Very cold low pressure dropped south along the Pacific Northwest coast and into the northern Sierra between the 18th and the 21st followed by another low on the 23rd. This brought gusty winds and periods of heavy snow to northeast California and the Sierra.

Winter Storm in GREATER LAKE TAHOE AREA, CALIFORNIA
From 19-NOV-10 19:00:00 to 21-NOV-10 12:00:00 (PST-8)
Crop damage: 0.00K
Reported by: Mesonet

Snow with this storm came in two waves, one from the evening of the 19th to the morning of the 20th and the second about 24 hours later. Widespread storm total snowfall of 2 to 3 feet were reported around Lake Tahoe, with local amounts to 4 feet near the crest.  In addition to heavy snow, winds gusted to between 35 and 45 mph especially on the 18th and 19th.

Heavy Snow in LASSEN/EASTERN PLUMAS/EASTERN SIERRA, CALIFORNIA
From 19-NOV-10 15:00:00 to 21-NOV-10 10:00:00 (PST-8)
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall with this system fell in two increments, one from the evening of the 19th through the morning of the 20th and the other about 24 hours later. Widespread storm totals of 6 to 12 inches were reported near and west of highway 395 south and west of Susanville, with 15 inches in Portola.

Winter Weather in SURPRISE VALLEY, CALIFORNIA
From 21-NOV-10 10:00:00 to 22-NOV-10 10:00:00 (PST-8)
Crop damage: 0.00K
Reported by: COOP Observer

Up to 3 inches of snowfall (based on precipitation estimates from Cedarville and Alturas) fell with on the 21st and 22nd with the heaviest amount in the afternoon and evening of the 21st. Isolated higher amounts fell, with Cedarville reporting 5 inches.

Winter Weather in GREATER LAKE TAHOE AREA, CALIFORNIA
From 21-NOV-10 19:00:00 to 22-NOV-10 08:00:00 (PST-8)
Crop damage: 0.00K
Reported by: Mesonet

A widespread 6 to 8 inches of snow fell in the valleys with 10 to 16 inches near the Sierra crest. In addition to snow, wind gusts of 25 to 35 mph were common on the evening of the 19th.

Heavy Snow in LASSEN/EASTERN PLUMAS/EASTERN SIERRA, CALIFORNIA
From 23-NOV-10 00:00:00 to 23-NOV-10 13:00:00 (PST-8)
Crop damage: 0.00K
Reported by: Mesonet

The main brunt of the snowfall with this disturbance was south and west of Susanville. Snowfall totals include: Portola with 4 inches, Grizzly Ridge HADS with an estimated 8 to 12 inches, and and estimated 10 inches at the Independence Creek SNOTEL.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 23-NOV-10 00:00:00 to 23-NOV-10 16:00:00 (PST-8)
Crop damage: 0.00K
Reported by: ASOS

Snowfall totals with this system include: 14 to 20 inches at Squaw Valley and Alpine Meadows Ski areas near the Sierra crest, 16 inches at the South Lake Tahoe Airport, and 12 inches at the Truckee Airport and also at Carnelian Bay on the north side of Lake Tahoe.

Winter Storm in MONO, CALIFORNIA
From 19-NOV-10 14:00:00 to 21-NOV-10 05:00:00 (PST-8)
Crop damage: 0.00K
Reported by: Mesonet

There were 2 main periods of snow with this slow moving storm, with one period from late evening on the 19th to the morning of the 20th and the second period about 24 hours later. Much more snow fell west of highway 395 than along and east, with storm totals of 2.5 to 3.5 feet near the Sierra crest and only 6 to 12 inches along and east of highway 395.  In addition to snowfall, winds were gusting 35 to 50 mph on the 19th with a few gusts over 60 mph from 1400PST to 1700PST for Walker RAWS. Finally, a man was killed near Mammoth Lakes when his vehicle went off a road in low visibility conditions due to heavy snow.