San Francisco, CA
San Francisco rain brings flash flooding to city after downpours
“When you get into that area, that’s kind of tucked in the southern portion of the low pressure, that does wind up typically being a convective environment,” Murdock said, outpointing the chilly low-pressure systems swinging down from the Gulf of Alaska and atmospheric river-driven subtropical plumes as sources of precipitation.
“It’s not abnormal for us to see this, it’s just been kind of a long time since we’ve had a consistent setup like this.”
Murdock said thunderstorms intensified over the ocean before hitting land, with warming daytime temperatures and ocean environment generating extra lift and churning that strengthened the convection.
Elsewhere in the Bay Area, Oakland got between a half and three-quarters of an inch of rain, while parts of Marin County also topped three-quarters of an inch and San Jose saw about a quarter to a third of an inch.
Scattered showers across the region Wednesday are expected to yield to partly cloudy skies with light southwest winds and highs in the upper 50s. The next chance for rain could come early next week.