Issued at 939 AM PDT Tue Oct 6 2026
Patches of fog linger at the immediate coast, but the widespread dense fog has retreated with solar heating and the Dense Fog Advisory has been allowed to expire. Have lowered today's and Wednesday's high temperatures at the immediate coast with the upcoming forecast update to address the blend running warmer than the observations, which will be expanded upon in the forthcoming full AFD update.
DialH
, Issued at 155 AM PDT Tue Oct 6 2026 (Today and tonight)
A shallow and compressed marine layer confined to the coast most of Monday afternoon has made some slight progress inland over the Russian River Valley, city of San Francisco and Monterey Bay into the Salinas Valley into the overnight hours. The low ceilings/patchy fog may limit visibility down to 1/2mi or less overnight into early Tuesday morning. The ridging pattern over our area will continue to be reinforced today and tonight in the wake of the weak disturbance that shifted east yesterday. Moderate HeatRisk continues to be the primary concern in the short term forecast along with elevated fire weather conditions, especially for higher elevation locations due to hot and dry conditions.
Follow these tips to avoid heat exhaustion and heatstroke:
* Stay hydrated and drink plenty of fluids. * Wear lightweight, light-colored clothing. * Reduce time spent outdoors or stay in the shade. * Never leave people or pets unattended in vehicles. * Use sunscreen if going to the coast or the pool.
..issued at 155 AM PDT Tue Oct 6 2026 (Wednesday through Monday)
Wednesday and Thursday will see similar temperatures as today, however improved onshore flow developing during the day on Thursday will mark the beginning of a return to more normal or slightly below normal temperatures for Friday into the weekend. Another weak upper level disturbance will develop offshore similar to this past weekend, however its fate appears to be a merger with the remnants of Rachel. While Rachel and that disturbance merge, a more potent trough embedded in the Polar Jet will lift Rachel's remnants into the desert southwest while providing us with a potential 'inside slider'. Whether the energy associated with the Polar Jet increases onshore flow (deterministic GFS) or an inside slider (deterministic ECMWF), we're going to see dry and gusty winds develop over the weekend potentially increasing fire weather concerns, with the inside slider scenario possibly leading to another warm- up. The gusty winds over the East Bay may approach wind advisory levels Saturday morning albeit at high elevations. Unfortunately we continue to be dry through the extended forecast.
(18z TAFS) Issued at 1042 AM PDT Tue Oct 6 2026
After some LIFR conditions early this morning impacting Monterey Bay Region and HAF, conditions have improved. Expecting mostly VFR today all terminals with IFR/LIFR for HAF due to lingering marine layer. High pressure remains overhead compressing the marine layer again tonight. Shallow moist layer will inch inland leading to higher conf for IFR to LIFR for Monterey Bay Region and HAF. Airport mins are poss for MRY/SNS. Conf was less than 15-20% for other terminals therefore didn't include any low clouds/fog.
Vicinity of SFO, VFR through the period. NE flow into the afternoon less than 10 kts then onshore for afternoon/evening rush. Likely see a NE push again Wednesday AM.
SFO Bridge Approach, Similar to SFO.
Monterey Bay Terminals, VFR through this evening, but as noted above expect shallow CIGs/FG to return. Higher conf on impacts to SNS, but conf high enough to mention for MRY as well.
(today through Sunday) Issued at 939 AM PDT Tue Oct 6 2026
High pressure off the Pacific Northwest Coast and low pressure near Southern California will maintain gentle to moderate northerly breezes through Thursday. Northerly breezes will then increase strong to very strong Friday into Saturday, bringing widespread hazardous conditions for small craft. Frequent gale force gusts are likely across the northern waters during this time. Moderate seas will prevail through Thursday, building to become rough to very rough Friday into Saturday.
Ca, Heat Advisory until 10 PM PDT Thursday for CAZ503-504-506-508- 510-512>518.
Coastal Flood Advisory until 1 PM PDT Thursday for CAZ506.
PZ, None.
