A deep shortwave trough moved through the region from early on the 24th through the morning hours of the 25th. This weather system brought moderate to heavy rain in the lower valleys of northeast California and snow to the Sierra Nevada.

Heavy Rain in EL DORADO, CALIFORNIA
From 24-DEC-18 07:00:00 to 25-DEC-18 07:00:00 (PST-8)
Location: LAKE TAHOE ARPT
Reported by: ASOS

ASOS at South Lake Tahoe Airport (KTVL) reported 0.84 inches of rainfall in a 24-hour period from 24 December 0700PST to 25 December 0700PST.

Heavy Rain in EL DORADO, CALIFORNIA
From 24-DEC-18 07:00:00 to 25-DEC-18 07:00:00 (PST-8)
Location: TAHOE PARADISE
Reported by: CoCoRaHS

CoCoRaHS observer CA-ED-20 1 mile northwest of Meyers reported 0.99 inches of rainfall in a 24-hour period from 24 December 0700PST to 25 December 0700PST.

Heavy Rain in LASSEN, CALIFORNIA
From 24-DEC-18 07:00:00 to 25-DEC-18 07:00:00 (PST-8)
Location: MILFORD
Reported by: Mesonet

Mesonet D5597 3 miles east-southeast of Honey Lake reported 0.71 inches of rainfall in a 24-hour period from 24 December 0700PST to 25 December 0700PST.

Heavy Rain in LASSEN, CALIFORNIA
From 24-DEC-18 07:00:00 to 24-DEC-18 07:00:00 (PST-8)
Location: SUSANVILLE
Reported by: CoCoRaHS

CoCoRaHS observer CA-LS-1 3 miles south-southwest of Susanville reported 0.81 inches of rainfall in a 24-hour period from 24 December 0700PST to 25 December 0700PST.

Heavy Rain in LASSEN, CALIFORNIA
From 24-DEC-18 07:00:00 to 25-DEC-18 07:00:00 (PST-8)
Location: HALLS FLAT
Reported by: Mesonet

Mesonet station BKMC1 22 miles south-southeast of Pittville reported 0.84 inches of precipitation within a 24-hour period from 24 December 0700PST to 25 December 0700PST. Mesonet elevation 6008 feet MSL.

Heavy Rain in MODOC, CALIFORNIA
From 24-DEC-18 06:00:00 to 25-DEC-18 06:00:00 (PST-8)
Location: CEDARVILLE ARPT
Reported by: Mesonet

Mesonet station CEDC, 3 miles north of Cedarville reported 0.67 inches of rainfall from 24 December 0600PST to 25 December 0600PST. Mesonet elevation 4600 feet MSL.

Heavy Rain in PLUMAS, CALIFORNIA
From 24-DEC-18 07:00:00 to 25-DEC-18 07:00:00 (PST-8)
Location: GENESEE
Reported by: Mesonet

Mesonet station ANTC1 near Antelope Lake reported 1.16 inches of rainfall in a 24-hour period from 24 December 0700PST to 25 December 0700PST. Mesonet elevation 5026 feet MSL.

Heavy Rain in SIERRA, CALIFORNIA
From 24-DEC-18 06:00:00 to 25-DEC-18 06:00:00 (PST-8)
Location: SIERRAVILLE DRWTR AR
Reported by: COOP Observer

CO-OP Observer SERC1 at the Sierraville Ranger Station reported 0.83 inches of rainfall in a 24-hour period from 24 December 0600PST to 25 December 0600PST. Elevation 4975 feet MSL.

Heavy Rain in SIERRA, CALIFORNIA
From 24-DEC-18 07:00:00 to 25-DEC-18 07:00:00 (PST-8)
Location: PEAVINE
Reported by: Mesonet

Mesonet station STPC1 1-mile east-southeast of Stampede Reservoir reported 1.13 inches of rainfall in a 24-hour period from 24 December 0700PST to 25 December 0700PST. Mesonet elevation 5735 feet MSL.

Heavy Rain in LASSEN, CALIFORNIA
From 24-DEC-18 07:00:00 to 25-DEC-18 07:00:00 (PST-8)
Location: HALLS FLAT
Reported by: Mesonet

Mesonet station BKMC1 Blacks Mountain reported 0.84 inches of rainfall in a 24-hour period from 24 December 0700PST to 25 December 0700PST.

Heavy Rain in NEVADA, CALIFORNIA
From 24-DEC-18 07:00:00 to 25-DEC-18 07:00:00 (PST-8)
Location: FLONSTON
Reported by: Mesonet

Mesonet FARC1 2 miles northwest of Floriston reported 1.30 inches of rainfall over a 24-hour period from 24 December 0700PST to 25 December 0700PST.

Heavy Rain in NEVADA, CALIFORNIA
From 24-DEC-18 07:00:00 to 25-DEC-18 07:00:00 (PST-8)
Location: NORDEN
Reported by: Mesonet

Mesonet DNRC1 near Donner Lake reported 1.37 inches of rainfall over a 24-hour period from 24 December 0700PST to 25 December 0700PST.

Heavy Rain in PLUMAS, CALIFORNIA
From 24-DEC-18 07:00:00 to 25-DEC-18 07:00:00 (PST-8)
Location: CLIO
Reported by: Mesonet

Mesonet MWKC1 1 mile east of Blairsden reported 0.76 inches of rainfall over a 24-hour period from 24 December 0700PST to 25 December 0700PST.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 24-DEC-18 07:00:00 to 25-DEC-18 07:00:00 (PST-8)
Reported by: Public

Twenty-four-hour snowfall amounts ranged from 6 inches at lake level in the Tahoe Basin to as much as a 10-12 inches (Squaw Valley and Northstar Ski Resorts) at the higher elevations around Lake Tahoe.

Winter Weather in MONO, CALIFORNIA
From 24-DEC-18 18:00:00 to 25-DEC-18 22:00:00 (PST-8)
Reported by: Public

Southern Mono County received light snow accumulations during this storm. Totals ranged from 2.5 inches 1 mile southwest of Toms Place to 4-5 inches within the town of Mammoth Lakes.

Heavy Rain in NEVADA, CALIFORNIA
From 24-DEC-18 07:00:00 to 25-DEC-18 07:00:00 (PST-8)
Location: (TRK)TRUCKEE/TAHOE A
Reported by: Mesonet

Mesonet MTSC1 2 miles southwest of Glenshire-Devonshire reported 0.89 inches of rainfall over a 24-hour period from 24 December 0700PST to 25 December 0700PST.