS OF THE MOGOLLON RIM.  SNOW
SHOWERS ARE EXPECTED ALONG THE HIGHER ELEVATIONS OF THE MOGOLLON
RIM TOWARD THE EASTERN ARIZONA MOUNTAINS WITH TOTALS EXPECTED IN
THE  4 TO 8" RANGE THROUGH SUNDAY.

THE NEXT STORM SUMMARY WILL BE ISSUED BY THE WEATHER PREDICTION
CENTER AT 100 PM PST. PLEASE REFER TO YOUR LOCAL NATIONAL WEATHER
SERVICE OFFICE FOR ADDITIONAL INFORMATION ON THIS EVENT.

GALLINA