STORM SUMMARY NUMBER 4 FOR NORTHERN AND CENTRAL CALIFORNIA HEAVY
RAINFALL AND MOUNTAIN SNOW
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
700 AM PST TUE FEB 21 2017

...EXCEPT FOR THE PRECIPITATION ACROSS THE SIERRA...MUCH OF THE
EVENT HAS BEGUN TO WIND DOWN...

FLOOD WARNINGS AND FLOOD ADVISORIES REMAIN IN EFFECT ACROSS THE
INTERIOR PORTION OF NORTHERN CALIFORNIA...PARTS OF NORTHERN NEVADA
INTO SOUTHERN IDAHO.

FLOOD WATCHES HAVE BEEN ISSUED FOR PARTS OF EASTERN
WASHINGTON...NORTHERN IDAHO AND FAR NORTHERN HIGH PLAINS.

WINTER STORM WARNINGS AND WINTER WEATHER ADVISORIES ARE IN EFFECT
ALONG THE SIERRA NEVADA AND HIGHER ELEVATIONS OF NORTHERN
CALIFORNIA...SOUTHERN OREGON...AS WELL AS PORTIONS OF THE NORTHERN
ROCKIES.

HIGH WIND WARNINGS AND WIND ADVISORIES ARE IN EFFECT ALL OF
NORTHERN AND CENTRAL CALIFORNIA...INTO THE GREAT BASIN...AND THE
SOUTHERN HALF OF OREGON...AS WELL AS PARTS OF CENTRAL AND EASTERN
WYOMING.

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

AT 600 AM PST...A LOW PRESSURE SYSTEM WITH AN ESTIMATED CENTRAL
PRESSURE OF 1002 MB...29.59 INCHES...WAS CROSSING INTO
WEST-CENTRAL OREGON. RECENT SATELLITE IMAGERY SHOWED THE BEST
MOISTURE HAD SHIFTED WELL TO THE SOUTH TOWARD SOUTHERN
CA...GENERALLY ALONG THE ADVANCING COLD FRONT. NATIONAL WEATHER
SERVICE DOPPLER RADARS AND SURFACE OBSERVATIONS INDICATED THE MOST
ORGANIZED AREA OF PRECIPITATION REMAINED OVER THE SIERRA NEVADA
WHILE ACTIVITY HAD BECOME MORE SHOWERY IN NATURE TOWARD THE
NORTHERN/CENTRAL COAST. RECENT HOURLY OBSERVATIONS SHOWED THE
HIGHER ELEVATIONS OF THE SIERRA CONTINUED TO SEE SNOW AS THE
DOMINANT PRECIPITATION TYPE. MEANWHILE...LIGHT TO MODERATE RAIN
AND HIGH-ELEVATION SNOW CONTINUED TO SPREAD EASTWARD INTO PORTIONS
OF THE GREAT BASIN...INTERMOUNTAIN WEST...AND PACIFIC NORTHWEST.

...SELECTED STORM TOTAL SNOWFALL IN INCHES FROM 1000 PM PST SAT
FEB 18 THROUGH 600 AM PST TUE FEB 21...

...CALIFORNIA...
MOUNT ROSE SKI AREA NNE              31.0                    
MAMMOTH LAKES 2 W                    16.0                    
TUOLUMNE MEADOWS                     11.0                    
NORTHSTAR                             8.0                    
SQUAW VALLEY                          8.0                    
SUSANVILLE 5 WNW                      5.5                    

...NEVADA...
MOUNT ROSE SKI AREA                  16.0                    
INCLINE VILLAGE 1 E                  12.0                    
HEAVENLY VALLEY                       9.0                    

...SELECTED STORM TOTAL RAINFALL IN INCHES FROM 1000 PM PST SAT
FEB 18 THROUGH 600 AM PST TUE FEB 21...

...CALIFORNIA...
PESCADERO                            11.15                    
MINING RIDGE                          8.68                    
VENADO                                8.20                    
ANDERSON PEAK                         7.44                    
BIG SUR RAWS                          6.98                    
FT HUNTER LIGGETT RAWS                6.82                    
CENTRAL                               6.58                    
COOSKIE MTN RAWS NEAR PETROLIA        5.68                    
BEN LOMOND RAWS                       5.61                    
HONEYDEW 2 SSE                        5.40                    
CRESCENT CITY 10.6 NE                 5.38                    
VENADO 7 NNW GUERNEVILLE              5.00                    
YORKVILLE                             4.28                    
CAMP SIX RAWS NEAR GASQUET            4.00                    
KENTFIELD                             3.98                    
BLUE CANYON                           3.93                    
BOULDER CREEK 1 SSE                   3.63                    
REDDING 7.9 NNE                       3.61                    
HONEYDEW                              3.60                    
CLOVERDALE 5 NNW                      3.20                    
SPRING VALLEY                         3.16                    
MIDDLE PEAK RAWS                      3.04                    
TAYLOR RIDGE                          3.04                    
TRINITY CENTER 1 ESE                  3.03                    
LAYTONVILLE RAWS                      2.90                    
MIRANDA 4 SW                          2.83                    
SAN RAFAEL                            2.74                    
VACAVILLE                             2.71                    
WATSONVILLE MUNI ARPT                 2.61                    
LEXINGTON HILLS 2 SSE                 2.57                    
SANTA ROSA/SONOMA CO. ARPT            2.47                    
RICHMOND                              1.98                    
SAN FRANCISCO                         1.96                    
ARCATA/EUREKA AIRPORT                 1.76                    
SANTA ROSA/SONOMA COUNTY ARPT         1.50                    
MONTEREY AIRPORT                      1.33                    

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

...CALIFORNIA...
SLATE CREEK RAWS                      79                    
CAMP SIX RAWS NEAR GASQUET            70                    
COOSKIE MTN RAWS NEAR PETROLIA        68                    
KNEELAND 3 ESE                        68                    
PANOCHE ROAD WEST OF I-5              64                    
FAIRHAVEN 1 WSW                       63                    
MENDOCINO PASS RAWS                   61                    
JACK MCNAMARA FIELD ARPT              60                    


GIVEN THE DIMINISHMENT IN MOISTURE CONTENT OVER THE AREA COMBINED
WITH THE SYSTEM WEAKENING AS IT MOVED ONSHORE EARLY THIS
MORNING...EXPECT THE AREAL COVERAGE OF PRECIPITATION TO CONTINUE
TO DECREASE THROUGHOUT THE DAY. 1 TO 2 INCHES OF ADDITIONAL RAIN
IS POSSIBLE OVER SOUTHWEST OREGON AND NORTHERN CALIFORNIA COASTAL
AREAS TODAY BEFORE THE RAIN TAPERS OFF TONIGHT.  FLASH FLOODING
WILL REMAIN A THREAT OVER CENTRAL CALIFORNIA TODAY DUE TO
ANTECENDENT HEAVY RAINS.  OVER THE HIGHER TERRAIN ALONG THE SIERRA
IN CALIFORNIA AND THE CASCADES IN OREGON...AN ADDITIONAL 6 TO 12
INCHES OF SNOW WILL BE POSSIBLE.  IN ADDITION TO THE HEAVY RAIN
AND SNOW THREAT...DAMAGING WINDS GUSTING TO 60 TO 70 MPH ARE
POSSIBLE...ESPECIALLY ALONG THE COAST AND OVER THE HIGHER TERRAIN.

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.

RUBIN-OSTER