Swell Matrix

Area Forecast Discussion

National Weather Service San Francisco CA

424 am PDT Wed Jun 19 2024


Issued at 155 PM PDT Tue Jun 18 2024

Upper level trough will dig over California through midweek, with breezy onshore winds continuing and temperatures near seasonal averages prevailing through Thursday. The trough will remain in place, but weaken for Friday and the weekend, with warmer conditions developing once again across the inland areas.


(12z TAFS) Issued at 408 AM PDT Wed Jun 19 2024

MVFR/IFR CIGS have formed along the coast and the Monterey Bay with spotty CIGs over OAK. Expect winds to be light to moderate through the late morning before breezy winds arrive into the afternoon as widespread VFR returns. Winds reduce into Wednesday evening as MVFR and IFR CIGs begin to affect the Monterey Bay and SF Bay terminals with North Bay terminals seeing CIGs later that night.

Vicinity of SFO, VFR lasts through Wednesday evening. Winds Stay moderate through the morning with another round of breezy winds start in the afternoon with peak gusts around 26 kts. These winds reduce into the evening as MVFR CIGs fill over the terminal with these CIGS lasting into late Thursday morning.

SFO Bridge Approach, Similar to SFO.

Monterey Bay Terminals, MVFR/IFR CIGs with light winds last through the late morning before CIGS erode as moderate to breezy winds arrive. Winds at the terminals reduce into the evening as IFR CIGs move inland.


(today through Monday) Issued at 408 AM PDT Wed Jun 19 2024

Expect lighter winds through the rest of Wednesday morning. Northwest winds increase again late Wednesday afternoon across northern waters, remaining gusty through the weekend and into the next work week. Significant wave heights stay around 6-8 feet, will build back up to 10-12 feet towards the end of the the weekend as larger northwesterly swell returns.

Watches, Warnings, Advisories

Ca, none. Pz, small craft advisory from 3 pm Thursday to 3 am PDT Friday for pigeon pt to pt pinos 10-60 nm-pt arena to pt reyes 0-10 nm.

small craft advisory from 3 pm this afternoon to 9 pm PDT this evening for pt pinos to pt piedras blancas 0-10 nm.

small craft advisory from 9 pm this evening to 3 am PDT Friday for pt arena to pt reyes 10-60 nm.

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