The strongest winter storm of December passed through the region on the final two days of December. This storm initially produced very high snow levels near 9000 feet on 30 December.  Colder air and enhanced forcing, coupled with the final push of extensive moisture worked in unison to rapidly drop snow levels to most valley floors (above 4000 feet) during the morning of New Year's Eve. Although this early change-over to snow reduced the flooding risks, it brought widespread winter travel hazards region-wide. Storm total snow totals ranged from 5��� to around 1 foot for lower elevations of western NV/northeast CA with lesser amounts below 4000 feet in west-central Nevada and areas near the Oregon border. Some foothill areas received 1-2 feet plus with Sierra snowfall totals generally ranging from 18-30 inches below 7000 feet. Higher Sierra areas and passes received 3-4 feet plus above 7000 feet. Liquid equivalent totals were impressive with 4-8��� in the Tahoe basin/parts of eastern CA and over 10��� near the Sierra crest. The Reno Airport���s liquid total of 2.26��� on the 31st was the third wettest calendar day on record.

Heavy Rain in MONO, CALIFORNIA
From 31-DEC-22 00:00:00 to 31-DEC-22 23:59:00 (PST-8)
Location: WALKER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Mesonet station (LOBC1-SNOTEL) located 8.4 mi S of Walker, CA, and mesonet station (SRAC1-SNOTEL) located 2.0 mi SE of Sonora Pass, CA reported 24 hour heavy rainfall totals of 3.6 and 3.4 inches respectively during the period from 12/31/22 through 1/1/23.

High Wind in MONO, CALIFORNIA
From 30-DEC-22 11:50:00 to 30-DEC-22 12:30:00 (PST-8)
Magnitude: 101.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station (MTH03) Mammoth Mountain located 1.7 mi S of the Mammoth Mountain Ski Summit, CA, and mesonet station (DDSUM) located at Conway Summit reported maximum wind gusts of 116 mph and 82mph respectively.

High Wind in GREATER LAKE TAHOE AREA, CALIFORNIA
From 30-DEC-22 16:00:00 to 30-DEC-22 16:30:00 (PST-8)
Magnitude: 139.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public located at the summit of Palisades Tahoe ski resort and Alpine Meadows ski resort reported maximum wind gusts of 160 mph and 152 mph respectively.

Heavy Rain in NEVADA, CALIFORNIA
From 31-DEC-22 00:00:00 to 31-DEC-22 23:59:00 (PST-8)
Location: TRUCKEE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

COCORAHS Station (CA-NV-51) located 2.0 mi N Truckee, CA, and CO-OP observer located 1.0 mi SSW of Boca Reservoir, CA, reported 24 hour heavy rainfall totals of 5.57 and 4.62 inches respectively during the period from 12/31/22 07:00 LST through 1/1/23 07:00 LST.

Heavy Snow in MONO, CALIFORNIA
From 31-DEC-22 00:00:00 to 31-DEC-22 23:59:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public located at Mammoth Mountain Ski base and June Mountain Ski base reported storm total snowfall of 54 and 43 inches respectively during the period from 12/31/22 through 1/1/23.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 31-DEC-22 00:00:00 to 31-DEC-22 23:59:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public located at Homewood Mountain Ski resort, Palisades Tahoe Ski Base, and 1.0 mi SSW of Northstar Ski Base reported storm total snowfall of 54, 47, and 46 inches respectively during the period from 12/31/22 07:00 LST through 1/1/23 07:00 LST.

Heavy Rain in EL DORADO, CALIFORNIA
From 31-DEC-22 00:00:00 to 31-DEC-22 23:59:00 (PST-8)
Location: MEYERS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

COCORAHS  Station (CA-ED-20) located 2.0 mi NW of Meyers, CA, reported 24 hour heavy rainfall total of 8.32 inches during the period from 12/31/22 07:00 LST through 1/1/23 07:00 LST.