A stronger two-part storm aided by an enhanced influx of subtropical moisture from a moderate atmospheric river continued the current series of Pacific winter storms passing through the region January 14-16. The initial thrust of AR enhanced moisture with the first storm brought heavy snowfall to the Sierra on 14 January with 2 to 3 feet of accumulating snow across higher elevations above 7000 feet.  An additional 15-30 inches of new snow fell across the California side of the Lake Tahoe Basin below 7000 feet with 8-16 inches falling on the Nevada side. Periods of heavy snow forced the closure of Sierra passes with the primary Sierra travel routes (I-80, US-50) being closed for much of the day. Precipitation started as rain for western Nevada on the 14th with rain totals of around a quarter inch and up to three-quarter inches for Reno-Carson City areas that continued south into the Carson Valley of Douglas County. Rainfall amounts with this storm surpassed the average water year precipitation of 7.35 inches on January 14th for the Reno area.  The second, colder wave of the same winter storm arrived overnight January 15-16.  This colder system produced 4-8 inches of total storm snowfall across the Reno-Carson metro areas including parts of Lyon-Mineral counties.  This system also dumped around a foot of snow across Douglas County. This second storm caused more significant travel impacts for western Nevada valleys/foothills.  Mono County and the Tahoe Basin also received an additional foot of accumulating snow accumulation with this colder follow-up to the winter storm system.

Heavy Snow in MONO, CALIFORNIA
From 15-JAN-23 07:00:00 to 15-JAN-23 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A COCORAHS station (CA-MN-6) located 1.9 mi SW of Mono City, CA, reported a 24 hour snowfall amount  of 8.8 inches.

Heavy Snow in MONO, CALIFORNIA
From 14-JAN-23 07:00:00 to 15-JAN-23 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

COCORAHS station (CA-MN-6) located  1.9 mi SW of Mono City, as well as the summits of the June Mountain Ski Base, CA, and Mammoth Mountain Ski Base, CA, reported 24 hour  snowfall amounts of 13.1, 23, and 36 inches respectively.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 14-JAN-23 07:00:00 to 15-JAN-23 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A COCORAHS station (CA-ED-20) located 2.0 mi NW Meyers , CA and a CO-OP observer (TAAC1) located  in Tahoma, CA reported 24 hour snow amounts of 13.0 and 18.5 inches respectively.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 15-JAN-23 08:00:00 to 16-JAN-23 08:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public at the Palisades Tahoe Ski Base, CA, and Homewood Mountain Ski Base, CA,  reported 24 hour upper summit snow amounts of 9.0 and 14.0 inches respectively.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 14-JAN-23 10:00:00 to 15-JAN-23 10:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter located at the Homewood Mountain Ski Base, CA, reported 24 hour snow amount of 17 inches.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 15-JAN-23 08:00:00 to 16-JAN-23 08:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

CO-OP observers located in Tahoe City, CA,( TAHC1 ) and  6.0 mi W of Truckee, CA, (Central Sierra Snow Lab) reported 24 hour snow amounts of 6.0 and 6.9 inches respectively.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 14-JAN-23 08:00:00 to 15-JAN-23 08:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public located 1.0 mi SSW of the Northstar Ski Base, CA, as well as the Palisades Tahoe Ski Base, CA, Heavenly Ski base, CA, and Homewood Mountain Ski Base, CA,  reported 24 hour upper summit snow amounts of 17.0, 21.0, 23.0, and 25.0 inches respectively.

Heavy Snow in MONO, CALIFORNIA
From 15-JAN-23 07:00:00 to 16-JAN-23 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A CO-OP observer (TPZN2) located 8.4 mi NW of the Bridgeport Reservoir, CA and the public located at Mammoth Mountain Ski Base, CA, both reported 24 hour snow amounts of 10 inches.

Heavy Snow in GREATER LAKE TAHOE AREA, CALIFORNIA
From 16-JAN-23 07:00:00 to 17-JAN-23 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public at the Tahoe-Donner Ski Resort located 4.0 mi NW of Truckee, CA, reported 24 hour snowfall amounts of 10.0 inches.