A strong low pressure system dropped southeast out of the Gulf of Alaska on December 12 and intensified off the Pacific Northwest coast on December 13 pulling up some deep moisture which was pushed into central California during the afternoon.  The precipitation intensified during the evening of December 13 through the morning of December 14 as the low carved out a deep upper trough which pushed across California during the afternoon of December 14.  This system produced 2 to 4 inches of liquid precipitation over the Sierra Nevada from Sequoia National Park northward and 1 to 3 inches of liquid precipitation south of Sequoia Park.  The precipitation fell mainly in the form of snow above 5500 feet and several high elevation SNOTELs estimated 2 to 4 feet of new snowfall.  The snow level lowered to as low as 1500 feet during the evening of December 14 as the cooler airmass behind the system pushed into central California.  Much of the San Joaquin Valley picked up between 1 to 2 inches of rainfall while the Kern County Mountains picked up between 0.75 and 1.5 inches of liquid precipitation.  The Kern County Desert areas only picked up between a quarter and a half inch of rain at most locations due to rain shadowing.  The storm produced widespread minor nuisance flooding in the San Joaquin Valley and Sierra foothills with a few rock slides noticed.  Several roads were closed as a precaution and chain restrictions were implemented on some roads in the Sierra Nevada.  The storm also produced strong winds over the West Side Hills as well as in the Grapevine and Tehachapi areas in Kern County.  Several stations in these areas measured wind gusts exceeding 50 mph with a few locations near the Grapevine measuring brief gusts exceeding 70 mph.

Heavy Snow in KAISER TO RODGERS RIDGE, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Tamarack Summit SNOTEL (7613 ft) picked up an estimated 27 inches of new snowfall.

High Wind in GRAPEVINE, CALIFORNIA
From 14-DEC-21 03:10:00 to 14-DEC-21 03:10:00 (PST-8)
Magnitude: 70.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

The Southern California Edison station 5NW Lebec reported a peak wind gust of 81 mph.

High Wind in WEST SIDE MOUNTAINS SOUTH OF HIGHWAY 198, CALIFORNIA
From 13-DEC-21 06:30:00 to 13-DEC-21 06:30:00 (PST-8)
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

The PG&E station at Las Yuegas reported a peak wind gust of 62 mph.

Heavy Snow in UPPER SAN JOAQUIN RIVER, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Kaiser Point SNOTEL (9131 ft) picked up an estimated 27 inches of new snowfall.

Heavy Snow in KINGS CANYON NP, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Charlotte Lake SNOTEL (11961 ft) picked up an estimated 38 inches of new snowfall.

High Wind in WEST SIDE MOUNTAINS NORTH OF HIGHWAY 198, CALIFORNIA
From 13-DEC-21 06:30:00 to 13-DEC-21 06:30:00 (PST-8)
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

The PG&E station at Joaquin Ridge measured a peak wind gust of 65 mph.

Strong Wind in BAKERSFIELD, CALIFORNIA
From 13-DEC-21 21:51:00 to 13-DEC-21 21:51:00 (PST-8)
Magnitude: 35.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported a power pole down on private property.

Heavy Snow in YOSEMITE NP OUTSIDE OF THE VALLEY, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Tenaya Lake SNOTEL (8160 ft) picked up an estimated 26 inches of new snowfall.

Heavy Snow in GRANT GROVE AREA, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Big Meadows SNOTEL (7599 ft) picked up an estimated 35 inches of new snowfall.

Heavy Snow in KINGS CANYON NP, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The State Lakes SNOTEL (10419 ft) picked up an estimated 44 inches of new snowfall.

Flood in KERN, CALIFORNIA
From 14-DEC-21 10:46:00 to 14-DEC-21 11:46:00 (PST-8)
Location: KERN CITY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported roadway flooding on the southbound lanes of SR 99 near the SR 58 intersection.

Heavy Rain in MERCED, CALIFORNIA
From 13-DEC-21 04:00:00 to 14-DEC-21 15:39:00 (PST-8)
Location: GUSTINE ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter measured 2.25 inches of rainfall 2S Newman.

Heavy Snow in KAISER TO RODGERS RIDGE, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Blackcap Basin SNOTEL (10300 ft) picked up an estimated 35 inches of new snowfall.

High Wind in YOSEMITE NP OUTSIDE OF THE VALLEY, CALIFORNIA
From 13-DEC-21 09:00:00 to 13-DEC-21 09:00:00 (PST-8)
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

The Crane Flat RAWS measured a peak wind gust of 58 mph.

Flood in KERN, CALIFORNIA
From 14-DEC-21 12:29:00 to 14-DEC-21 13:29:00 (PST-8)
Location: OLD RIVER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported roadway flooding near the intersection Taft Highway and Buena Vista Rd. west of Bakersfield.

High Wind in FRAZIER MOUNTAIN COMMUNITIES, CALIFORNIA
From 13-DEC-21 21:10:00 to 13-DEC-21 21:10:00 (PST-8)
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

The PG&E station at Pelato Peak reported a peak wind gust of 70 mph.

Heavy Snow in KINGS CANYON NP, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Mitchell Meadow SNOTEL (9900 ft) picked up an estimated 46 inches of new snowfall.

Heavy Snow in SEQUOIA NP, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Green Mountain SNOTEL (7900 ft) picked up an estimated 31 inches of new snowfall.

Heavy Snow in UPPER SAN JOAQUIN RIVER, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Chilkoot Meadow SNOTEL (7150 ft) picked up an estimated 31 inches of new snowfall.

High Wind in GRAPEVINE, CALIFORNIA
From 14-DEC-21 06:30:00 to 14-DEC-21 06:30:00 (PST-8)
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

The Southern California Edison station at Grapevine measured a peak wind gust of 60 mph.

Strong Wind in BAKERSFIELD, CALIFORNIA
From 13-DEC-21 22:01:00 to 13-DEC-21 22:01:00 (PST-8)
Magnitude: 35.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported power lines hanging low partially blocking the road 5SW Lamont.

Heavy Snow in YOSEMITE NP OUTSIDE OF THE VALLEY, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Paradise Meadow SNOTEL (7676 ft) picked up an estimated 32 inches of new snowfall.

Heavy Snow in SEQUOIA NP, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Upper Tyndall Creek SNOTEL (11443 ft) picked up an estimated 20 inches of new snowfall.

Flood in TULARE, CALIFORNIA
From 14-DEC-21 10:59:00 to 14-DEC-21 11:59:00 (PST-8)
Location: WOODLAKE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported roadway flooding near the intersection of north Valencia Blvd. and West Cajon Ave. in Woodlake.

Debris Flow in FRESNO, CALIFORNIA
From 14-DEC-21 08:48:00 to 14-DEC-21 11:48:00 (PST-8)
Location: ROCK HAVEN
Flood cause: Heavy Rain / Burn Area
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported a rockslide blocking the westbound lanes of SR 168 near Cressman Rd.

High Wind in TEHACHAPI, CALIFORNIA
From 14-DEC-21 03:20:00 to 14-DEC-21 03:20:00 (PST-8)
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

The PG&E station at Beartrap Road reported a peak wind gust of 70 mph.

Heavy Snow in SOUTH END OF THE UPPER SIERRA, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Wet Meadows SNOTEL (9019 ft) picked up an estimated 29 inches of new snowfall.

Heavy Snow in YOSEMITE NP OUTSIDE OF THE VALLEY, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Tuolumne Meadows SNOTEL (8600 ft) picked up an estimated 35 inches of new snowfall.

Heavy Snow in KAISER TO RODGERS RIDGE, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The West Woodchuck Meadow SNOTEL (9209 ft) picked up an estimated 33 inches of new snowfall.

High Wind in GRAPEVINE, CALIFORNIA
From 14-DEC-21 00:00:00 to 14-DEC-21 00:00:00 (PST-8)
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

The Southern California Edison station at the Lebec Service Station measured a peak wind gust of 59 mph.

Heavy Snow in SOUTH END OF THE UPPER SIERRA, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 18:45:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter measured 24.0 inches of new snow in Ponderosa.

Heavy Snow in KINGS CANYON NP, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Bishop Pass SNOTEL (11972 ft) picked up an estimated 19 inches of new snowfall.

Heavy Snow in YOSEMITE NP OUTSIDE OF THE VALLEY, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Lower Kibbie Ridge SNOTEL (6479 ft) picked up an estimated 24 inches of new snowfall.

Heavy Snow in SOUTH END OF THE UPPER SIERRA, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Tunnel Guard Station SNOTEL (9000 ft) picked up an estimated 25 inches of new snowfall.

Flood in KERN, CALIFORNIA
From 14-DEC-21 12:33:00 to 14-DEC-21 13:33:00 (PST-8)
Location: BEALVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported roadway flooding along SR 58 7WNW of Keene.

Winter Weather in TEHACHAPI, CALIFORNIA
From 14-DEC-21 05:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Kern County Emergency Manager reported that several mountain community roads were closed due to snow and ice.

Debris Flow in FRESNO, CALIFORNIA
From 14-DEC-21 07:28:00 to 14-DEC-21 10:28:00 (PST-8)
Location: NAVELENCIA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported a rockslide along SR 180 west of Squaw Valley.

Winter Weather in FRAZIER MOUNTAIN COMMUNITIES, CALIFORNIA
From 14-DEC-21 05:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Kern County Emergency Manager reported that several mountain community roads were closed due to snow and ice.

High Wind in MOJAVE DESERT SLOPE(S), CALIFORNIA
From 14-DEC-21 03:26:00 to 14-DEC-21 03:26:00 (PST-8)
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

The Indian Wells Canyon RAWS measured a peak wind gust of 69 mph.

High Wind in GRAPEVINE, CALIFORNIA
From 14-DEC-21 04:13:00 to 14-DEC-21 04:13:00 (PST-8)
Magnitude: 71.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

The Grapevine Peak RAWS measured a peak wind gust of 82 mph.

High Wind in WEST SIDE MOUNTAINS NORTH OF HIGHWAY 198, CALIFORNIA
From 13-DEC-21 17:20:00 to 13-DEC-21 17:20:00 (PST-8)
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

The PG&E station at Alcade reported a peak wind gust of 62 mph.

Heavy Snow in SEQUOIA NP, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Giant Forest SNOTEL (6650 ft) picked up an estimated 19 inches of new snowfall.

Heavy Snow in YOSEMITE NP OUTSIDE OF THE VALLEY, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Gin Flat SNOTEL (7201 ft) picked up an estimated 27 inches of new snowfall.

Heavy Snow in KAISER TO RODGERS RIDGE, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Huntington Lake SNOTEL (7020 ft) picked up an estimated 28 inches of new snowfall.

High Wind in GRAPEVINE, CALIFORNIA
From 13-DEC-21 23:20:00 to 13-DEC-21 23:20:00 (PST-8)
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

The PG&E station 2W Lebec measured a peak wind gust of 58 mph.

Strong Wind in MARIPOSA - MADERA LOWER SIERRA, CALIFORNIA
From 13-DEC-21 21:39:00 to 13-DEC-21 21:39:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 12.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported a power pole and a transformer down on the road 6SW Coarsegold.

Heavy Snow in YOSEMITE NP OUTSIDE OF THE VALLEY, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Ostrander Lake SNOTEL (8264 ft) picked up an estimated 32 inches of new snowfall.

Heavy Snow in UPPER SAN JOAQUIN RIVER, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Devils Postpile SNOTEL (8004 ft) picked up an estimated 34 inches of new snowfall.

Heavy Snow in SEQUOIA NP, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Chagoopa Plateau SNOTEL (9450 ft) picked up an estimated 39 inches of new snowfall.

High Wind in MOJAVE DESERT SLOPE(S), CALIFORNIA
From 14-DEC-21 01:40:00 to 14-DEC-21 01:40:00 (PST-8)
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

The Southern California Edison station at Quarry Access measured a peak wind gust of 62 mph.

Heavy Snow in SOUTH END OF THE UPPER SIERRA, CALIFORNIA
From 13-DEC-21 10:00:00 to 14-DEC-21 22:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Pascoes SNOTEL (9153 ft) picked up an estimated 19 inches of new snowfall.

Debris Flow in TULARE, CALIFORNIA
From 14-DEC-21 13:14:00 to 14-DEC-21 16:14:00 (PST-8)
Location: PORTERVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported mud, rock and dirt covering most of North Plano St. near Lynch Dr.

Flood in FRESNO, CALIFORNIA
From 14-DEC-21 08:23:00 to 14-DEC-21 09:23:00 (PST-8)
Location: CLARKS CORNER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway patrol reported roadway flooding at the intersection of East Dinuba Ave. and South Alta Ave. east of Reedley.