Issued at 906 PM PDT Sat May 9 2026
We're keeping an eye on the stratus tonight as it is behaving a bit differently than last night. The first noteworthy item being, the blanket of low level clouds over our coastal waters. The second being the inland intrusion of stratus. This should put the marine layer somewhere between 500-1000ft already. The question then becomes, will deepen past 1000-1200ft tonight? Some of the 0Z data shows we could be between 1200-1500ft which could mean more interior valleys see stratus tomorrow morning. We will see more thermal belts, meaning warmer temperatures above the stratus and in higher elevations. For areas that experience the marine layer, tommorow's highs will likely be influenced by it keeping things a bit cooler / similar to what we saw today.
, Issued at 1217 PM PDT Sat May 9 2026 (This evening through Sunday)
Low clouds have treated to the coast as of early this afternoon. Thus, as high pressure aloft continues to build, inland temperatures will be a few degrees warmer compared to yesterday. Thus, afternoon temperatures are forecast to reach into the mid 80s to lower 90s (far inland areas) as high pressure continues to build over the region. The coast will remain cooler, generally in the upper 50s to 60s, thanks to onshore flow and the compressed marine layer.
Tonight, expecting low clouds to return to the coast and adjacent inland valleys (similar to this morning). Again, there is the potential for mist or light drizzle again tonight into Sunday morning, yet widespread measurable rainfall is highly unlikely.
Sunday will feature similar temperatures as Saturday as the mid/upper level ridge shifts into southern California, Nevada, and Arizona. Low clouds that do develop inland will quickly retreat to the coast Sunday by midmorning giving way to mostly sunny skies inland.
..issued at 1217 PM PDT Sat May 9 2026 (Sunday night through next Friday)
Low clouds persist near the coast and will return inland Sunday night, however less widespread across the interior valleys. Monday is still on track to be the warmest of the week as interior areas reach Moderate HeatRisk as the high pressure strengthens over the Desert Southwest. Temperatures by Monday afternoon are forecast to be in the low to upper 90s across the interior, mid 80s to low 90s across inland away from the coast, and low 70s to mid 80s near coastal locations. The cooler conditions near the coast will be due to the marine layer not completely going away and continued onshore winds.
Temperatures are forecast to cool slightly by Tuesday, however will still remain some 5-15 degrees above seasonal averages. There is increasing confidence that a cut-off low pressure system will approach from the eastern Pacific by midweek, bring cooler and unsettled weather to the region for the remainder of the upcoming week. This will work to push the mid/upper level ridge across the Desert Southwest farther to the east. Not expecting much widespread measurable rainfall, however this pattern would be more favorable for drizzle and/or light rain. There are still differences in model guidance about the strength and southern extent of the mid/upper level trough by midweek. Late in the week, more zonal flow is forecast to develop over the region. Be sure to check back for the latest forecasts as we gain more reliable short range guidance.
(06z TAFS) Issued at 1005 PM PDT Sat May 9 2026
Tonight, stratus is a bit more expansive, perhaps somewhere between 500-1000ft already, with IFR conditions along the coast and at KSFO already and MVFR cigs near KOAK. Expect the stratus to continue to move inland and deepen some, impacting North Bay terminals after midnight and into tomorrow morning. MVFR to IFR cigs are expected and should clear out mid to late morning. For the interior East Bay terminals, the stratus deck will move through overnight resulting in MVFR ceilings until Sunday morning. IFR ceilings persist at HAF through the night with moderate NW winds. By mid-day Sunday, ceilings will lift through the afternoon. The stratus deck is set to return again in the evening. The high-level clouds that are expected Sunday afternoon should also limit the development of the stratus deck for the interior East and North Bay terminals.
Vicinity of SFO, Breezy westerly winds with gusts of 18-22kt will be lasting through 8Z. Stratus has locked in around the Bay, with cigs ranging from IFR to MVFR. Confidence is high that we will remain locked in with stratus tonight; however, there is some uncertainty with how long we will be stuck with IFR cigs. Opted to lean more pessimistic based on satellite imagery, webcams, and the KSFO METAR so far. We could break to MVFR cigs for a period on Sunday morning, before VFR conditions return by mid to late morning. Breezy westerly winds looks to be on tap again for Sunday, with gusts to 22KT from 20-03Z. High clouds move in tomorrow afternoon and evening. This may limit stratus development Sunday evening into Monday morning. Opted to hint at a later arrival, but this may need to be adjusted.
SFO Bridge Approach, Similar to SFO.
Monterey Bay Terminals, Widespread IFR ceilings are forecast through the night which will scatter out by late morning Sunday. MRY will experience another return of MVFR stratus Sunday evening. Moderate onshore winds persist through the first half of the TAF period with a slight ease overnight before picking up again late Sunday morning. High-level clouds will also roll in Sunday afternoon, limiting the extent and depth of the marine layer into
(tonight through next Friday) Issued at 906 PM PDT Sat May 9 2026
Moderate seas and fresh to strong northwest breezes with occasional near gale force gusts will continue through most of Sunday. Locally gusty conditions are likely across the San Pablo and San Francisco Bays where terrain promotes wind funneling. Winds gradually ease starting late Sunday with a gentle to moderate northwesterly breeze expected early to mid week. Breezy conditions return to the inner waters late week and seas build mid to late week.
Ca, None. PZ, Small Craft Advisory from 3 PM to 9 PM PDT Sunday for Mry Bay.
Small Craft Advisory until 3 AM PDT Monday for Pt Arena to Pt Reyes 0-10 nm.
Small Craft Advisory until 9 PM PDT Sunday for Pigeon Pt to Pt Pinos 0-10 nm-Pigeon Pt to Pt Pinos 10-60 NM-Pt Pinos to Pt Piedras Blancas 0-10 nm-Pt Reyes to Pigeon Pt 0-10 nm.
Small Craft Advisory until 9 AM PDT Monday for Pt Arena to Pt Reyes 10-60 NM.
