The Weather Prediction Center

College Park, MD


Storm Summary Message



Storm Summary Number 3 for Winter Weather Associated with a
Pacific Northwest Winter Storm
NWS Weather Prediction Center College Park MD
700 PM PST Thu Dec 01 2022

...Snow, sleet, and mixed precipitation is being observed in
portions of the interior Pacific Northwest into the Rocky
Mountains ahead of frigid Arctic air...

Winter Storm Warnings are in effect for portions of northwestern
Washington, eastern California, central and eastern Idaho,
north-central Utah, west-central Colorado, western Wyoming, and
portions of western and southern Montana.

Winter Storm Watches are in effect in northern California.

Winter Weather Advisories are in effect over various areas of the
Intermountain West.

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

At 500 PM PST...An occluding area of low pressure traversed over
the open Pacific Ocean and made its way toward the Pacific
Northwest, bringing precipitation beginning early Tuesday for
portions of northwestern Washington. This low has since moved
inland, and at 5:00PM PST, a 995-mb surface low was analyzed in
central Idaho where mixed precipitation can be seen along a cold
front. NWS Doppler Radar imagery identified ongoing periods of
moderate to heavy snow across north-central Montana, southeastern
Idaho into northern Nevada, and in the central Sierra Nevada
mountains. This storm system is slowly drifting eastward under a
positively tilted upper-level trough. To the north, a frigid
Arctic airmass is slowly making its way into the northern High
Plains, where temperatures are in the single digits.

...Selected preliminary Storm Total Snowfall in inches from 700 AM
PST Tue Nov 29 through 600 PM PST Thu Dec 01...

...CALIFORNIA...
WEED 2 SSW                           11.0                    
MT SHASTA 1.7 SSE                    10.3                    
SUSANVILLE 5 WNW                      8.0                    
MEADOW VALLEY 5.6 WSW                 5.0                    
ALTURAS 9.5 E                         4.7                    
MAD RIVER 1.7 SW                      2.4                    
TRUCKEE 1.6 N                         1.8                    

...COLORADO...
CRESTED BUTTE 1.9 NE                 10.6                    
STEAMBOAT SPRINGS 1.9 E               8.0                    
BOULDER 2.2 W                         7.5                    
DEERMONT 1.2 ENE                      7.3                    

...IDAHO...
COUER D'ALENE 6.6 SSW                19.7                    
MCCALL 3.6 WNW                       17.5                    
NAPLES 0.4 NW                        16.0                    
HOPE 4.4 SW                          14.5                    
BELLEVUE 0.3 SSE                      8.3                    
GRANGEVILLE 0.4 SW                    6.4                    
BOISE CITY 12.3 ENE                   6.0                    
POCATELLO 2.5 NE                      4.3                    

...MONTANA...
NOXON 4,2 WNW                        12.8                    
DUPUYER 15 SW                        10.0                    
ARLEE 16.7 WNW                        8.0                    
KALISPELL 10.1 SW                     7.7                    

...OREGON...
SKI BLUEWOOD 9 SW                    10.0                    
KLAMATH FALLS 3.4 ESE                 9.5                    
ELGIN 9.8 N                           9.0                    
HOOS RIVER 0.8 SSW                    8.1                    
FLORA 1.0 SE                          8.0                    
SANTIAM PASS 1.0 WSW                  8.0                    
SUNSET SUMMIT                         8.0                    
MARION FORKS 1 SW                     7.0                    

...UTAH...
HEBER CITY 10.1 ESE                  10.5                    
BOUNTIFUL 0.8 SE                      9.5                    
KAYSVILLE 1.2 N                       9.2                    

...WASHINGTON...
TROUT LAKE 0.8 SSW                   26.4                    
EASTON 6.2 NNW                       26.3                    
MT SAINT HELENS 3 SE                 23.0                    
UPPER LEWIS RIVER FALL 9 NNW         22.0                    
SPOKANE 6.1 N                        15.0                    
MAZAMA 6 ESE                         14.8                    
WHITE SALMON 7.4 NE                  13.7                    
HOODSPORT 3.7 WNW                    11.2                    
GRAND COULEE 3.2 ESE                 11.0                    
CONCRETE 1.4 SSW                     10.0                    
MINERAL 0.2 S                         8.5                    
EVERETT 1.0 S                         7.0                    
SEATTLE 2.1 ESE                       1.5                    

...WYOMING...
TETON VILLAGE 1.6 NE                  8.5                    
ELK MOUNTAIN 0.3                      5.2                    
LANDER 7.3 WNW                        5.1                    
CHEYENNE 2.2 NNE                      4.7                    


This storm system is expected to move off to the east across the
north-central Plains on Friday. This will drive a cold front
northeast to southwest from Minnesota to southern California with
precipitation occurring along it. In the Intermountain West,
additional snowfall totals will be up to 8 inches in portions of
Idaho, Utah, western Wyoming, and northwestern Montana, with as
much as 12 to 18 inches in north-central Utah. Meanwhile, the
heaviest snowfall will be in the Sierra Nevada Mountains with 1 to
4 feet of snow expected. The snowfall rates will be particularly
dangerous, and may exceed 3+ inches per hour in the higher
elevations. Travel conditions are expected to deteriorate as a
result across the region, and there will also be an additional
risk of avalanches on backcountry roads.

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.

Genz




Last Updated: 1056 PM EST THU DEC 01 2022