The first in a series of unusually cold storms moved into the Sierra Nevada on the 15th and persisted through the 16th and into the morning hours of the 17th. This system brought snow to areas above 5500 feet MSL and rain below this level. High winds also preceded the incoming low.

High Wind in GREATER LAKE TAHOE AREA, CALIFORNIA
From 16-MAY-19 01:30:00 to 16-MAY-19 01:31:00 (PST-8)
Magnitude: 85.00 MG
Reported by: Mesonet

Mesonet measured a wind gust of 98 mph atop Ward Mountain (elevation 8483 feet MSL). Several wind gusts over 90 mph were measured the 15th and 16th.

High Wind in GREATER LAKE TAHOE AREA, CALIFORNIA
From 16-MAY-19 15:00:00 to 16-MAY-19 15:01:00 (PST-8)
Magnitude: 83.00 MG
Reported by: Mesonet

Mesonet atop Squaw Summit measured a wind gust of 96 mph (elevation 8700 feet MSL). Several wind gusts over 85 mph were measured the 15th and 16th.

High Wind in MONO, CALIFORNIA
From 15-MAY-19 17:29:00 to 15-MAY-19 17:30:00 (PST-8)
Magnitude: 77.00 MG
Reported by: Mesonet

Mesonet MTH02 atop Mammoth Mountain measured a wind gust of 89 mph (elevation 10067 feet MSL). Several sensors around the mountain reported wind gusts over 80 mph the 15th and the 16th.

Heavy Rain in EL DORADO, CALIFORNIA
From 15-MAY-19 05:00:00 to 16-MAY-19 05:00:00 (PST-8)
Location: POMINS
Reported by: CoCoRaHS

CoCoRaHS Station CA-ED-9, 1 mile south of Tahoma reported 0.72 inches of rainfall over a 24 hour period from 15 May 0500PST to 16 May 0500PST.

Winter Weather in GREATER LAKE TAHOE AREA, CALIFORNIA
From 15-MAY-19 06:00:00 to 17-MAY-19 06:00:00 (PST-8)
Reported by: Public

Above 8000 feet west of California Highway 89, 16 inches of snow fell at Squaw Valley. Near lake level (6350 feet MSL), 7 inches of snow fell at Homewood. At Tahoe City (6230 feet MSL), 3 inches of snow fell.

Heavy Rain in EL DORADO, CALIFORNIA
From 15-MAY-19 05:51:00 to 16-MAY-19 05:51:00 (PST-8)
Location: MEYERS
Reported by: Mesonet

Mesonet station RWBC1 in Meyers reported 0.81 inches of rainfall in a 24 hour period from 15 May 0551PST to 16 May 0551PST. Mesonet elevation 6336 feet MSL.

Heavy Rain in PLACER, CALIFORNIA
From 15-MAY-19 06:00:00 to 16-MAY-19 06:00:00 (PST-8)
Location: TAHOE CITY
Reported by: COOP Observer

Co-Op Observer in Tahoe City measured 0.77 inches of rainfall in a 24 hour period from 15 May 0600PST to 16 May 0600PST. Observer elevation 6230 feet MSL.

Heavy Rain in PLACER, CALIFORNIA
From 15-MAY-19 06:19:00 to 16-MAY-19 06:19:00 (PST-8)
Location: HOMEWOOD
Reported by: Mesonet

Mesonet station HMDC1 in Homewood reported 0.96 inches of rainfall in a 24 hour period from 15 May 0619PST to 16 May 0619PST. Mesonet elevation 7121 feet MSL.

Heavy Rain in PLACER, CALIFORNIA
From 15-MAY-19 07:00:00 to 16-MAY-19 07:00:00 (PST-8)
Location: HOMEWOOD
Reported by: Trained Spotter

Trained Weather Spotter 1 mile northwest of Homewood reported 1.40 inches of rainfall in a 24 hour period from 15 May 0700PST to 16 May 0700PST (elevation 6350 feet MSL).

Heavy Rain in SIERRA, CALIFORNIA
From 15-MAY-19 05:00:00 to 16-MAY-19 05:00:00 (PST-8)
Location: SIERRAVILLE
Reported by: CoCoRaHS

CoCoRaHS Station CA-SI-2, 1 mile southwest of Sierraville reported 0.77 inches of rainfall over a 24 hour period from 15 May 0500PST to 16 May 0500PST.

Heavy Rain in LASSEN, CALIFORNIA
From 15-MAY-19 06:00:00 to 16-MAY-19 06:00:00 (PST-8)
Location: LODGEPOLE
Reported by: Mesonet

Mesonet station BOGC1, Bogard Ranger Station reported 0.87 inches of rainfall in a 24 hour period from 15 May 0600PST to 16 May 0600PST. Mesonet elevation 5673 feet MSL.

Winter Weather in MONO, CALIFORNIA
From 15-MAY-19 05:00:00 to 17-MAY-19 05:00:00 (PST-8)
Reported by: Public

Mammoth Mountain Ski Resort reported 13 inches of snowfall in a 48 hour period from 15 May 0500PST to 17 May 0500PST. Report elevation 11083 feet MSL.