Storm Summary Number 6 for West Coast Atmospheric River
NWS Weather Prediction Center College Park MD
700 PM PST Tue Feb 04 2025

...Heavy rain and snow are ongoing from central California to the
northern Rockies as a cold front begins to push eastward across
the west coast... 

Flood Watches and Flood Warnings are in effect over portions of
north-central California.

Winter Storm Warnings are in effect across the Cascades, Sierra
Nevada, portions of Oregon and into the northern Rockies.

Winter Weather Advisories are in effect across northern California.

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

At 600 PM PST...Regional radar and surface observations showed a
band of widespread moderate to heavy rain pushing southeastward
across central California and the Sierra Nevada to south of the
Bay Area along a cold front that is starting to push through the
region. Far northern California and southern Oregon are seeing
moderate snowfall and the northern Rockies continue to see
moderate to heavy snowfall as a moist air mass interacts with a
stalled Arctic frontal boundary draped in the region. 

...Selected preliminary Storm Total Snowfall in inches from 600 AM
PST Fri Jan 31 through 600 PM PST Tue Feb 04...

...CALIFORNIA...
DAVIS CREEK                          18.0                    
SODA SPRINGS                         16.0                    
KINGVALE                             14.0                    
HEAVENLY SKI BASE                     7.0                    

...IDAHO...
GALENA                               33.0                    
HAILEY 3 WSW                         28.0                    
LOST TRAIL PASS                      24.0                    
BELLEVUE                             22.0                    
CRATERS OF MOON                      16.0                    
ELBA 6 NNW                           14.0                    

...MONTANA...
COOKE CITY                           32.0                    
LUTHER                               14.0                    
BILLINGS                              8.5                    

...OREGON...
ALTAMONT                              9.0                    
ASHLAND                               8.0                    
MEDFORD                               6.0                    
KLAMATH FALLS                         4.5                    

...WASHINGTON...
QUILLAYUTE                           11.0                    
MOUNT SAINT HELEN                     9.0                    
ILWACO                                6.0                    
NASELLE                               6.0                    

...Selected preliminary Storm Total Rainfall in inches from 600 AM
PST Fri Jan 31 through 600 PM PST Tue Feb 04...

...CALIFORNIA...
PALMETTO 0.9 SSW                    22.80                    
SWEETBRIAR 2 E                      21.32                    
BRUSH CREEK                         20.41                    
MIDDLE PEAK                         16.06                    
BRANDY CREEK                        15.04                    
REDDING                              9.28                    
BEN LOMOND RAWS                      8.01                    
SANTA ROSA                           6.62                    
SAN FRANCISCO                        3.83                    

...Selected preliminary Peak Wind gusts in miles per hour earlier
in the event...

...CALIFORNIA...
MAMMOTH MOUNTAIN 1.7 S                139                    

...NEVADA...
HAWTHORNE 6.1 NW                      110                    


Moderate to heavy rain and mountain snowfall should begin to wind
down tonight into Wednesday for most of California and southern
Oregon as the cold front passes through the region. An additional
1-2 inches of rain is possible over the next 12 hours along
coastal areas and down into southern California as the boundary
moves through. The Sierra Nevada mountain range may see 3-4 inches
of precipitation in the form of rain and snow as a heavier band of
precipitation was moving through the region as of this evening.
The northern Rockies will continue to see the chances of heavy to
moderate snow for the day Wednesday. Some wind gusts in the 20-30
mph range are also possible in California as the system moves
through the area. 

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.

Wilder