A series of Pacific storms moved across interior Northern California bringing heavy snow, strong winds, and dangerous travel conditions to the mountains.  Storm totals in the northern Sierra Nevada mountains measured up to 5 feet above 7000 feet, with amounts of 2 to 3 feet near 5000 feet.
Strong winds, heavy rain, and thunderstorms impacted the Central Valley on the 19th and 20th. An all-time record low barometric pressure was set for Sacramento on the 21st. The lowest sea level pressure at Sacramento Executive Airport was 28.94 inches at 2:46 pm PST. This broke the previous record of 28.95 inches, set on January 27th at the old U.S. Weather Bureau Office in downtown Sacramento.

Winter Storm in WEST SLOPE NORTHERN SIERRA NEVADA, CALIFORNIA
From 19-JAN-10 12:00:00 to 21-JAN-10 20:00:00 (PST-8)
Crop damage: 0.00K
Reported by: Public

Snow amounts of 1 to 3 feet were reported above 5000 feet at northern Sierra Nevada mountain ski resorts and SNOTEL sites.  Fourteen inches was measured at Blue Canyon and 33 inches was measured at Soda Springs.  A wind gust to 45 mph was reported at Blue Canyon. The heavy snow and gusty wind resulted in hazardous travel over mountain roads and passes.

High Wind in SOUTHERN SACRAMENTO VALLEY, CALIFORNIA
From 20-JAN-10 09:29:00 to 20-JAN-10 09:29:00 (PST-8)
Magnitude: 52.00 MG
Reported by: ASOS

Wind gusts up to 60 mph were measured at Sacramento International Airport.  Power was knocked out to 27000 customers in the Sacramento metropolitan area.

High Wind in CENTRAL SACRAMENTO VALLEY, CALIFORNIA
From 20-JAN-10 10:35:00 to 20-JAN-10 10:35:00 (PST-8)
Magnitude: 52.00 MG
Reported by: ASOS

Wind gusts to 60 mph were measured at Oroville Airport.

High Wind in NORTHERN SAN JOAQUIN VALLEY, CALIFORNIA
From 20-JAN-10 08:00:00 to 20-JAN-10 12:00:00 (PST-8)
Magnitude: 44.00 MS
Reported by: ASOS

Wind gusts to 57 mph and sustained winds to 44 mph were measured at Stockton Airport.  The wind knocked out power to 14000 customers in the area.

Winter Storm in WEST SLOPE NORTHERN SIERRA NEVADA, CALIFORNIA
From 17-JAN-10 20:00:00 to 19-JAN-10 12:00:00 (PST-8)
Crop damage: 0.00K
Reported by: Public

Snow amounts up to 2 feet were reported at area ski resorts.  The heavy snow and gusty winds resulted in hazardous travel.

Winter Storm in MT SHASTA/WESTERN PLUMAS COUNTY, CALIFORNIA
From 17-JAN-10 17:00:00 to 19-JAN-10 04:00:00 (PST-8)
Crop damage: 0.00K
Reported by: SNOTEL

Snow amounts up to a foot were reported above 5000 feet, with 10 inches of new snow measured at Mineral.  The heavy snow and gusty winds resulted in hazardous travel.

Hail in SOLANO, CALIFORNIA
From 19-JAN-10 15:45:00 to 19-JAN-10 15:55:00 (PST-8)
Location: VACAVILLE NUT TREE
Magnitude: 0.75 
Property damage: 100.00K
Reported by: Newspaper

Penny sized hail covered the ground to 2 inches deep, resulting in numerous car accidents.

Winter Storm in MT SHASTA/WESTERN PLUMAS COUNTY, CALIFORNIA
From 21-JAN-10 10:00:00 to 22-JAN-10 12:00:00 (PST-8)
Crop damage: 0.00K
Reported by: Park/Forest Service

Snow amounts of 7 to 10 inches were reported.  The heavy snow and gusty winds resulted in hazardous travel.

Winter Storm in WEST SLOPE NORTHERN SIERRA NEVADA, CALIFORNIA
From 21-JAN-10 12:00:00 to 22-JAN-10 12:00:00 (PST-8)
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall amounts up to a foot were reported above 5000 feet in the northern Sierra Nevada mountains from spotters and at area ski resorts.  A spotter at Kirkwood measured 12 inches of new snow and 15 inches was measured at Soda Springs.  The heavy snow and gusty winds resulted in hazardous travel over mountain roads and passes.

Winter Storm in MOUNTAINS SOUTHWEST SHASTA COUNTY TO NORTHERN LAKE COUNTY, CALIFORNIA
From 18-JAN-10 18:00:00 to 20-JAN-10 16:00:00 (PST-8)
Reported by: Trained Spotter

Snow amounts up to 10 inches were reported.  The heavy snow and gusty winds resulted in hazardous travel.

Winter Storm in SHASTA LAKE/NORTH SHASTA COUNTY, CALIFORNIA
From 19-JAN-10 06:00:00 to 19-JAN-10 23:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Five to eight inches of snow fell at the higher elevations including six inches at Shasta City and two inches in the foothills north of Redding.

Winter Storm in BURNEY BASIN/EASTERN SHASTA COUNTY, CALIFORNIA
From 20-JAN-10 06:00:00 to 21-JAN-10 04:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Up to another foot of snow fell across the area less than a day following the previous storm.  Winds were not as strong but roadways warmed slightly between the storms and became icy before the latest layer of snow.  This resulted in even more treacherous driving conditions.

Winter Storm in BURNEY BASIN/EASTERN SHASTA COUNTY, CALIFORNIA
From 19-JAN-10 08:00:00 to 19-JAN-10 23:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Five to ten inches of snow fell at the highest elevations including five inches in Burney.  Strong winds to 40 mph resulted in periods of blowing snow and poor visibility on area roads.

Winter Storm in SHASTA LAKE/NORTH SHASTA COUNTY, CALIFORNIA
From 20-JAN-10 06:00:00 to 21-JAN-10 04:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Six to ten inches of new snow fell across the highest elevations less than a day following the previous storm.  Winds were not as strong but roadways warmed slightly between the storms and became icy before the latest layer of snow... resulting in treacherous driving conditions.