####018010827#### ACUS45 KWBC 130235 SCCNS5 Storm Summary Number 4 for Major Pacific Coast to High Plains Storm System NWS Weather Prediction Center College Park MD 700 PM PST Mon Dec 12 2022 ...Winter storm tracking across the Intermountain West producing heavy mountain snows before advancing into the Northern Plains tomorrow... Blizzard Warnings are in effect for portions of the Northern High Plains and Intermountain West. Winter Storm Warnings are in effect over portions of the Intermountain West, High Plains, Northern Plains, and Upper Midwest. Ice Storm Warnings are in effect for portions of the Northern Plains. High Wind Warnings are in effect for portions of the central Plains and central New Mexico. Winter Storm Watches are in effect for portions of the Upper Midwest. Winter Weather Advisories are in effect for portions of the Intermountain West, Rockies, Northern Plains, and Upper Midwest. Wind Advisories are in effect for Iowa and southern Minnesota. For a detailed graphical depiction of the latest watches, warnings and advisories, please see www.weather.gov At 600 PM PST...A potent storm system continued to track eastward through the Intermountain West, and was analyzed along the Colorado Rockies range, with a central pressure of 993mb or 29.32 inches of mercury. An occluded boundary extended southward from the low across southern Colorado, before connecting to a cold front along the CO/NM border, which was analyzed stretching southward through central New Mexico. Meanwhile, a frigid arctic airmass continued to surge south over the Northern Plains and Intermountain West, with a southward advancing cold front being analyzed north of the main low, ushering in temperatures 10-20 degrees below average behind the front. Current surface observations and RADAR depict scattered areas of moderate to heavy rain and elevation snow over the Intermountain West associated with the storm system. ...Selected preliminary Storm Total Snowfall in inches from 700 AM PST Tue Dec 11 through 600 PM PST Mon Dec 13... ...ARIZONA... MORMON LAKE 10.0 FOREST LAKES 9.0 GREER 6 WSW 8.0 NWS FLAGSTAFF 5.6 PRESCOTT 3.0 ...COLORADO... DOUGLAS PASS 13.0 SILVERTON .3 WSW 3.5 DURANGO 1 SSW 3.0 ...IDAHO... KETCHUM 1 SSE 36.0 BELLEVUE 18.8 SUN VALLEY 2 SW 17.0 FEATHERVILLE 14.0 BOISE 16 NNE 13.0 DOVER 2 WNW 10.2 ...MONTANA... GREAT FALLS 2 WNW 4.0 DIXON 3.0 MISSOULA 4.4 W 3.0 ...NEVADA... MT. ROSE SKI BASE 48.0 SKY TAVERN 43.0 DIAMOND PEAK SKI BASE 42.0 INCLINE VILLAGE 1 NNW 38.0 ZEPHYR COVE 30.0 VIRGINIA CITY 3 NNW 21.0 RENO 4 SW 12.0 ...NEW MEXICO... MOGOLLON 6 ESE 5.0 PAJARITO MOUNTAIN 1 NNE 4.0 EDGEWOOD 6.1 NW 3.3 ...OREGON... REDMOND 8 ESE 10.5 MT. ASHLAND SKI ROAD 8.0 BEND 6.0 MADRAS 6.0 LA PINE 5 NNW 5.0 E DIAMOND LAKE SUMMIT 4.0 ...UTAH... ALTA 17.0 POWDER MOUNTAIN 13.0 LOGAN 11.0 ...WASHINGTON... FORTY-NINE DEGREES NORTH 22.0 LEAVENWORTH 2 SSW 20.5 TROUT LAKE 1 SSW 17.5 MALOTT 7 WNW 17.0 WAUCONDA 12 S 9.0 FIVE MILE 7 NW 8.8 YAKIMA 2 ENE 5.0 ...WYOMING... JACKSON 5.3 NW 4.0 ...Selected preliminary Storm Total Rainfall in inches from 700 AM PST Tue Dec 11 through 600 PM PST Mon Dec 13... ...CALIFORNIA... LOS GATOS 7.01 INTERLAKEN 4.4 NE 6.63 HONEYDEW 2 SSE 5.39 FIDDLETOWN 3.5 SE 5.10 VOLCANO 3.7 N 4.87 OJAI 5.9 E 4.76 BUCKS LAKE 1 NW 4.44 BOULDER CREEK 3 NW 4.38 EBBETTS PASS 4.30 CITRUS HEIGHTS 3.73 WOODLAND 3.62 ARNOLD 3.48 STRAWBERRY VALLEY 3.48 LA CRESCENTA-MONTROSE 1.2 SW 3.34 DOWNIEVILLE 3.33 SOUTH PASADENA 0.9 SSW 1.92 ...OREGON... GOLD BEACH 3.00 SELMA 2.33 ...Selected preliminary Peak Wind gusts in miles per hour earlier in the event... ...CALIFORNIA... HEAVENLY SKI SUMMIT 1 NNW 103 MAMMOTH MOUNTAIN SKI 98 WALKER 4 SSW 93 ANTELOPE LAKE 5 NNW 92 AGUA DULCE 6 NE 89 CRESTLINE 2 NNE 84 BIG PINES 4 NNW 80 SAN LUIS OBISPO 4 NE 80 LYTLE CREEK 7 NNE 77 FT DICK 5 SE 60 KNEELAND 2 ESE 57 HIGHLANDS 1 SW 40 ...MONTANA... BIG SKY 6 WSW 67 EMIGRANT 10.7 W 66 LIVINGSTON 2 WSW 63 LIMA 4 NE 57 ...NEVADA... WASHOE CITY 4 NNW 76 GREAT BASIN NP 3 WSW 75 MT. CHARLESTON 6 NE 75 STEAD 2 WSW 73 SPARKS 3 SSW 66 GARDENVILLE RANCH 3 WSW 65 ...NEW MEXICO... BINGHAM 10 S 67 VAUGHN 11 SE 66 BOSQUE DEL APACHE 21 SE 64 CLINES CORNERS 1 S 59 ...OREGON... PILOT ROCK 9 S 80 TALENT 2 NE 50 ...UTAH... LOFTY LAKE PEAK 81 CENTRAL WASATCH PEAKS 79 REYNOLDS PEAK 75 SIGNAL PEAK 69 CEDAR CITY 62 MONUMENT PEAK 60 ...Selected preliminary Storm Total Snowfall in inches where the event has ended... ...CALIFORNIA... SIERRA AT TAHOE 70.0 SODA SPRINGS 2 ENE 60.0 TWIN BRIDGES 2 ESE 48.0 TAHOE-DONNER 46.0 PALISADES TAHOE SKI BASE 44.0 PINECREST 2 E 39.0 MAMMOTH MOUNTAIN SKI BASE 30.0 ASPENDELL 24.5 MT. SHASTA SKI PARK 21.0 WEED 2 SSW 18.0 CARRVILLE 14 N 10.0 Heavy snowfall is expected to continue across the Intermountain West overnight into Tuesday morning, which could result in hazardous travel in the terrain. However, the most widespread and substantial impacts will occur as the system ejects into the Central Plains on Tuesday as a developing low-pressure center tracks eastward. This will result in heavy snow and blizzard conditions across portions of the Central and Northern High Plains through Wednesday. A rather broad swath of 12"+ of snow is forecast to fall along an axis extending from southwestern Nebraska northward through South Dakota, North Dakota, and eastern Montana, with localized areas potentially receiving over 2 feet of snow, especially across southern South Dakota. Multiple days of significant impacts to travel and infrastructure is expected due to snow, blowing snow, and freezing rain, with travel becoming impossible at times. 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. Russell/Asherman $$