Storm Summary Number 1 for Major West Coast Winter Storm
NWS Weather Prediction Center College Park MD
700 AM PST Wed Jan 27 2021

...Strong winds and heavy precipitation impacting much of northern
and central California... 

Blizzard Warnings are in effect for portions of the Sierra.

Winter Storm Warnings are in effect for portions of central
Washington, southwestern and eastern Oregon, southern Idaho,
northern California, the Sierra, western Nevada, and the southern
California mountains.

High Wind Warnings are in effect for portions of central and
southern California.

Flood Advisories and Flash Flood Watches and Warnings are in
effect for portions of central and southern California.

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

At 600 AM PST...A low pressure center was located off of the
Oregon coast, near 41N 127W, with an estimated pressure of 990 mb,
or 29.23 inches of mercury. An occluded frontal boundary extended
along the coast from Washington to central California. Light to
moderate rain was observed along the northern California coast
into the central valleys, with moderate to locally heavy rain
along the central California coast. Moderate to heavy snow was
observed in the northern California mountains and the Sierra.
Light snow was observed across portions of central and eastern
Washington, eastern Oregon, Idaho, and northern Nevada. 

...Selected preliminary Storm Total Snowfall in inches from 600 AM
PST Thu Jan 26 through 600 AM PST Sat Jan 27...

...CALIFORNIA...
WEAVERVILLE 10 NE                    30.0                    
MOUNT SHASTA                         22.0                    
WEED 2 SSW                           20.0                    

...Selected preliminary Storm Total Rainfall in inches from 600 AM
PST Thu Jan 26 through 600 AM PST Sat Jan 27...

...CALIFORNIA...
FELTON 4.5 NNE                       4.36                    
BOULDER CREEK 4.1 N                  3.44                    
WATSONVILLE MUNICIPAL                1.69                    
FORT BRAGG 3.5 S                     1.64                    
SANTA ROSA                           1.56                    
SAN FRANCISCO INTL AIRPORT           1.37                    

...OREGON...
GOLD BEACH                           1.87                    

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

...CALIFORNIA...
ALPINE MEADOWS 2.9 W                  125                    
KIRKWOOD MEADOWS 1.2 S                103                    
SANTA CRUZ                             84                    
MT UMUNHUM                             78                    
MT ALISON                              72                    
COALINGA 11 NNW                        69                    
MCCLELLAN AFB                          67                    
PULGA 2.2 NW                           67                    
MARYSVILLE AIRPORT                     66                    
TANCRED 2.7 NE                         66                    
DENVERTON 4.8 NE                       65                    
SAN JOSE                               65                    
SNELLING 18 NNE                        65                    
SACRAMENTO INTL AIRPORT                63                    


Very heavy snows will continue to impact a large portion of the
northern California mountains and Sierra. Through Friday,
additional snowfall accumulations of 4 feet or more are expected
across a large portion of the Sierra. Additional snowfall
accumulations of 1-2 feet, with locally heavier amounts, are
expected across the mountains of northern California, the southern
California coastal ranges, as well as the eastern Oregon, southern
Idaho and western Wyoming ranges. Snowfall accumulations of 6-12
inches, with locally heavier amounts, are expected across the
Nevada and Utah mountains. This system will also continue to
produce periods of periods of very heavy rainfall, with amounts of
5-10 inches possible along the central and southern California
coasts. Flash flooding and debris flows are likely, especially
near, but not limited to burn scar areas. Strong gusty winds can
also be expected along the California coastline, in the Bay Area,
and across the Sacramento Valley.

The next Storm Summary will be issued by the Weather Prediction
Center at 700 AM PST Thu Jan 28 2021. Please refer to your local
National Weather Service office for additional information on this
event.

Pereira