####018006773#### ACUS43 KWBC 090242 SCCNS3 Storm Summary Number 8 for West Coast Multi-Hazard Atmospheric River Events NWS Weather Prediction Center College Park MD 700 PM PST Sun Jan 08 2023 ...Brief reprieve from heavy rain/snow and high winds across California as next Atmospheric River event set to move onshore late tonight into Monday... Winter Storm Warnings are in effect for portions of the Sierra Nevada and Klamath Mountain Ranges. High Wind Warnings are in effect for much of coastal California, the Central Valley, and southern coastal Oregon. Flood Watches are in effect for much of coastal California, and the southern Sacramento Valley through San Joaquin Valley. Winter Storm Watches are in effect for northwestern Nevada. Winter Weather Advisories are in effect for much of northern Nevada and the Wasatch Range of Utah. Wind Advisories are in effect over coastal California, the Sacramento Valley through the San Joaquin Valley, and southern Oregon. For a detailed graphical depiction of the latest watches, warnings and advisories, please see www.weather.gov At 600 PM PST...Latest surface observations and RADAR detected light precipitation falling across coastal California ahead of the next Atmospheric River event that is expected to move onshore late tonight into Monday. Further north, light to moderate precipitation was reported across coastal Washington as onshore flow on the south side of a weakening low-pressure center produced high-elevation snow and valley rainfall. ...Selected preliminary Storm Total Snowfall in inches from 700 AM PST Wed Jan 04 through 600 PM PST Sat Jan 08... ...CALIFORNIA... KIRKWOOD MEADOWS 1 SSE 33.0 PINECREST 2 E 32.0 TWIN BRIDGES 2 ESE 26.0 DONNER PEAK 1 W 22.0 SOUTH LAKE 1 NNE 22.0 JUNE MOUNTAIN SKI BASE 18.0 LONE PINE 11 SW 17.0 MAMMOTH MOUNTAIN SKI BASE 16.0 HEAVENLY SKI BASE 12.0 HETCH HETCHY 10 NE 12.0 ...NEVADA... MT CHARLESTON 12.0 MT ROSE SKI BASE 12.0 ...WASHINGTON... LEAVENWORTH 1 NNE 7.0 TWISP 3 SE 5.3 MAZAMA 6 ESE 4.0 ...Selected preliminary Storm Total Rainfall in inches from 700 AM PST Wed Jan 04 through 600 PM PST Sat Jan 08... ...CALIFORNIA... STOUTS MEADOW 9.72 SUGARLOAF 9.70 LAKE COUNTY RAWS 9.27 OAK MOUNTAIN 8.46 HEARST CASTLE 14.2 NW 8.37 PINYON CREEK 8.35 MOUNT SHASTA 7.74 GONZALES 15.5 SW 7.04 OLD MAN MOUNTAIN 6.57 UKIAH MUNICIPAL APT 6.33 HONEYDEW 6.08 SIMS 5.85 FRENCH GULCH 5.60 THREE PEAKS 5.59 SACRAMENTO INTL APT 3.12 SAN FRANCISCO INTL APT 2.84 LOS ANGELES INTL APT 1.78 ...OREGON... LEBANON 7.59 QUAIL PRAIRE LOOKOUT 5.37 CANNIBAL MOUNTAIN 4.30 CEDAR 2.25 ...WASHINGTON... JEFFERSON CREEK 9.67 MOUNT CRAG 5.10 HUMPTULIIPS 4.89 OWL MOUNTAIN 4.32 HUCKLEBERRY RIDGE 2.11 MT. BAKER - HEATHER MEADOWS 1.97 ...Selected preliminary Peak Wind gusts in miles per hour earlier in the event... ...CALIFORNIA... KIRKWOOD MEADOWS 1.2 S 119 GRAPEVINE 3 SSE 104 PULGA 2 NNW 102 PABLO POINT 101 YORKVILLE 5.5 NW 95 CAPETOWN 6 ENE 94 COBB RIDGE WEST 91 ROAD TO RANCHES 90 HIGH GLADE LOOKOUT 89 FERNDALE 6.4 S 88 MAGIC MOUNTAIN TRUCK TRL 87 AMERICAN HOUSE 6 NW 84 AGUA DULCE 8 S 81 BIG BEAR CITY 13 ESE 72 MOUNTAIN GATE 3 NNE 72 CRESCENT CITY 1 ESE 69 JULIAN 9 S 65 BLACK MOUNTAIN 7 E 64 The next powerful Atmospheric River event is forecast to arrive late tonight and continue through Tuesday over California and western Nevada. Additional heavy rainfall, heavy mountain snow, and damaging winds are expected during the event, leading to possible flash flooding and debris flows over burn scar areas. The cumulative effect of successive heavy rain events will lead to additional considerable flood impacts, including rapid water rises and mud slides over northern and central California, as well as far western Nevada. Isolated major river flooding is expected through much of this week, with record high river levels possible. This will be the last Storm Summary issued by the Weather Prediction Center for this event. Please refer to your local National Weather service office for additional information. Russell $$