Storm Summary Number 4 for Pacific Northwest Atmospheric River
NWS Weather Prediction Center College Park MD
700 PM PST Wed Dec 6 2023

...Atmospheric river to continue weakening across the Pacific
Northwest through tonight...

Flood watches are in effect for portions of extreme northwestern
California

Flood warnings and advisories are in effect for portions of
western Washington, western Oregon, northeastern Washington and
northern Idaho.

For a detailed graphical depiction of the latest watches, warnings
and advisories, please see www.weather.gov

At 600 PM PST...A frontal boundary was draped southwest to
northeast across the Pacific Northwest. Regional Doppler radars
are indicating light to moderate rainfall focusing along the
surface boundary from northwest California and western Oregon into
central and eastern Washington and northern Idaho. Some wind gusts
upwards of 40 mph have also been observed across portions of the
Cascades in western Washington and western Oregon with this event.

...Selected preliminary Storm Total Rainfall in inches from 700 AM
PST Mon Dec 4 through 600 PM PST Wed Dec 6...

...CALIFORNIA...
KLAMATH RIVER AT TURWAR CREEK        1.68                    
CRESCENT CITY                        1.16                    

...IDAHO...
PORTHILL 14 W                        7.10                    
BEAR MOUNTAIN                        5.40                    
MOSQUITO RIDGE                       4.70                    
SADDLE PASS                          4.41                    
CLARK FORK 11.9 NE                   4.20                    
COLBURN 5.0 W                        3.60                    
PRIEST LAKE                          3.03                    

...OREGON...
NEHALEM RIVER NEAR FOSS              9.73                    
LEES CAMP                            8.20                    
CEDAR                                8.09                    
JEWELL WILDLIFE MEADOWS              6.10                    
TILLAMOOK                            5.45                    
FLORENCE                             3.46                    
ASTORIA                              3.45                    
NEWPORT                              3.44                    
PORTLAND INTERNATIONAL AIRPORT       3.17                    
SALEM                                3.10                    

...WASHINGTON...
GRANITE FALLS                        9.90                    
OLYMPIC NP                           8.67                    
ALPINE MEADOWS                       8.60                    
GOLD HILL                            8.31                    
LONE PINE                            8.10                    
VERLOT                               8.00                    
ABERNATHY MOUNTAIN                   7.42                    
MT BAKER - HEATHER MEADOWS           7.14                    
MOUNT TEBO                           6.60                    
FINNEY CREEK                         6.48                    
OWL MOUNTAIN                         6.35                    
BREMERTON                            5.85                    
SNOQUALMIE 1 NW                      5.20                    
QUILLAYUTE                           4.62                    
OLYMPIA                              4.49                    
SEATTLE INTERNATIONAL AIRPORT        3.95                    
TACOMA                               3.91                    


The ongoing atmospheric river should will continue to taper off
through this evening and into tonight as the Pacific cold front
steadily moves inland. Although the heaviest rainfall has already
occurred with this event, some locations may get up to an
additional inch, but most areas should be less than that. This
will be the last storm summary for this event. For more
information regarding the latest Excessive Rainfall threat, please
visit wpc.ncep.noaa.gov.



Hamrick