Issued at 842 AM PDT Thu Jun 4 2026
Visible satellite this morning shows a tale of two stories, sunshine or clouds. If you're north of the Golden Gate you have clear skies and south a marine layer stratus push. It's also interesting to see stratus push inland across the complex terrain of the Central Coast. This morning clearly demonstrates that every little nook and cranny of the Salinas Valley was getting a taste of clouds - the atmosphere is a fluid and the stratus is a liquid getting "poured" into a topographic mold.
What's in store for the rest of the day? Already seeing clearing across the Santa Clara Valley. Salinas Valley will follow with Sun by late morning. Mild along the coast, but if you want a taste of summer head way inland with highs in the 80 to mid 90s. Beach weather? Kinda, some Sun, but do expect the winds to crank up this afternoon. Interior locations will be breezy too, but not as windy as yesterday.
No update needed at this time.
MM
, Issued at 1255 AM PDT Thu Jun 4 2026 (Today and tonight)
Strong mid to upper level high pressure i.e. 500 mb height 589 decameters and moderate northerly 6.7 mb ACV-SFO and onshore 3.4 mb SFO-SAC surface pressure gradients prevail early this morning. The marine layer depth varies from 1000 feet to locally 2000 feet. The surface pressure gradients and cool air advection are producing gusty wind flow trapped beneath the upper level high's lower level temperature inversion with a varying focus of onshore winds through the coastal gaps.
With early June solar input and the close proximity of the lower level temperature inversion with the strong mid to upper level high pressure system, daytime high temperatures will warm back up above normal today. Forecast highs today upper 60s to lower 70s coastside to the 80s and 90s far inland.
..issued at 1255 AM PDT Thu Jun 4 2026 (Friday through Wednesday)
With strong mid to upper level high pressure prevailing Friday, daytime highs will warm back up to above normal with warmest to hottest inland temperatures reaching the 80s and 90s. On Saturday the upper level high will begin to weaken, daytime highs will begin to trend lower with inland highs mainly in the 70s and 80s. Sunday's temperatures will be a repeat of Saturday's temperatures.
Additional cooling Monday through Wednesday will lower daytime high temperatures a few more degrees with 70s well inland except in the 80s southern interior. Recent GFS and to some extent the ECMWF have been showing a trough arriving with some measurable rainfall early next week. With a strong late season meridional temperature gradient, ongoing negative (cool) phase Pacific Decadal Oscillation and moisture tap back to the western Pacific, it'll be interesting to see if e.g. the recently wetter solution GFS verifies.
(18z TAFS) Issued at 1147 AM PDT Thu Jun 4 2026
Widespread VFR conditions as the last bit of stratus clears from the coastline. Clear skies and gentle to moderate breezes (generally from the west but locally driven) dominate the TAF period, with a couple of sites experiencing strong gusts in excess of 20kts. Coastal sites will see another round of stratus coverage tonight with IFR-MVFR ceilings. Currently, there is low confidence on how widespread stratus will be at HAF so, decided to leave it as FEW- SCT015 beginning tonight ~10pm PDT. The low to mid level airmass off the coast remains dry with satellite currently showing a wide gap in cloud coverage to the west.
Vicinity of SFO, VFR through the TAF period. Westerly winds pick up to moderate strength by the early afternoon. Gusts in excess of 20kts will also begin by then and persist until ~9pm PDT. Winds diminish to gentle breezes overnight into Friday morning, though they are expected to increase again to moderate strength by early Friday afternoon.
SFO Bridge Approach, NW to W moderate winds with strong gusts similar to that of SFO prevail into the evening. Winds diminish to a light breeze (~6kts) a bit earlier than SFO and become variable overnight. Aligns with SFO again by late Friday morning.
Monterey Bay Terminals, VFR through the afternoon until the stratus deck returns again this evening. The marine layer will become ~1000 feet deep overnight which will bring borderline IFR-LIFR ceilings at MRY around 9pm PDT and IFR ceilings at SNS around midnight. MVFR ceilings are expected by Friday morning at both terminals as the marine layer begins to erode. Onshore gentle breezes will prevail through the TAF period.
(today through Tuesday) Issued at 444 AM PDT Thu Jun 4 2026
Hazardous conditions for small craft continue through the weekend. Gale force gusts are expected across the outer waters and along the coastal jet regions. Moderate to rough seas will continue to build through tomorrow to become rough to very rough for the inner and outer waters. Conditions will slowly begin to improve Monday as northwesterly winds diminish to become fresh to strong and seas abate to become moderate.
Ca, None. PZ, Small Craft Advisory from 3 PM this afternoon to 9 PM PDT this evening for Mry Bay.
Gale Warning until 9 AM PDT Friday for Pigeon Pt to Pt Pinos 10- 60 NM-Pt Arena to Pt Reyes 0-10 nm-Pt Arena to Pt Reyes 10- 60 NM.
Small Craft Advisory until 3 AM PDT Friday for Pigeon Pt to Pt Pinos 0-10 nm-Pt Reyes to Pigeon Pt 0-10 nm.
Small Craft Advisory until 9 AM PDT Friday for Pt Pinos to Pt Piedras Blancas 0-10 nm.
