Swell Matrix

Area Forecast Discussion

National Weather Service San Francisco CA

1117 am PDT Fri apr 19 2024

Synopsis

Issued at 215 AM PDT Fri Apr 19 2024

Cooler conditions are expected today and tomorrow with light drizzle possible each morning. Temperatures rebound late weekend and early next week. A return to unsettled conditions arrives Tuesday and persist throughout late next week.

Aviation

(18z TAFS) Issued at 1117 AM PDT Fri Apr 19 2024

Stratus continues to linger throughout portions of the Bay Area with conditions ranging from VFR to MVFR-IFR. Satellite imagery shows stratus is dissipating along the Central Coast with VFR to return within the next hour. Satellite shows dissipating stratus in the North Bay remains slightly more widespread but VFR conditions are expected to return in the next 1 to 2 hours. After stratus dissipation, VFR will prevail through the late evening/early night with stratus and MVFR to IFR returning overnight. Light to moderate winds primarily out of the W.

Vicinity of SFO, VFR conditions through the end of the TAF. Guidance indicates that stratus may return between 08-16Z but confidence was low. Stratus previously developed at SFO from 11-14Z this morning. If persistence holds true, stratus may develop early tomorrow morning but as of now confidence was too low to include in TAF. Light northerly to northeasterly winds at SFO will transition more northwesterly to westerly through the TAF period with moderate winds to return during the afternoon.

SFO Bridge Approach, Similar to SFO.

Monterey Bay Terminals, VFR to MVFR-IFR overnight. Stratus continues to linger over portions of the Central Coast with VFR conditions to fully return at MRY and SNS within the next hour. Stratus will return late this evening through mid tomorrow morning. Moderate confidence given guidance and persistence that IFR conditions will develop at MRY and SNS overnight. Guidance indicates some potential for LIFR overnight but confidence remains low. Primarily light to moderate winds out of the west at MRY and winds out of the west to northwest at SNS.

Marine

(today through Wednesday) Issued at 1117 AM PDT Fri Apr 19 2024

Light to moderate breezes out of the northwest and fair weather prevail over much of the waters through at least Saturday afternoon. Come the evening of Saturday, northwesterly winds increase to become strong and gusty. Swell builds into Sunday out of the northwest as gusty conditions continue but looks to diminish towards the middle part of the next week. Light southerly swell continues to move through the waters this weekend and through the next work week.

Watches, Warnings, Advisories

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

small craft advisory from 9 am to 9 pm PDT Saturday for pt pinos to pt piedras blancas 0-10 nm.

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