Tule fog returned to the central and southern San Joaquin Valley on December 14th, and increased in coverage each day through the 17th. The fog lifted into a stratus deck during the afternoon of the 17th and persisted through the afternoon of the 19th, as a ridge of high pressure became established over the area. The stratus started eroding from the southern San Joaquin during the late morning of the 19th, then kept clearing toward the central part of the valley by the afternoon. Some patchy fog was observed on the night on the 19th-20th, and again on the night of the 20th-21st. Rain returned to the valley with snow in the higher elevations of the Sierra Nevada (started at around 9000 feet) on the 21st as another trough of low pressure that over the area. By the morning of the 22nd, the cold air behind the low pressure center moved over the area, causing gusty winds even over the San Joaquin Valley, and snow levels lowered dramatically (below 2500 feet by the late morning). Interstate 5 over the Grapevine was closed during the morning of the 22nd due to snow. Winds gusted to 40 mph at Fresno Yosemite International Airport on the 22nd and to 46 mph at the Madera Municipal Airport. Winds gusted as high as 78 mph in the Kern County deserts, and a few dead trees were toppled near Tehachapi by gusts in the 40-45 mph range.
The cold air remained trapped in the San Joaquin Valley after the storm moved east of the region. Freezing temperatures were reported on the morning of December 24th, with lows in the rural areas dropping into the mid 20s. Clouds ahead of the next storm moved into the region Christmas Day, limiting the extent of the freezing temperatures and heralding the arrival of more precipitation to the region.

Frost/Freeze in SE S.J. VALLEY, CALIFORNIA
From 24-DEC-09 01:00:00 to 24-DEC-09 08:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Frost/Freeze in SW S.J. VALLEY, CALIFORNIA
From 24-DEC-09 01:00:00 to 24-DEC-09 08:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Frost/Freeze in E CENTRAL S.J. VALLEY, CALIFORNIA
From 24-DEC-09 01:00:00 to 24-DEC-09 08:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Frost/Freeze in W CENTRAL S.J. VALLEY, CALIFORNIA
From 24-DEC-09 01:00:00 to 24-DEC-09 08:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in SW S.J. VALLEY, CALIFORNIA
From 22-DEC-09 12:00:00 to 22-DEC-09 18:00:00 (PST-8)
Magnitude: 39.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Heavy Rain in FRESNO, CALIFORNIA
From 21-DEC-09 23:38:00 to 21-DEC-09 23:38:00 (PST-8)
Location: DUNLAP
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Seven-tenths of an inch of rainfall occurred in just one hour near Dunlap in Fresno County.

Strong Wind in W CENTRAL S.J. VALLEY, CALIFORNIA
From 22-DEC-09 12:00:00 to 22-DEC-09 18:00:00 (PST-8)
Magnitude: 39.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in E CENTRAL S.J. VALLEY, CALIFORNIA
From 22-DEC-09 12:00:00 to 22-DEC-09 18:00:00 (PST-8)
Magnitude: 39.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

High Wind in SE KERN CTY DESERT, CALIFORNIA
From 22-DEC-09 08:30:00 to 22-DEC-09 19:45:00 (PST-8)
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet