A slow moving upper level low dug into the western CONUS the 13th and moved inland over northern California and Nevada by the 17th. Shortwaves embedded in this low initially brought rain and high elevation snow to the Sierra Nevada and eastern California. Colder air beneath the upper low allowed snow levels to fall, bringing widespread snow to the Sierra and eastern California by the 16th.

Heavy Rain in ALPINE, CALIFORNIA
From 13-MAR-18 11:48:00 to 14-MAR-18 04:58:00 (PST-8)
Location: MARKLEEVILLE
Reported by: Mesonet

Mesonet station MKEC1, Markleeville reported 0.63 inches of rain from 13 March 1148PST to 14 March 0448PST.

Heavy Rain in PLACER, CALIFORNIA
From 13-MAR-18 07:00:00 to 14-MAR-18 04:00:00 (PST-8)
Location: TAHOE CITY
Reported by: Mesonet

Mesonet station THOC1, Tahoe City reported 0.70 inches of rain from 13 March 0700PST to 14 March 0400PST.

Heavy Rain in ALPINE, CALIFORNIA
From 13-MAR-18 07:00:00 to 14-MAR-18 04:00:00 (PST-8)
Location: LOOPE
Reported by: Mesonet

Mesonet station MNPC1, 1 mile southeast of Monitor Pass recorded 0.70 inches of rain from 13 March 1600PST to 14 March 0400PST.

Heavy Rain in PLUMAS, CALIFORNIA
From 13-MAR-18 14:00:00 to 14-MAR-18 05:00:00 (PST-8)
Location: PORTOLA
Reported by: Mesonet

Mesonet station DVSC1, Lake Davis reported 0.75 inches of rain from 13 March 1400PST to 14 March 0500PST.

Heavy Rain in MONO, CALIFORNIA
From 13-MAR-18 17:00:00 to 14-MAR-18 04:00:00 (PST-8)
Location: WALKER
Reported by: Mesonet

Mesonet station LOBC1, 8 miles southeast of Walker reported 0.80 inches of rain from 13 March 1700PST to 14 March 0400PST.

Heavy Rain in EL DORADO, CALIFORNIA
From 13-MAR-18 14:00:00 to 14-MAR-18 04:00:00 (PST-8)
Location: TAHOE PARADISE
Reported by: Mesonet

Mesonet station HGNC1, 3 miles east of Meyers reported 0.60 inches of rain from 13 March 1400PST to 14 March 0400PST.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 15-MAR-18 08:37:00 to 16-MAR-18 08:37:00 (PST-8)
Reported by: Public

Alpine Meadows Ski Resort reported 24.0 inches of snow from 15 March 0837PST to 16 March 0837PST at an elevation of 8000 feet.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 15-MAR-18 08:34:00 to 16-MAR-18 08:34:00 (PST-8)
Reported by: Public

Northstar Ski Resort reported 26.0 inches of snow from 15 March 0834PST to 16 March 0834PST at an elevation of 8610 feet.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 15-MAR-18 09:01:00 to 16-MAR-18 09:01:00 (PST-8)
Reported by: Public

Heavenly Ski Resort reported 28.0 inches of heavy snow from 15 March 0901PST to 16 March 0901PST at an elevation of 9150-9600 feet.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 16-MAR-18 10:52:00 to 17-MAR-18 10:52:00 (PST-8)
Reported by: COOP Observer

CO-OP observer in Tahoma measured 15.0 inches of heavy snow from 16 March 1052PST to 17 March 1052PST with a water equivalent of 1.11 inches. Storm total snowfall of 52.4 inches since 14 March.

Heavy Rain in EL DORADO, CALIFORNIA
From 13-MAR-18 13:15:00 to 14-MAR-18 03:53:00 (PST-8)
Location: (TVL)TAHOE VLY
Reported by: ASOS

ASOS TVL, South Lake Tahoe Airport reported 0.86 inches of rain from 13 March 1315PST to 14 March 0353PST.

Heavy Rain in MONO, CALIFORNIA
From 13-MAR-18 09:00:00 to 14-MAR-18 04:00:00 (PST-8)
Location: WALKER
Reported by: Mesonet

Mesonet station SRAC1, Sonora Pass reported 1.00 inch of rain from 13 March 0900PST to 14 March 0400PST.

Heavy Rain in MONO, CALIFORNIA
From 13-MAR-18 09:00:00 to 14-MAR-18 04:00:00 (PST-8)
Location: WALKER
Reported by: Mesonet

Mesonet station SRAC1, Sonora Pass reported 1.00 inch of rain from 13 March 0900PST to 14 March 0400PST.

Heavy Rain in EL DORADO, CALIFORNIA
From 13-MAR-18 13:00:00 to 14-MAR-18 04:00:00 (PST-8)
Location: VADE
Reported by: Mesonet

Mesonet station ECOC1, Echo Peak reported 1.40 inches of rain from 13 March 1300PST to 14 March 0400PST.

Heavy Rain in NEVADA, CALIFORNIA
From 13-MAR-18 03:45:00 to 14-MAR-18 05:00:00 (PST-8)
Location: NORDEN
Reported by: Mesonet

Mesonet station DNRC1, Donner Lake reported 1.01 inches of rain from 13 March 0345PST to 14 March 0500PST.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 14-MAR-18 09:38:00 to 17-MAR-18 09:38:00 (PST-8)
Reported by: COOP Observer

CO-OP observer 1 mile south-southwest of Boca Reservoir measured a storm total snowfall of 32.5 inches since 14 March 0938PST.

Heavy Snow in LASSEN/EASTERN PLUMAS/EASTERN SIERRA, CALIFORNIA
From 14-MAR-18 10:57:00 to 17-MAR-18 10:57:00 (PST-8)
Reported by: COOP Observer

CO-OP observer in Verdi measured 29.0 inches of storm total snowfall since 14 March 1057PST.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 16-MAR-18 10:50:00 to 17-MAR-18 10:50:00 (PST-8)
Reported by: COOP Observer

CO-OP observer in Tahoe City measured 22.0 inches of heavy snow from 16 March 1050PST to 17 March 1050PST with a water equivalent of 1.44 inches. Storm total snowfall of 56.0 inches since 14 March.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 16-MAR-18 10:55:00 to 17-MAR-18 10:55:00 (PST-8)
Reported by: COOP Observer

CO-OP observer at the Truckee Airport measured 14.0 inches of heavy snow from 16 March 1055PST to 17 March 1055PST with a water equivalent of 0.94 inches. Storm total snowfall of 35 inches since 14 March.

Heavy Snow in LASSEN/EASTERN PLUMAS/EASTERN SIERRA, CALIFORNIA
From 15-MAR-18 11:13:00 to 17-MAR-18 11:13:00 (PST-8)
Reported by: Trained Spotter

Trained weather spotter 1 mile north-northwest of Portola measured a storm total snowfall of 14.5 inches from 15 March 1113PST to 17 March 1113PST.

Heavy Snow in MONO, CALIFORNIA
From 14-MAR-18 11:28:00 to 17-MAR-18 11:28:00 (PST-8)
Reported by: COOP Observer

CO-OP observer in Mammoth Lakes measured 16.2 inches of storm total snowfall since 14 March 1128PST.

Heavy Rain in SIERRA, CALIFORNIA
From 13-MAR-18 04:00:00 to 14-MAR-18 05:00:00 (PST-8)
Location: PEAVINE
Reported by: Mesonet

Mesonet station STPC1, 1 mile east-southeast of Stampede Reservoir reported 0.56 inches of rain from 13 March 0400PST to 14 March 0500PST.

Heavy Rain in SIERRA, CALIFORNIA
From 13-MAR-18 04:00:00 to 14-MAR-18 05:00:00 (PST-8)
Location: SIERRAVILLE DRWTR AR
Reported by: COOP Observer

CO-OP observer station SERC1, Sierraville Ranger Station reported 0.57 inches of rain from 13 March 0400PST to 14 March 0500PST.

Heavy Rain in LASSEN, CALIFORNIA
From 13-MAR-18 04:00:00 to 14-MAR-18 05:10:00 (PST-8)
Location: MILFORD
Reported by: Mesonet

Mesonet station LAFC1, 6 miles south of Honey Lake reported 0.60 inches of rain from 13 March 0400PST to 14 March 0510PST.

Heavy Rain in LASSEN, CALIFORNIA
From 13-MAR-18 08:15:00 to 13-MAR-18 20:15:00 (PST-8)
Location: (SVE)SUSANVILLE MUNI
Reported by: Trained Spotter

Trained weather spotter 6 miles south-southeast of Susanville reported 1.08 inches of rain from 0815PST to 2015PST 13 March.

Heavy Rain in ALPINE, CALIFORNIA
From 13-MAR-18 03:00:00 to 14-MAR-18 04:00:00 (PST-8)
Location: SORENSENS
Reported by: Mesonet

Mesonet station FDCC1, 1 mile east-southeast of Carson Pass reported 1.20 inches of rain from 13 March 0300PST to 14 March 0400PST.

Heavy Snow in LASSEN/EASTERN PLUMAS/EASTERN SIERRA, CALIFORNIA
From 15-MAR-18 19:34:00 to 16-MAR-18 07:34:00 (PST-8)
Reported by: Trained Spotter

Trained weather spotter 6 miles west-northwest of Susanville measured 9.0 inches of heavy snow from 15 March 1934PST to 16 March 0734PST.

Heavy Snow in LASSEN/EASTERN PLUMAS/EASTERN SIERRA, CALIFORNIA
From 15-MAR-18 20:21:00 to 16-MAR-18 08:21:00 (PST-8)
Reported by: Trained Spotter

Trained weather spotter 1 mile north-northwest of Portola measured 10.5 inches of heavy snow from 15 March 2021PST to 16 March 0821PST.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 15-MAR-18 08:11:00 to 16-MAR-18 08:11:00 (PST-8)
Reported by: COOP Observer

Truckee Airport Official Observer measured 17.0 inches of heavy snow from 15 March 0811PST to 16 March 0811PST. Water equivalent of 1.39 inches.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 15-MAR-18 08:46:00 to 16-MAR-18 08:46:00 (PST-8)
Reported by: COOP Observer

Observer in Tahoma reported 17.5 inches of heavy snow from 15 March 0846PST to 16 March 0846PST. Water equivalent of 1.68 inches.

Heavy Snow in LASSEN/EASTERN PLUMAS/EASTERN SIERRA, CALIFORNIA
From 15-MAR-18 19:22:00 to 16-MAR-18 07:22:00 (PST-8)
Reported by: Trained Spotter

Trained weather spotter 2 miles northwest of Doyle measured 11.5 inches of heavy snow from 15 March 1922PST to 16 March 0722PST.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 15-MAR-18 07:56:00 to 16-MAR-18 07:56:00 (PST-8)
Reported by: COOP Observer

CO-OP observer in Tahoe City measured 20.0 inches of heavy snow from 15 March 0756PST to 16 March 0756PST. Water equivalent of 1.72 inches.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 15-MAR-18 07:54:00 to 16-MAR-18 07:54:00 (PST-8)
Reported by: COOP Observer

CO-OP observer 1 mile south-southwest of Boca Reservoir measured 20.5 inches of heavy snow from 15 March 0754PST to 16 March 0754PST. Water equivalent of 1.87 inches.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 15-MAR-18 08:02:00 to 16-MAR-18 08:02:00 (PST-8)
Reported by: COOP Observer

CO-OP observer 2 miles south-southeast of Dog Valley measured 22.0 inches of heavy snow from 15 March 0802PST to 16 March 0802PST. Water equivalent 1.69 inches.