####018004106####
ACUS44 KWBC 070248

SCCNS4



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

$$