STORM SUMMARY NUMBER 6 FOR SOUTHERN CALIFORNIA AND ARIZONA HEAVY
RAINFALL EVENT
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
100 PM PST SAT FEB 18 2017

...RAINFALL SHIFTING FROM SOUTHEAST CALIFORNIA INTO WESTERN AND
CENTRAL ARIZONA...WITH SNOW ALONG THE MOGOLLON RIM AND GILA
MOUNTAINS... 

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

WINTER STORM WARNINGS...AND WINTER WEATHER ADVISORIES ARE IN
EFFECT ACROSS TRANSVERSE RANGES IN SOUTHERN CALIFORNIA...AND INTO
THE MOGOLLON RIM AND GILA AND SAN FRANCISCO MOUNTAINS OF ARIZONA
AND WESTERN NEW MEXICO.

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

AT 1200 PM PST...THE DEEP UPPER TROUGH CONTINUES TO STRETCH ACROSS
EASTERN CALIFORNIA/WESTERN NEVADA INTO THE LOWER COLORADO RIVER
BASIN AND INTO THE SEA OF CORTEZ. THE SOUTHERN PORTION OF THE
TROUGH IS SHIFTING EAST A BIT FASTER THROUGH NORTHWEST MEXICO AND
RESULTED IN A FEW WEAK SURFACE LOW PRESSURE AREAS ALONG THE LOWER
COLORADO RIVER AS WELL AS IN NORTHERN BAJA CALIFORNIA.  THE
CENTRAL PRESSURE OF THE DOMINANT SURFACE LOW IN NORTHERN BAJA
CALIFORNIA IS 1001 MB...29.56 INCHES.  NATIONAL WEATHER SERVICE
DOPPLER RADARS AND SURFACE OBSERVATIONS INDICATE AN ELONGATED
NORTH TO SOUTH SHIELD OF RAIN SHOWERS FROM NORTH OF LAS VEGAS TO
THE NORTHERN EXTENT OF THE SEA OF CORTEZ ALONG THE FRONTAL
BOUNDARY.  SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS WERE ALSO
DEVELOPING THROUGH SOUTH CENTRAL ARIZONA WITH BOTH THE PHOENIX TO
TUCSON CORRIDOR AFFECTED.   THESE SHOWERS HAVE LIFTED NORTH INTO
THE MOGOLLON RIM AND STARTED CONVERTING TO MODERATE TO HEAVY SNOW
SHOWERS.  

...SELECTED STORM TOTAL RAINFALL IN INCHES FROM 1200 AM PST FRI
FEB 17 THROUGH 000 PM 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...
HAWTHORNE                             1.96                    
BEATTY - TIMBER MTN                   1.69                    
GOLDFIELD 1 N                         1.53                    

...SELECTED STORM TOTAL SNOWFALL IN INCHES FROM 1200 AM PST FRI
FEB 17 THROUGH 000 PM PST SAT FEB 18...

...CALIFORNIA...
JUNE LAKE                            36.0                    
MAMMOTH MOUNTAIN                     30.0                    

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

...ARIZONA...
TUCSON 4 SW                           56                    
HOPKINS                               51                    
SELLS                                 46                    
NOGALAS AIRPORT                       45                    
SASABE                                44                    
SIERRA VISTA MUNI ARPT                43                    

...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 UPPER LEVEL TROUGH AND ASSOCIATED SURFACE LOW PRESSURE WILL
CONTINUE TO TRACK EASTWARD ACROSS ARIZONA/NORTHWEST MEXICO WITH
MODERATE MOISTURE LIFTED NORTHWARD IN ADVANCE OF THE ASSOCIATED
SURFACE FRONT LEADING TO MODERATE TO OCCASIONALLY HEAVY RAINFALL. 
THIS ADDITIONAL RAINFALL MAY REACH TOTALS OF 1 TO 2 INCHES AND
CONTINUE THE THREAT FOR ISOLATED FLOODING AND RUNOFF CONCERNS
ACROSS THE LOWER COLORADO RIVER VALLEY...PHOENIX METRO AND THE
LOWER FOOTHILLS OF THE MOGOLLON RIM.  SNOW SHOWERS ARE EXPECTED
ALONG THE HIGHER ELEVATIONS OF THE MOGOLLON RIM AND INTO THE GILA
AND SAN FRANCISCO MOUNTAIN RANGES OF EASTERN ARIZONA AND WESTERN
NEW MEXICO WITH TOTALS EXPECTED IN THE 6 TO 10 INCH RANGE THROUGH
SUNDAY.

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