Monday’s weather provided a little bit of everything: Sun, scattered rain, gusty winds — even threat of a thunderstorm or two — and today’s forecast appears to be serving up more of the same before rain and winds taper off.
With a few exceptions, such as the Santa Cruz Mountains, rainfall Sunday night and early Monday wasn’t as heavy as anticipated, the National Weather Service reported. There were some downpours and felled trees that closed roadways and caused minor flooding overnight, but no major power outages, officials said.
“We still had some decent rainfall overnight across the area, but the amounts were not as high as they could have been,” said Roger Gass, a NWS meteorologist.
After getting off to a slow start, most cities in the Bay Area recorded modest rainfall in the 24 hours ending Monday afternoon, according to the NWS California Nevada River Forecast Center, with .25 inches in San Francisco, .46 inches in downtown Oakland, .33 inches in Redwood City, .53 inches in Concord, and .31 inches in San Jose. There were exceptions. Dublin recorded 1.72 inches and Mt. Diablo recorded 1.71 inches. And in the Santa Cruz Mountains, Ben Lomond recorded 2.38 inches of rain.
Trees fell in different parts of Oakland and minor flooding was reported in Dublin, Hayward and in Contra Costa County.
The California Highway Patrol reported Monday that a portion of Niles Canyon Road, also known as State Route 84, west of Sunol partially collapsed, and that Caltrans was on scene providing one-way traffic control. A full road closure was expected to start at 5 p.m. Monday. The CHP said Caltrans will return this morning to reassess with long-term repair plans to be determined.
But the weather late Monday and into today could have a greater impact, the NWS said.
Periods of moderate to heavy rains with gusty winds are forecast, with the chances of thunderstorms increasing. Showers are expected to linger into mid-week before dry conditions return, and rain is expected to return on the weekend, the NWS said.
Gass said “some areas may be really wet and others are not going to be. It’s a hit-and-miss situation.”
There is a flood watch through Wednesday morning and high surf and wind advisories until 4 a.m. today, the NWS said.
The high wind advisory brings the possibility of downed trees and power lines. Most of the Bay Area is expected to experience sustained winds of 35-39 mph with some higher gusts. The mountains above 900 feet could experience gusts between 45 and 69 mph.
A winter storm warning remained in effect in the Greater Lake Tahoe Region. Snow showers, some heavy, and thunderstorms remained a possibility Monday night and into early Tuesday. Snow accumulation could be 3 to 9 inches with 6 to 12 inches above 7,000 feet. The Central Sierra Snow Lab at Donner Pass recorded 10.2 inches of snow in the 24-hour period ending Monday morning.