Storm Summary Number 5 for West Coast Atmospheric River
NWS Weather Prediction Center College Park MD
700 AM PST Tue Feb 04 2025

...Heavy rain and mountain snow continue over central and northern
California due to long duration atmospheric river... 

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.

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

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

At 600 AM PST...Regional radar and surface observations showed
widespread moderate to heavy rain and mountain snow associated
with an atmospheric river streaming inland across north-central
California and into the northern Rockies. Precipitation was
focused along and just ahead of a quasi-stationary frontal
boundary that extended across northern California into the
northern Great Basin.

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

...CALIFORNIA...
DAVIS CREEK                          18.0                    
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                    

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

...WASHINGTON...
NASELLE                               3.5                    

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

...CALIFORNIA...
PALMETTO 0.9 SSW                    20.72                    
SWEETBRIAR 2 E                      18.72                    
HILLCREST 1.3 E                     12.92                    
BRUSH CREEK RANGER STATION          12.81                    
STORRIE                             10.92                    
FOUR TREES                           9.88                    
ANGELO COAST RANGE RESERVE           9.80                    
REDDING 7.9 NNE                      9.80                    
RUTH                                 9.04                    
BLUE CANYON                          7.22                    
VENADO                               6.56                    

...OREGON...
O'BRIEN                              3.10                    
BROOKINGS                            2.67                    

...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 will continue through
Wednesday as an atmospheric river continues to take aim at central
and northern California, leading to additional rainfall amounts of
2-4 inches for the Coastal Ranges and at least another 3 to 5
inches into the upslope regions of the central and northern Sierra
Nevada through Wednesday morning. These additional rainfall totals
falling on top of saturated soils will maintain a threat for
scattered flooding, mudslides, and debris flows across the region.
Additionally, winter weather impacts will continue for the Sierra
Nevada, southern Oregon, and the northern Rockies as a wave of low
pressure and plume of moisture move along and ahead of the frontal
boundary through Tuesday night. Some snow in the northern Rockies
and Cascades across the Pacific Northwest could be locally heavy
and make for difficult traveling conditions through mid-week.

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

Otto