A fast-moving, but strong, storm pushed into the Sierra Nevada the morning of the 20th. Gusty winds developed ahead of the area of low pressure. Moderate to heavy precipitation developed over the Sierra and northeast California as the low moved into the region.

High Wind in GREATER LAKE TAHOE AREA, CALIFORNIA
From 20-JAN-19 18:00:00 to 20-JAN-19 18:01:00 (PST-8)
Magnitude: 109.00 MG
Reported by: Mesonet

Mesonet measured sustained winds of 90 mph gusting to 126 mph atop Ward Mountain (elevation 8483 feet MSL).

High Wind in GREATER LAKE TAHOE AREA, CALIFORNIA
From 20-JAN-19 16:15:00 to 20-JAN-19 16:16:00 (PST-8)
Magnitude: 99.00 MG
Reported by: Mesonet

Mesonet measured sustained winds of 72 mph gusting to 114 mph atop Squaw Summit (elevation 8700 feet MSL).

High Wind in GREATER LAKE TAHOE AREA, CALIFORNIA
From 20-JAN-19 17:45:00 to 20-JAN-19 17:46:00 (PST-8)
Magnitude: 50.00 MG
Reported by: Mesonet

Mesonet station SCTAM near Alpine Meadows measured a 58 mph wind gust. Mesonet elevation 8120 feet MSL.

Heavy Snow in MONO, CALIFORNIA
From 20-JAN-19 07:33:00 to 21-JAN-19 07:33:00 (PST-8)
Reported by: Public

June Mountain Ski Area reported 12 inches of snowfall at an elevation of 7545 feet MSL in a 24 hour period from 20 January 0733PST to 21 January 0733PST.

Heavy Snow in MONO, CALIFORNIA
From 20-JAN-19 07:00:00 to 21-JAN-19 07:00:00 (PST-8)
Reported by: Mesonet

Mesonet station VGAC1 3 miles west-southwest of Conway Summit reported 10 inches of snowfall at an elevation of 9409 feet MSL in a 24 hour period from 20 January 0700PST to 21 January 0700PST.

Heavy Snow in MONO, CALIFORNIA
From 20-JAN-19 07:00:00 to 21-JAN-19 07:00:00 (PST-8)
Reported by: Public

Mammoth Mountain Ski Area reported 10 inches of snow at an elevation of 7953 feet MSL in a 24 hour period from 20 January 0700PST to 21 January 0700PST.

Winter Weather in LASSEN/EASTERN PLUMAS/EASTERN SIERRA, CALIFORNIA
From 20-JAN-19 07:00:00 to 21-JAN-19 07:00:00 (PST-8)
Reported by: Trained Spotter

A trained weather spotter 5 miles west-northwest of Susanville (elevation 5072 feet MSL) and a CoCoRaHS observer 1 mile southwest of Sierraville reported 6.5 inches and 5.0 inches of snow in a 24 hour period from 20 January 0700PST to 21 January 0700PST, respectively.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 20-JAN-19 07:00:00 to 21-JAN-19 07:00:00 (PST-8)
Reported by: Public

Snowfall amounts between 7 and 13 inches fell near and west of California Highway 89 between the 20th and 21st, with 16 to 20 inches falling above 7000 feet MSL. Below 7000 feet MSL east of California Highway 89 and south of Interstate 80, between 3.5 and 16 inches of snow fell. South of US Highway 50, 4.5 inches of snow fell at Meyers and 18 inches of snow fell at Heavenly Ski Resort. In Alpine County, between 10 to 11 inches of snow fell above 8000 feet MSL.

High Wind in SURPRISE VALLEY, CALIFORNIA
From 20-JAN-19 07:39:00 to 20-JAN-19 07:40:00 (PST-8)
Magnitude: 53.00 MG
Reported by: Mesonet

Mesonet station SSYC1 3 miles east-southeast of Lake City measured a 61 mph wind gust. Mesonet elevation 4591 feet MSL.

Heavy Snow in MONO, CALIFORNIA
From 20-JAN-19 19:00:00 to 21-JAN-19 07:00:00 (PST-8)
Reported by: Trained Spotter

Trained weather spotter 1 mile southwest of Toms Place reported 10 inches of snowfall with a liquid water equivalent of 0.7 inches over a 12 hour period from 20 January 1900PST to 21 January 0700PST. Spotter elevation 7199 feet MSL.