The first part of this storm consisted of warm air advection precipitation that spread through the northern Sierra. Moist upslope flow brought precipitation into Mono County at the same time. The second part of this storm moved into the Sierra Nevada on the 21st and 22nd in the form of a fairly significant atmospheric river, tapping a deep plume of moisture moving in from the Eastern Pacific.

Heavy Rain in EL DORADO, CALIFORNIA
From 20-MAR-18 06:00:00 to 23-MAR-18 06:00:00 (PST-8)
Location: MEEKS BAY
Reported by: Mesonet

Mesonet station RUBC1 near Meeks Bay reported 4.80 inches of storm total rainfall from 20 March 0600PST to 23 March 0600PST.

Heavy Rain in ALPINE, CALIFORNIA
From 20-MAR-18 06:48:00 to 23-MAR-18 06:48:00 (PST-8)
Location: MARKLEEVILLE
Reported by: Mesonet

Mesonet station MKEC1 near Markleeville, reported 3.64 inches of storm total rainfall from 20 March 0648PST to 23 March 0648PST.

Avalanche in MONO, CALIFORNIA
From 22-MAR-18 11:00:00 to 22-MAR-18 11:01:00 (PST-8)
Reported by: Public

Avalanche occurred on McGee Mountain near mid-day. The slide traveled approximately 1700 feet through sagebrush and was 12-15 feet high in places. No people were reported trapped or injured.

Heavy Snow in MONO, CALIFORNIA
From 21-MAR-18 18:00:00 to 22-MAR-18 12:00:00 (PST-8)
Reported by: Other Federal Agency

Military Unit operating at 8400 feet above the Marine Corps Mountain Warfare Training Center received 34.0 inches of snow from 21 March 1800PST to 22 March 1200PST.

Flood in EL DORADO, CALIFORNIA
From 22-MAR-18 16:00:00 to 23-MAR-18 23:59:00 (PST-8)
Location: SOUTH LAKE TAHOE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Tahoe Daily Tribune reported that heavy rainfall caused flooding at two residences in South Lake Tahoe along Bill Avenue on 22 March. No damage estimates were available.

Heavy Snow in MONO, CALIFORNIA
From 21-MAR-18 06:00:00 to 22-MAR-18 06:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Mammoth Mountain Ski Area reported 40.0 to 48.0 inches of snowfall from 21 March 0600PST to 22 March 0600PST.

Heavy Rain in SIERRA, CALIFORNIA
From 20-MAR-18 16:30:00 to 22-MAR-18 16:30:00 (PST-8)
Location: SATTLEY
Reported by: Trained Spotter

Trained weather spotter 1 mile south of Sattley reported 5.80 inches of rainfall from 20 March 1630PST to 22 March 1630PST. Before the 48-hour period, there was a foot of snow on the ground, which almost completely melted.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 22-MAR-18 02:05:00 to 23-MAR-18 02:05:00 (PST-8)
Reported by: Public

Twenty-six inches of snowfall was reported at Squaw Valley Ski Resort from 22 March 0205PST to 23 March 0205PST. The report was made at an elevation of 8200 feet.

Heavy Snow in MONO, CALIFORNIA
From 22-MAR-18 05:57:00 to 23-MAR-18 05:57:00 (PST-8)
Reported by: Public

June Mountain Ski Area measured 72.0 inches of heavy snow from 22 March 0557PST to 23 March 0557PST.

Heavy Snow in MONO, CALIFORNIA
From 22-MAR-18 02:56:00 to 23-MAR-18 02:56:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Mammoth Mountain Ski Resort measured 70.0 inches of snow from 22 March 0256PST to 23 March 0256PST.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 21-MAR-18 05:51:00 to 23-MAR-18 05:51:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Northstar Ski Resort reported 31.0 inches of snowfall from 21 March 0551PST to 23 March 0551PST.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 21-MAR-18 02:59:00 to 23-MAR-18 02:59:00 (PST-8)
Reported by: Public

Heavenly Ski Resort reported 29.0 inches of snowfall from 21 March 0259PST to 23 March 0259PST.

Heavy Rain in PLACER, CALIFORNIA
From 20-MAR-18 11:33:00 to 23-MAR-18 11:33:00 (PST-8)
Location: HOMEWOOD
Reported by: Public

Public in Homewood measured 5.30 inches of storm total rainfall from 20 March 1133PST to 23 March 1133PST. 0.89 inches of that rainfall fell from 22 March 1133PST to 23 March 1133PST.

Heavy Rain in LASSEN, CALIFORNIA
From 20-MAR-18 11:29:00 to 23-MAR-18 11:29:00 (PST-8)
Location: SUSANVILLE
Reported by: Trained Spotter

Trained weather spotter 6 miles west-northwest of Susanville reported storm total rainfall of 4.52 inches from 20 March 1129PST to 23 March 1129PST.

Heavy Rain in SIERRA, CALIFORNIA
From 20-MAR-18 06:49:00 to 23-MAR-18 06:49:00 (PST-8)
Location: PEAVINE
Reported by: Mesonet

Mesonet station DOGC1, Dog Valley, reported a storm total rainfall of 3.41 inches from 20 March 0649PST to 23 March 0649PST.

Heavy Rain in LASSEN, CALIFORNIA
From 20-MAR-18 07:00:00 to 23-MAR-18 07:00:00 (PST-8)
Location: JOHNSTONVILLE
Reported by: Mesonet

Mesonet station D2000, 3 east-southeast of Susanville reported 1.49 inches of storm total rainfall from 20 March 0700PST to 23 March 0700PST.

Heavy Rain in MONO, CALIFORNIA
From 20-MAR-18 06:46:00 to 23-MAR-18 06:46:00 (PST-8)
Location: MAMMOTH LAKES
Reported by: Mesonet

Mesonet station D5868, 1 mile southwest of Mammoth Lakes reported 1.21 inches of storm total rainfall from 20 March 0646PST to 23 March 0646PST.

Heavy Rain in PLACER, CALIFORNIA
From 20-MAR-18 06:57:00 to 23-MAR-18 06:57:00 (PST-8)
Location: BIG CHIEF
Reported by: Mesonet

Mesonet station D9019 at Squaw Valley reported 4.12 inches of storm total rainfall from 20 March 0657PST to 23 March 0657PST.

Heavy Rain in MONO, CALIFORNIA
From 20-MAR-18 06:04:00 to 23-MAR-18 06:04:00 (PST-8)
Location: TOMS PLACE
Reported by: Mesonet

Mesonet station RCEC1 at Toms Place reported 1.55 inches of storm total rainfall from 20 March 0604PST to 23 March 0604PST.

Heavy Rain in MONO, CALIFORNIA
From 20-MAR-18 06:00:00 to 23-MAR-18 06:00:00 (PST-8)
Location: WALKER
Reported by: Mesonet

Mesonet station LVTC1, Leavitt Meadows reported 5.20 inches of storm total rainfall from 20 March 0600PST to 23 March 0600PST.

Heavy Rain in SIERRA, CALIFORNIA
From 20-MAR-18 06:33:00 to 23-MAR-18 06:33:00 (PST-8)
Location: PEAVINE
Reported by: Mesonet

Mesonet station SMDC1, 2 miles east of Stampede Reservoir reported 1.48 inches of storm total rainfall from 20 March 0633PST to 23 March 0633PST.

Heavy Rain in SIERRA, CALIFORNIA
From 20-MAR-18 06:30:00 to 23-MAR-18 06:30:00 (PST-8)
Location: SIERRAVILLE DRWTR AR
Reported by: Mesonet

Mesonet station RNYC1, 4 miles south-southeast of Sierraville reported 1.87 inches of storm total rainfall from 20 March 0630PST to 23 March 0630PST.

Heavy Rain in EL DORADO, CALIFORNIA
From 20-MAR-18 06:51:00 to 23-MAR-18 06:51:00 (PST-8)
Location: MEYERS
Reported by: Mesonet

Mesonet station RWBC1 near Meyers reported 5.55 inches of storm total rainfall from 20 March 0651PST to 23 March 0651PST.

Heavy Rain in ALPINE, CALIFORNIA
From 20-MAR-18 06:00:00 to 23-MAR-18 06:00:00 (PST-8)
Location: SORENSENS
Reported by: Mesonet

Mesonet station TEM13, 4 miles northeast of Hope Valley reported 2.90 inches of storm total rainfall from 20 March 0600PST to 23 March 0600PST.

Heavy Rain in MONO, CALIFORNIA
From 20-MAR-18 06:12:00 to 23-MAR-18 06:12:00 (PST-8)
Location: TOMS PLACE
Reported by: Mesonet

Mesonet station TS037, 3 northeast of Toms Place reported 1.28 inches of storm total rainfall from 20 March 0612PST to 23 March 0612PST.

Heavy Rain in MONO, CALIFORNIA
From 20-MAR-18 06:00:00 to 23-MAR-18 06:00:00 (PST-8)
Location: WALKER
Reported by: Mesonet

Mesonet station LELC1, 3 miles south-southeast of Sonora Pass reported 1.50 inches of storm total rainfall from 20 March 0600PST to 23 March 0600PST.

Heavy Rain in MONO, CALIFORNIA
From 20-MAR-18 07:00:00 to 23-MAR-18 07:00:00 (PST-8)
Location: BENTON
Reported by: Mesonet

Mesonet station BETC1, 1 mile north of Benton reported 1.02 inches of storm total rainfall from 20 March 0700PST to 23 March 0700PST.

Heavy Rain in PLACER, CALIFORNIA
From 20-MAR-18 06:00:00 to 23-MAR-18 06:00:00 (PST-8)
Location: TAHOE PINES
Reported by: Mesonet

Mesonet station WRDC1, 2 miles south of Alpine Meadows reported 7.30 inches of storm total rainfall from 20 March 0600PST to 23 March 0600PST.

Heavy Rain in EL DORADO, CALIFORNIA
From 20-MAR-18 03:53:00 to 23-MAR-18 03:53:00 (PST-8)
Location: (TVL)TAHOE VLY
Reported by: ASOS

ASOS TVL, South Lake Tahoe Airport reported 3.69 inches of storm total rainfall from 20 March 0353PST to 23 March 0353PST.

Heavy Rain in ALPINE, CALIFORNIA
From 20-MAR-18 06:48:00 to 23-MAR-18 06:48:00 (PST-8)
Location: MARKLEEVILLE
Reported by: Mesonet

Mesonet station MKEC1, Markleeville reported 3.64 inches of storm total rainfall from 20 March 0648PST to 23 March 0648PST.

Heavy Rain in LASSEN, CALIFORNIA
From 20-MAR-18 06:56:00 to 23-MAR-18 06:56:00 (PST-8)
Location: WESTWOOD
Reported by: Mesonet

Mesonet station WWDC1, 4 miles south-southwest of Fredonyer Pass reported 2.06 inches of storm total rainfall from 20 March 0656PST to 23 March 0656PST.

Heavy Rain in MONO, CALIFORNIA
From 20-MAR-18 06:49:00 to 23-MAR-18 06:49:00 (PST-8)
Location: BRIDGEPORT BRYANT AR
Reported by: RAWS

Mesonet station BPOC1, Bridgeport RAWS, reported 2.36 inches of storm total rainfall from 20 March 0649PST to 23 March 0649PST.

Heavy Rain in MONO, CALIFORNIA
From 20-MAR-18 06:00:00 to 23-MAR-18 06:00:00 (PST-8)
Location: SILVER LAKE
Reported by: Mesonet

Mesonet station JEMC1, 5 miles west of June Lake reported 3.36 inches of storm total rainfall from 20 March 0600PST to 23 March 0600PST.

Heavy Rain in PLUMAS, CALIFORNIA
From 20-MAR-18 06:00:00 to 23-MAR-18 06:00:00 (PST-8)
Location: CROMBERG
Reported by: Mesonet

Mesonet station GRZC1, 4 miles northeast of Cromberg reported 3.02 inches of storm total rainfall from 20 March 0600PST to 23 March 0600PST.

Heavy Rain in PLUMAS, CALIFORNIA
From 20-MAR-18 06:00:00 to 23-MAR-18 06:00:00 (PST-8)
Location: GENESEE
Reported by: Mesonet

Mesonet station ANTC1 near Antelope Lake reported 3.32 inches of storm total rainfall from 20 March 0600PST to 23 March 0600PST.