Weather Service Reports Napa County Snowfall Amounts

NAPA COUNTY, CA — Snow fell as predicted overnight in Napa County, blanketing the mountains in white, blocking roadways and closing schools.

Calistoga had 9 inches of snow by Friday, Angwin got 8 inches and St. Helena got 7.5 inches, the National Weather Service said.

The snow prompted the Napa County Office of Emergency Services to advise residents and workers west of state Highway 29 and east of Silverado Trail to stay in place Friday.

County officials announced the following school closures Friday: Calistoga Joint Unified School District, Pope Valley Union Elementary School District, Howell Mountain Elementary School District and Sattui Preschool.

The snowstorm affected the majority of Napa Valley‘s mountainous roadways, according to the California Highway Patrol. The agency said to avoid mountain travel if at all possible.

As of 6 p.m. Friday, all lanes of northbound and southbound CA-29 were blocked between Tubbs Lane and Bradford Road. The closure was likely to remain in effect throughout the weekend, the CHP said.

Other road closures still in effect late Friday in Napa County included Deer Park at Crestmont Drive and College Avenue at Howell Mountain Road in Angwin. Atlas Peak was closed at Westgate, where a snow-covered tree was reportedly blocking the roadway.

Power Restored In Calistoga

Most of Calistoga was without power Friday morning due to the winter storm that came through the region overnight, city officials said.

The city issued an alert shortly before 7:15 a.m. about the widespread loss of power, saying PG&E was sending crews to assess the cause of the outage.

Power was restored to the city by 12:23 p.m. Friday.

First Sizable Bay Area Snow In Over A Decade

Elsewhere in the Bay Area, more than a foot of snow fell in some parts, making it the first sizable amount of snow in the region in more than a decade, according to the National Weather Service.

About 14 inches of snow were reported on Mount Hamilton east of San Jose as of 2 p.m. Friday, the highest amount in the region, while 11 inches were reported in the Los Gatos area. In the North Bay, 6 inches fell in Cloverdale. In San Mateo County, about 6 inches fell in the Portola Valley area and 3 inches fell in the Orinda area of the East Bay.

Weather service meteorologist Brooke Bingaman said the last notable day of snowfall in the Bay Area came in February 2011. That day saw more snow at lower elevations, while Friday's snow accumulated more at higher elevations, she said.

People on social media Friday posted many photos and videos of the Bay Area becoming a winter wonderland, but the region's roads were more of a horror show, with several highways having to shut down due to icy conditions and downed trees or power lines.

Got photos of the snow in Napa County? Send to maggie.fusek@patch.com for publication.

Bay City News Service contributed to this report.