An atmospheric river associated with a midlatitude cyclone brought greater than 2 inches of rainfall to the Sierra Nevada and 1 to 2 feet of snowfall above 7000 feet in the Lake Tahoe Basin and in Mono County. Rainfall totals in northeast California and the lower valleys of northern Mono County ranged from around 0.50 inches up to nearly 1.50 inches. Freezing levels derived from WFO Reno soundings rose slowly throughout the event.

Heavy Rain in NEVADA, CALIFORNIA
From 01-DEC-19 00:00:00 to 02-DEC-19 23:59:00 (PST-8)
Location: HOBART MILLS
Reported by: SNOTEL

SNOTEL near Independence Lake reported 4.50 inches of rainfall in a 48-hour period from 1 December 0000PST to 2 December 2359PST. Station elevation of 8337 ft MSL.

Heavy Rain in LASSEN, CALIFORNIA
From 01-DEC-19 00:00:00 to 02-DEC-19 23:59:00 (PST-8)
Location: RED ROCK
Reported by: RAWS

Denten Creek RAWS MWKC1 near Blairsden reported 2.84 inches of rainfall in a 48-hour period from 1 December 0000PST to 2 December 2359PST. Station elevation of 5149 ft MSL.

Heavy Snow in MONO, CALIFORNIA
From 01-DEC-19 07:00:00 to 02-DEC-19 07:00:00 (PST-8)
Reported by: Public

June Mountain Ski Area reported 12 inches of snowfall in a 1-day period from the morning of the 1st through the 2nd at an elevation of 7545 feet MSL.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 01-DEC-19 00:00:00 to 02-DEC-19 07:00:00 (PST-8)
Reported by: Public

Heavenly Ski Resort reported 18 inches of snowfall in a 2-day period from the 30th of November through the morning of December 2nd at an elevation of 6540 feet MSL.

Heavy Snow in MONO, CALIFORNIA
From 01-DEC-19 00:00:00 to 02-DEC-19 07:00:00 (PST-8)
Reported by: Public

Mammoth Mountain Ski Area reported 31 inches of snowfall in a 2-day period from the 30th of November through the morning of December 2nd at their mid-mountain location of 9014 feet MSL.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 01-DEC-19 00:00:00 to 02-DEC-19 07:00:00 (PST-8)
Reported by: Public

Squaw Valley Ski Resort reported 37 inches of snowfall in a 2-day period from the 30th of November through the morning of December 2nd at their mid-mountain location of 8200 feet MSL.

Heavy Rain in MONO, CALIFORNIA
From 01-DEC-19 00:00:00 to 02-DEC-19 23:59:00 (PST-8)
Location: MONO LAKE
Reported by: Mesonet

HADS station ERYC1 at Ellery Lake reported 1.70 inches of rainfall in a 48-hour period from 1 December 0000PST to 2 December 2359PST. Station elevation of 9504 ft MSL.

Heavy Rain in ALPINE, CALIFORNIA
From 01-DEC-19 00:00:00 to 02-DEC-19 23:59:00 (PST-8)
Location: MARKLEEVILLE
Reported by: SNOTEL

SNOTEL EBTC1 at Ebbetts Pass reported 6.60 inches of rainfall in a 48-hour period from 1 December 0000PST to 2 December 2359PST. Station elevation of 8660 ft MSL.

Heavy Rain in ALPINE, CALIFORNIA
From 01-DEC-19 00:00:00 to 02-DEC-19 23:59:00 (PST-8)
Location: SORENSENS
Reported by: SNOTEL

SNOTEL BSKC1 at Burnside Lake reported 4.40 inches of rainfall in a 48-hour period from 1 December 0000PST to 2 December 2359PST. Station elevation of 8158 ft MSL.

Heavy Rain in ALPINE, CALIFORNIA
From 01-DEC-19 00:00:00 to 02-DEC-19 23:59:00 (PST-8)
Location: MARKLEEVILLE
Reported by: RAWS

RAWS MKEC1 near Markleeville reported 1.98 inches of rainfall in a 48-hour period from 1 December 0000PST to 2 December 2359PST. Station elevation of 5501 ft MSL.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 01-DEC-19 00:00:00 to 02-DEC-19 07:00:00 (PST-8)
Reported by: Public

Alpine Meadows Ski Resort reported 31 inches of snowfall in a 2-day period from the 30th of November through the morning of December 2nd at their upper-mountain location of 8000 feet MSL.

Debris Flow in EL DORADO, CALIFORNIA
From 02-DEC-19 13:15:00 to 02-DEC-19 13:20:00 (PST-8)
Location: ECHO LAKE
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A rockslide occurred within the westbound lane of US Highway 50 approximately 2 miles east of Echo Summit on 2 December 1315PST. The highway was closed for approximately one hour to clean up. One lane controls lasted for approximately 5 to 6 hours.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 01-DEC-19 00:00:00 to 02-DEC-19 07:00:00 (PST-8)
Reported by: Public

Northstar Ski Resort reported 37 inches of snowfall in a 2-day period from the 30th of November through the morning of December 2nd at their mid-mountain location of 6900 feet MSL.

Heavy Rain in EL DORADO, CALIFORNIA
From 01-DEC-19 00:00:00 to 03-DEC-19 23:59:00 (PST-8)
Location: VADE
Reported by: SNOTEL

SNOTEL ECOC1 at Echo Peak reported 4.90 inches of rainfall in a 48-hour period from 1 December 0000PST to 2 December 2359PST. Station elevation of 7652 ft MSL.

Heavy Rain in EL DORADO, CALIFORNIA
From 01-DEC-19 00:00:00 to 02-DEC-19 23:59:00 (PST-8)
Location: CAMP RICHARDSON
Reported by: SNOTEL

SNOTEL FLFC1 at Fallen Leaf Lake reported 3.30 inches of rainfall in a 48-hour period from 1 December 0000PST to 2 December 2359PST. Station elevation of 6241 ft MSL.

Heavy Rain in ALPINE, CALIFORNIA
From 01-DEC-19 00:00:00 to 02-DEC-19 23:59:00 (PST-8)
Location: SORENSENS
Reported by: ASOS

ASOS KTVL at South Lake Tahoe Airport reported 1.88 inches of rainfall in a 48-hour period from 1 December 0000PST to 2 December 2359PST. Station elevation of 6257 ft MSL.

Heavy Rain in PLACER, CALIFORNIA
From 01-DEC-19 07:00:00 to 03-DEC-19 07:00:00 (PST-8)
Location: TAHOE CITY
Reported by: COOP Observer

CO-OP observer at Tahoe City reported 3.07 inches of rainfall in a 48-hour period from 1 December 0700PST to 3 December 0700PST. Station elevation of 6230 ft MSL.

Heavy Rain in MONO, CALIFORNIA
From 01-DEC-19 00:00:00 to 02-DEC-19 23:59:00 (PST-8)
Location: WALKER
Reported by: SNOTEL

SNOTEL station LELC1 at Leavitt Lake reported 4.50 inches of rainfall in a 48-hour period from 1 December 0000PST to 2 December 2359PST. Station elevation of 9602 ft MSL.

Heavy Rain in PLACER, CALIFORNIA
From 01-DEC-19 00:00:00 to 02-DEC-19 23:59:00 (PST-8)
Location: SUNNYSIDE
Reported by: SNOTEL

SNOTEL near the headwaters of Ward Creek reported 4.90 inches of rainfall in a 48-hour period from 1 December 0000PST to 2 December 2359PST. Station elevation of 6764 ft MSL.

Heavy Rain in SIERRA, CALIFORNIA
From 01-DEC-19 07:00:00 to 02-DEC-19 07:00:00 (PST-8)
Location: SIERRAVILLE DRWTR AR
Reported by: COOP Observer

CO-OP observer at Sierraville reported 2.13 inches of rainfall in a 48-hour period from 1 December 0700PST to 2 December 0700PST. Station elevation of 4975 ft MSL.