The National Weather Service San Francisco branch has issued multiple advisories, including a High Surf Warning for areas along the coastline, which will be in effect from 3 PM Thursday to 3 AM PST Saturday. Individuals are advised to stay off jetties and docks, as dangerously high breaking waves, reaching between 20 to 30 feet and peaking up to 45 feet, can potentially sweep people into treacherous seas. NWS San Francisco urges extreme caution as life-threatening swimming conditions and significant beach erosion are likely to occur. Moreover, a Frost Advisory is also in place for Saturday morning, warning of cold inland temperatures that will drop into the mid-30s across specific valleys and surrounding mountains.

Following the atmospheric river's passage, NWS San Francisco's Area Forecast Discussion notes that while most weather impacts have subsided, gusty winds and scattered showers will persist through midday Friday before conditions clear. A Wind Advisory remains aplenty through 10 AM Friday, with strong winds anticipated during the night born of the pressure gradient between a parent low-pressure system and high pressure in the subtropical East Pacific. As the clouds begin to clear, winds will ease through Friday.

Regarding the terrestrial forecast, we consider a cold Saturday morning ensuing the clear skies and cold air mass settling in. Coastal areas will experience temperatures dropping into the low to mid-40s. The skies over the bay area should be dry on Saturday, but beware as the night swaddles us with increasing cloud cover ahead of a weak disturbance scheduled to arrive Sunday morning. This is expected to bring some light rain to the North Bay, although significant impacts are not anticipated from this system, with "pleasant weather for a few days with high temperatures increasing through the week," according to the National Weather Service.

Maritime conditions also warrant attention, with the NWS marine update pointing at a Small Craft Advisory that continues through Saturday for various offshore zones. Swells as high as 20 feet have been reported by coastal buoys, diminishing over the next 48 hours as the once-gale-force winds abate. Beachgoers are again warned to stay clear of the water and coastal infrastructure. "A High Surf Warning is in effect through 3 AM Saturday for all Pacific Coast beaches," said the NWS advisory.