A deep upper trough with a warm subtropical moisture fetch in front of it pushed into central California during the evening of December 22 and brought a period of rain and higher elevation snow to the area which continued through the evening of December 23. Several stations in the Sierra Nevada measured between 1 and 3 inches of liquid precipitation with the snow level between 8000 and 9000 feet.  Rain shadowing kept precipitation amounts in the San Joaquin Valley lower with a half inch to an inch of rain on the east side and a quarter to half inch of the west side.  Some localized nuisance flooding was reported during the afternoon of December 23.  Cooler air pushed into the area during the evening of December 23 resulting in showery precipitation which continued through the early morning of December 24.  A few higher elevation SNOTELs picked up an estimated 18 to 24 inches of new snowfall.  Some ice pellet showers and a few thunderstorms were observed in the Sierra foothills and the snow level in the Sierra Nevada lowered to around 5500 feet before the precipitation tapered off.

Heavy Snow in SEQUOIA NP, CALIFORNIA
From 23-DEC-21 04:00:00 to 24-DEC-21 04:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Upper Tyndall Creek SNOTEL (11443 ft) picked up an estimated 22 inches of new snowfall.

Heavy Snow in KINGS CANYON NP, CALIFORNIA
From 23-DEC-21 04:00:00 to 24-DEC-21 04:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Bishop Pass SNOTEL (11972 ft) picked up an estimated 23 inches of new snowfall.

Flood in FRESNO, CALIFORNIA
From 23-DEC-21 15:12:00 to 23-DEC-21 16:12:00 (PST-8)
Location: GLORIETTA
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 E. Copper Ave. and Auberry Rd.

Flood in FRESNO, CALIFORNIA
From 23-DEC-21 15:48:00 to 23-DEC-21 16:48:00 (PST-8)
Location: BIOLA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported roadway flooding at the itnersection of N. Madera Ave. and W. Shaw Ave.

Flood in FRESNO, CALIFORNIA
From 23-DEC-21 16:17:00 to 23-DEC-21 18:17:00 (PST-8)
Location: SHAVER LAKE HGTS
Flood cause: Heavy Rain / Burn Area
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported roadway flooding at the intersection of SR 168 and Sparrow Rd.

Flood in TULARE, CALIFORNIA
From 23-DEC-21 16:35:00 to 23-DEC-21 17:35:00 (PST-8)
Location: STRATHMORE AIRPORT
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 SR 65 and Harvard Ave.

Debris Flow in TULARE, CALIFORNIA
From 23-DEC-21 16:45:00 to 23-DEC-21 18:45:00 (PST-8)
Location: KAWEAH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported a large boulder on the road at the intersection of Crest Ln. and Sierra King Dr.

Heavy Snow in YOSEMITE NP OUTSIDE OF THE VALLEY, CALIFORNIA
From 23-DEC-21 04:00:00 to 24-DEC-21 04:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Tuolumne Meadows SNOTEL (8600 ft) picked up an estimated 18 inches of new snowfall.