####018006316#### ACUS43 KWBC 020321 SCCNS3 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 $$