STORM SUMMARY NUMBER 4 FOR WEST COAST ATMOSPHERIC RIVER AND HEAVY
RAIN
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
200 PM PDT SAT APR 07 2018

...MODERATE TO HEAVY RAIN IS COMING TO AN END ACROSS CENTRAL
CALIFORNIA AS AN ATMOSPHERIC RIVER WINDS DOWN... 

FLOOD WATCHES AND FLOOD ADVISORIES ARE IN EFFECT FOR PORTIONS OF
NORTHERN AND CENTRAL CALIFORNIA.

HIGH WIND WARNINGS ARE IN EFFECT FOR PORTIONS OF OREGON AND
WASHINGTON...NORTHERN CALIFORNIA AND NORTHERN NEVADA.

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

AT 100 PM PDT...A SURFACE LOW WITH A CENTRAL PRESSURE OF 970
MB...28.64 INCHES...WAS CENTERED APPROXIMATELY 230 MILES WEST
VANCOUVER ISLAND AND MOVING NORTHEASTWARD. AHEAD OF THE LOW
PRESSURE SYSTEM AN ATMOSPHERIC RIVER WAS PROVIDING HIGH TO
RECORD-BREAKING AMOUNTS OF MOISTURE TO CALIFORNIA. NATIONAL
WEATHER SERVICE DOPPLER RADARS AND SURFACE OBSERVATIONS INDICATED
THAT MODERATE TO HEAVY RAIN WAS FALLING ACROSS PORTIONS OF CENTRAL
CALIFORNIA. LIGHT TO MODERATE RAIN WAS FALLING ACROSS MUCH OF
WASHINGTON...OREGON...NEVADA...UTAH AND SOUTHERN IDAHO. 

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

...CALIFORNIA...
BURNS CANYON                          62                    
WHITEWATER RAWS 2 N                   60                    
MOJAVE ARPT                           51                    

...SELECTED PRELIMINARY STORM TOTAL RAINFALL IN INCHES WHERE THE
EVENT HAS ENDED...

...CALIFORNIA...
SHELTER COVE 0.6 NNE                  8.34                    
GUALALA 1.2 SE                        8.06                    
WHITEHORN  1.4 NW                     7.93                    
CAZADERO 5.6 W                        7.91                    
MONTE RIO 10 WNW                      7.91                    
OCCIDENTAL 2.8 SW                     7.39                    
ALBION 4.0 SE                         7.09                    
SEBASTOPOL 4.5 WSW                    6.63                    
LAYTONVILLE 1.1 SW                    6.30                    
GUERNEVILLE 2.0 SSW                   5.92                    
MIDDLE PEAK RAWS                      5.79                    
MILL VALLEY 2 W                       5.69                    
BODEGA BAY 1.0 SE                     5.64                    
VENADO 7 NNW GUERNEVILLE              5.04                    
COMPTCHE 9 W                          4.28                    
DILLON BEACH                          4.22                    
LEGGETT 1 NW                          4.04                    
ROCKPORT 3 N                          4.00                    
BLUE CANYON/NYACK ARPT                3.34                    
YOUNTVILLE 3 WSW                      3.04                    
SANTA ROSA/SONOMA CO. ARPT            2.98                    
UKIAH MUNI ARPT                       2.95                    
SAN FRANCISCO 1 SW                    2.93                    
OAKLAND 3 NE                          2.54                    
REDDING MUNI ARPT                     2.49                    
SACRAMENTO METRO ARPT                 1.27                    


THE ATMOSPHERIC RIVER HAS BEGUN TAPERING OFF OVER CALIFORNIA THIS
AFTERNOON ONCE THE SURFACE LOW  APPROACHED BRITISH COLUMBIA AND
THE COLD FRONT MOVED INLAND ACROSS THE WEST COAST STATES. THE
HEAVIEST RAINFALL RATES ARE ENDING ACROSS CALIFORNIA. ONSHORE FLOW
IN THE WAKE OF THE COLD FRONT AND AHEAD OF AN APPROACHING LOW
PRESSURE OFF THE COAST WILL KEEP SHOWERS IN PLACE INTO SUNDAY
ACROSS THE PACIFIC NORTHWEST. MODERATE TO HEAVY RAIN WILL BE
POSSIBLE FOR PORTIONS OF THE PACIFIC NORTHWEST AND IDAHO...WITH
LOCALIZED AMOUNTS OF 3 TO 5 INCHES OF RAIN WHERE OROGRAPHIC LIFT
ENHANCES PRECIPITATION RATES.

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.

CAMPBELL