The Weather Prediction Center

College Park, MD

Storm Summary Message

Storm Summary Number 2 for Pacific Northwest Atmospheric River
NWS Weather Prediction Center College Park MD
700 PM PST Tue Dec 5 2023

...Atmospheric river to continue flowing across the Pacific
Northwest through Wednesday morning but will weaken in intensity...

Flood Watches are in effect for portions of western Washington and
western Oregon

Flood Warnings are in effect across portions of the Coastal Range
and the western slopes of the Cascades in Oregon and Washington.

For a detailed graphical depiction of the latest watches, warnings
and advisories, please see

At 600 PM PST...Regional Doppler radars are indicating widespread
moderate to locally heavy rainfall streaming onshore across
southwestern Washington and northwestern Oregon in the general
vicinity of a stationary front, and lighter rainfall across
interior portions of the Pacific Northwest. Some wind gusts
upwards of 40 mph have also been observed across portions of the
Cascades in western Washington and western Oregon.

...Selected preliminary Storm Total Rainfall in inches from 700 AM
PST Mon Dec 4 through 600 PM PST Tue Dec 5...

NEHALEM RIVER NEAR FOSS              8.47                    
LEES CAMP                            8.20                    
JEWELL WILDLIFE MEADOWS              5.30                    
TILLAMOOK                            4.21                    
ASTORIA                              3.33                    
LOG CREEK                            3.32                    
PORTLAND INTERNATIONAL AIRPORT       1.17                    

GRANITE FALLS                        9.85                    
OLYMPIC NP                           8.67                    
HOODSPORT                            7.12                    
QUINAULT 2 NE                        6.99                    
MT BAKER                             6.85                    
ABERNATHY MOUNTAIN                   6.36                    
CUSHMAN DAM                          6.30                    
OWL MT                               6.21                    
HOODSPORT 4 WNW                      5.97                    
GOLD BAR 5 S                         5.90                    
VERLOT                               5.50                    
GOLD HALL                            5.40                    
FINNEY CREEK                         5.14                    
NAVY YARD CITY 1 NW                  5.00                    
SNOQUALMIE 1 NW                      5.00                    
QUILLAYUTE                           4.72                    
BREMERTON 7 WNW                      4.43                    
OLYMPIA                              4.29                    
SEATTLE INTERNATIONAL AIRPORT        3.39                    

The ongoing atmospheric river is expected to persist through
Wednesday afternoon as the Pacific cold front slowly moves inland.
 Although the heaviest rainfall has already occurred with this
event, an additional 1 to 3 inches of rainfall is expected, with
locally higher amounts, which will maintain an excessive rainfall
threat through Wednesday morning along the Oregon coastline and
the coastal ranges, and also along the Cascades given the degree
of saturated soils in the area owing to recent heavy rainfall. For
more information regarding the latest Excessive Rainfall threat,
please visit

The next Storm Summary will be issued by the Weather Prediction
Center at 700 AM PST. Please refer to your local National Weather
Service office for additional information on this event.


Last Updated: 953 PM EST TUE DEC 05 2023