, Issued at 1137 PM PDT Mon Mar 23 2026 (Tonight through Wednesday)
Currently clear skies on satellite with just a few high clouds drifting across the North Bay and Central Coast. Confidence is low that stratus will be able to develop overnight given the rebuilding ridge and compressed marine layer. A look at the current RH values shows fairly dry conditions across the region which further decreases confidence that stratus will be able to develop tonight. High resolution guidance (HREF, HRRR) both support clear skies continuing through the rest of the night with fog not anticipated to develop.
Seasonal to slightly above normal temperatures continue on Tuesday as ridging rebuilds over the Western United States. This will see a continuation of high temperatures in the 70s to low 80s across the interior and 60s to 70s along the coastline. Interior Monterey and San Benito counties remain the warmest locations with high temperatures in the mid to upper 80s. Minor HeatRisk continues through the end of the week. This primarily impacts those who are extremely sensitive to heat with minimal impacts expected for the population at large. Overnight low temperatures will be in the upper 40s to 50s across the region.
..issued at 1137 PM PDT Mon Mar 23 2026 (Wednesday night through next Monday)
While still above normal, temperatures are expected to cool slightly (3-6 degrees) Wednesday compared to Tuesday. High temperatures across the board Wednesday and Thursday will be in the 70s across the interior, 60s along the coast, and mid 80s across the interior Central Coast. Why are temperatures cooling? Glad you asked. While the upper level ridge is currently rebuilding over the West Coast, it won't stay centered over southern California for very long. A cut- off low is expected to merge back into the jet stream and move through California (becoming a weak upper level trough) Wednesday into Thursday. This trough will displace the center of the ridge and warmest temperatures eastward. At the same time, a deep upper level trough and surface low pressure system will make their way into the Pacific Northwest Tuesday into Wednesday. The trailing cold front associated with this system will extend southwards into California and reach the Bay Area Wednesday/Thursday. While the front does fall apart as it moves through the Bay Area, it will bring a cooler airmass with it that will help to keep our temperatures cooler. It is expected to be a dry frontal passage so don't get too hopeful for rain just yet. At most we may see some drizzle on Wednesday over the marine environment. More notably, we can expect winds across the marine environment to strengthen with widespread gale force gusts across the outer waters Wed-Thurs. Gusty onshore winds (20-35 mph) will spread along the coastline and across the higher elevations Wednesday into Thursday as cold frontal passage occurs. Temperatures remain fairly consistent in the 70s to low 80s across the interior and 60s to 70s along the coast Friday through the remainder of the weekend. A potential pattern change remains possible early next week as a deep upper level trough remains on track to approach the West Coast. This system will bring us our next chance of light rain.
Moderate offshore (NE) winds look to develop across the North Bay Interior Mountains Thursday into Friday as high pressure strengthens across the Intermountain West and thermal troughing develops over CA. The strongest winds should stay over the higher elevations/along the ridgeline with gusts between 30 to 40 mph expected. Fire concerns remain low at this time but smaller fuels (grass) are curing due to the recent abnormally hot temperatures.
(12z TAFS) Issued at 415 AM PDT Tue Mar 24 2026
Strong to record breaking strong 500 mb heights and lower to mid level thermal ridging (for Oakland upper air soundings in late March since 1948) i.e. subsidence continues to keep conditions clear /VFR/. Cooler air is undercutting the ridge within a shallow layer closest to the sea surface and there is nocturnal radiative cooling in the valleys. It's a near high confidence VFR forecast for the 12z TAFs, except patchy fog and/or low stratus /LIFR-IFR/ may form along the immediate coastline tonight and Wednesday morning.
Vicinity of SFO, VFR. Light and variable wind becoming westerly 10 to 20 knots in the afternoon and evening. Light westerly wind tonight becoming light and variable Wednesday morning.
SFO Bridge Approach, Similar to SFO.
Monterey Bay Terminals, VFR. East to southeast winds 5 to 15 knots becoming west 10 to 15 knots in the afternoon. Light southeast winds developing tonight and Wednesday morning.
(today through Sunday) Issued at 335 AM PDT Tue Mar 24 2026
Moderate to fresh northwesterly breezes and moderate seas will prevail through today. Strong to near gale northerly winds will develop Wednesday into Thursday with gale force gusts expected for the inner waters and outer waters. Rough to very rough seas will build as a result. Conditions improve by Friday.
Ca, None. PZ, Small Craft Advisory from 3 PM to 9 PM PDT Wednesday for Mry Bay.
Small Craft Advisory from 9 AM to 9 PM PDT Wednesday for 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 Pinos to Pt Piedras Blancas 0-10 nm-Pt Reyes to Pigeon Pt 0- 10 nm.
Small Craft Advisory from 3 PM this afternoon to 9 PM PDT this evening for Pt Pinos to Pt Piedras Blancas 0-10 nm.
Gale Watch from Wednesday evening through Thursday afternoon for Pt Arena to Pt Reyes 10-60 NM.
