"The pattern change began Monday when the barometric pressure surrounding the region started to fall gradually. That increase in low pressure is coming from the southwest and the air is flowing north, opposite of many winter low-pressure systems that dip in from the Pacific Northwest. As a result, light but steady rain is expected to start in Monterey County and the Central Coast late Tuesday morning. The rain is expected to reach the region closer to San Francisco sometime Tuesday night, Murdock said."
"According to Murdock, the central coast and areas in the Santa Cruz Mountains and Big Sur may receive as much as 2 1/2 inches during this initial rain. The way the air is churning around the low pressure also is expected to create some heavy winds in that area, according to the weather service. A wind advisory begins for Monterey and San Benito counties at 4 p.m. Tuesday and will be in effect through 4 p.m. Wednesday."
A pattern change brought falling barometric pressure and a southwest low that is driving air north, reversing typical Pacific Northwest low-pressure flows. Light but steady rain will start late Tuesday morning in Monterey County and the Central Coast and reach nearer San Francisco Tuesday night. The central coast, Santa Cruz Mountains and Big Sur could receive up to 2 1/2 inches, with churning air producing heavy winds and a wind advisory from 4 p.m. Tuesday through 4 p.m. Wednesday for Monterey and San Benito counties. The rest of the region should get 0.5-0.75 inches. A more intense low-pressure system with a cold front is expected by the weekend, but timing and amounts remain uncertain.
Read at The Mercury News
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