Snapshot of ECMWF depiction of weak surface low spinning up west of San Francisco and bringing a more intense burst of wind and rain to the SF Bay Area.

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   Daniel Swain (weatherwest@mastodon.social)'s status on Tuesday, 04-Feb-2025 17:21:37 JST Daniel Swain

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   On Tue, a modest surface low will spin up offshore west of San Francisco. This will induce "frontogenesis" (cold frontal strengthening) as the system approaches the Bay Area--likely resulting in a "sporty" cold frontal passage in portions of northern/central CA. #CAwx