, Issued at 138 AM PDT Wed Mar 11 2026 (Today through Friday)
Our region will be on the eastern periphery of upper-level shortwave ridging across the Eastern Pacific Ocean through Thursday. As a result, a quick warmup will ensue with temperatures around 15 degrees above normal away from the immediate coast. Fortunately the location of the ridge will still allow for onshore flow which will keep things comfortable at night and temperatures from running away. The only record high in jeopardy in the short term is SJC on Thursday with a maximum temperature forecast of 81 degrees which would tie the record from 2007. A passing subtle upper-level shortwave trough will tamp down the ridge and reinforce onshore flow, pressing pause on the warming trend on Friday. Of most impact in the short term will be minor HeatRisk. To mitigate your risk: increase hydration with water, reduce time spent outdoors or stay in the shade when the Sun is strongest, and open windows at night and use fans to bring cooler air inside buildings.
..issued at 138 AM PDT Wed Mar 11 2026 (Saturday through Tuesday)
Global ensemble clusters are in agreement that an anomalously high amplitude upper-level longwave ridge will begin to move into the region from the Eastern Pacific Ocean on Saturday. As the aforementioned ridge encroaches our area Sunday, this will veer winds to become northerly which will only act to further warm and dry the region. The axis is expected to be overhead on Tuesday, which will yield the hottest day of the forecast period. While beyond the official seven day forecast, there is uncertainty in the evolution of the ridge. Even with the uncertainty, global ensemble clusters illustrate that it is likely that we will be dealing with anomalously high heights through Thursday of next week. To put this into context, we will be in record breaking territory Sunday through Tuesday. This is not just with temperatures (read the CLIMATE section below), but monthly records for 850 mb temperatures and 500 mb heights which are both good indicators for the type of air mass that we are dealing with. Impacts wise, widespread minor HeatRisk on Saturday will give way to areas of moderate HeatRisk Sunday through Tuesday. To mitigate your risk: reduce time in the Sun during the warmest part of the day, stay hydrated with water, stay in a cool place during the heat of the day, move outdoor activities to cooler times of the day, and for those without a/c, use fans to keep air moving and open windows at night.
(12z TAFS) Issued at 431 AM PDT Wed Mar 11 2026
Mainly dry northwesterly winds continue to result in VFR. A patch or two of stratus /LIFR-IFR/ may develop along the immediate coast this morning, otherwise VFR is forecast.
Vicinity of SFO, VFR. West wind 5 knots increasing to 10 to 13 knots in the afternoon and early evening. West wind 5 knots tonight becoming light and variable Thursday morning.
SFO Bridge Approach, Similar to SFO.
Monterey Bay Terminals, VFR. Light southeast wind through morning then winds shifting to onshore 10 knots during the afternoon and early evening. Light southeasterly winds redevelop tonight and Thursday morning.
(today through Monday) Issued at 424 AM PDT Wed Mar 11 2026
Surface high pressure will continue over the coastal waters and offshore waters through late week and the weekend. This will result in fresh to strong northerly breezes and rough seas.
Ca, None. PZ, Small Craft Advisory from 3 PM this afternoon to 3 AM PDT Thursday for Pt Pinos to Pt Piedras Blancas 0-10 nm.
Small Craft Advisory until 3 PM PDT Thursday for Pt Arena to Pt Reyes 10-60 NM.
