, Issued at 111 PM PDT Sat Oct 3 2026 (This evening through Sunday night)
The morning started off with stratus and reduced visibilities starting along the San Francisco coast to the Big Sur Coast. Unfortunately, this was short lived as clouds and fog mixed out right around sunrise, leading to sunny skies for much of the morning. Temperatures have responded accordingly, exceeding their initial forecast earlier this morning. Attempted to adjust them with the late morning forecast package update, but even then some sites will likely exceed their forecast highs. Looking to tomorrow, the forecast should be similar if not hotter meaning temperatures may need to be bumped for coastal locations. For now, opted to keep the Heat Advisory that was issued for Sunday the same and not include the southern portion of the Monterey Bay. However, should temperatures continue to exceed their forecast amount, they may need to be added tomorrow.
All that to be said, we're in the beginning of the heat wave and Moderate to Major HeatRisk is expected for Sunday. Make sure to beat the heat by practicing heat safety. You can visit weather.gov/safety for more information, but here a few quick handy tips.
* 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 111 PM PDT Sat Oct 3 2026 (Monday through next Friday)
The heat continues into the upcoming work week and with confidence increasing in where it'll happen, the Heat Advisory for the interior Bay Area and interior Central Coast has been extended until 10PM Wednesday. Additional areas may need to be added to it, with the highest confidence being for the northern Monterey Bay region. Elsewhere, like San Francisco, Marin, and the southern Monterey Bay, confidence remains moderate to low thus we opted to hold out on extending or adding these beyond Sunday. Nonetheless, it'll be hot, so please continue to take precautions and practice heat safety to avoid heat exhaustion and heat stroke.
Looking at the end of the week, around Friday and into next weekend, ensembles continue to trend towards cooler weather. The current forecast, if we don't stay in a ridging pattern, has much of the region in Minor HeatRisk. Highs continue to trend in the mid 60s to low 70s along the coast, the upper 70s to mid 90s for interior valley locations, and the 80s to mid 90s for higher elevations. Ensembles and guidance show either zonal flow or the beginning of troughing starting to form. Timing and placement is still a bit iffy as to when any sort of trough makes it here, but it's something we'll keep an eye.
(00z TAFS) Issued at 442 PM PDT Sat Oct 3 2026
VFR everywhere with onshore breezes around 6 to 12 kt. Similar to last night, light and variable winds are expected through the overnight hours, which increase again and become onshore by late Sunday morning. Given the shallow marine layer, almost all terminals will remain VFR through the TAF cycle. Low to medium confidence on whether LIFR stratus/fog will develop at HAF and MRY.
Vicinity of SFO, High confidence for VFR conditions to prevail through the TAF period. Northwest to westerly breezes ease by sunset and gradually shift to a bay breeze at SFO early Sunday morning. Northwest winds increase by the afternoon with high clouds cruising through most of the day on Sunday.
SFO Bridge Approach, Minor reductions to visibility (5-6SM HZ) are possible through the afternoon and improve after sunset. Otherwise, similar to SFO.
Monterey Bay Terminals, North to northwesterly breezes persist into the evening with stronger winds at SNS. Overnight, drainage winds settle into the Salinas Valley. MRY has a higher chance of developing LIFR ceilings/fog compared to SNS, though confidence is low to moderate. Strong high pressure persists over the region which will limit the extent of the shallow marine layer. If ceilings or fog develop, it will be short-lived with VFR prevailing by early Sunday morning.
(tonight through next Thursday) Issued at 442 PM PDT Sat Oct 3 2026
Northerly to northwesterly breezes will remain gentle to moderate into much of next week, allowing for slight to moderate seas to persist.
Ca, Heat Advisory until 10 PM PDT Sunday for CAZ006-502-528-529.
Heat Advisory until 10 PM PDT Wednesday for CAZ503-504-506-508- 510-512>518.
PZ, None.
