####018004925#### ACUS42 KWBC 311459 SCCNS2 Storm Summary Number 1 for West Coast to Northern High Plains Storm System NWS Weather Prediction Center College Park MD 700 AM PST Sat Dec 31 2022 ...A plume of moisture continues to produce moderate to heavy rainfall across lower elevations of northern California, with higher elevation snow in the northern Sierra Nevada Range... Winter Storm Warnings are in effect for the Sierra Nevada Range, northeastern Utah, southeastern Idaho, the Wasatch Mountains, the northern Mongollan Rim, the Colorado Rockies, and much of central Wyoming. High Wind Warnings are in effect for California's Transverse Ranges and southeastern Wyoming. Winter Storm Watches are in effect for western New Mexico, southwestern Wyoming, northeastern Colorado, and portions of the northern High Plains. Flash Flood Watches are in effect for California's Central Valley & northern coast and north-central Nevada. Winter Weather Advisories are in effect for northwestern California, much of central Nevada, central & southern Idaho, eastern facing slopes of Utah's Wasatch Mountain Range, southern portion of the Mongollan Rim, central Colorado, and much of west-central Wyoming. Wind Advisories are in effect for southern California and Nevada, the Sangre de Cristo Mountains of New Mexico, and western Texas. For a detailed graphical depiction of the latest watches, warnings and advisories, please see www.weather.gov At 600 AM PST...A storm system continued to move inland across northern California and the Great Basin region, with a frontal boundary analyzed moving south through the region. Continued onshore flow was producing an axis of moderate to heavy rainfall stretching from San Francisco eastward through the northern Central Valley and into the northern Sierra Nevada Range, where high snow levels (>8500ft) have kept snowfall confined to mountain peaks. Furthermore, impressive wind gusts across both California and extreme western Nevada have been reported as a result of the tightening surface pressure gradient and strong low-level winds mixing down. ...Selected preliminary Storm Total Rainfall in inches from 400 AM PST Tue Dec 30 through 600 AM PST Sat Dec 31... ...CALIFORNIA... HOMEWOOD 8.67 BLUE CANYON NYACK AIRPORT 7.37 LAYTONVILLE 9.8 NNW 6.18 SOUTH FORK EEL RIVER AT LEGGETT 5.44 STEELY FORK 4.87 BEN LOMOND 4.55 KNEELAND 3.33 ...Selected preliminary Peak Wind gusts in miles per hour earlier in the event... ...CALIFORNIA... MAMMOTH MOUNTAIN 116 HEAVENLY SKI SUMMIT 1 NNW 99 JAWBONE 70 BIRD SPRINGS PASS 66 HORSE THIEF SPRINGS 61 MAMMOTH YOSETIME AIRPORT 47 ...NEVADA... HAWTHORNE 6 NW 93 YERINGTON 5 ENE 64 RENO 2 NW 55 Moderate to heavy preciptation will continue to fall across California over the next 24 hours, with the heaviest axis shifting southward through the afternoon. Widespread areal average totals of 1-2"+ are possible throughout nearly the entierty of the state, with localized 2-6"+ totals on Pacific-facing mountain slopes, especially along the Sierra Nevada Range and Tranverse Mountains. As the system continues to push southward and more inland, precipitation will expand into the Great Basin this afternoon, before the region begins to dry out on New Year's Day. Snowfall will continue to be confined to the highest elevations of California (>8500ft), however, several feet of snow remains possible along southern peaks of the Sierra Nevada Range, with lesser amounts possible (1-2 feet) in higher elevations of the Great Basin, Wasatch Mountains, and Tetons through tomorrow morning. As the system tracks through the Intermountain West on New Year's Day, valley rainfall and higher-elevation snow will expand into the Southwest and southern & central Rockies, before the system moves out of the Rockies on Monday and intensifies as it pushes into the central and northern Plains. The next Storm Summary will be issued by the Weather Prediction Center at 700 PM PST. Please refer to your local National Weather Service office for additional information on this event. Russell $$