FXUS66 KMTR 161817 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 1117 AM PDT Sun Jun 16 2024 ...New AVIATION, MARINE... .SYNOPSIS... Issued at 200 AM PDT Sun Jun 16 2024 Dry and windy with elevated fire concerns into early next week. Seasonal temps and quiet weather midweek. Potential warming trend for late next week. && .SHORT TERM... Issued at 200 AM PDT Sun Jun 16 2024 (Today and tonight) Satellite fog product shows clear skies over much of California. It's June, where is the coastal stratus? For a few days now, we've been talking about pressure gradients leading to stronger winds and drier air. That continues to be the case again tonight into Sunday. No major change to the overall synoptic pattern - an upper low remains near the PacNW and broad upper level ridging remains over Baja/E Central Pacific. The Bay Area and Central Coast remain sandwiched in the middle. Speaking of gradients, the N-S gradients was over -8mb earlier tonight. Anything greater than -7mb is usually a good stratus eraser. The stronger northerly flow happens to be ushering in drier air as well, which is also contributing to less clouds. Latest 24 hr trends continue to indicated RH values in some area 5 to 40 percent drier than last night. Not expecting much of a change in the overall sensible weather over the next 24 hours. Max temps today will be in the uppers to lower 70s for the coast/bays and upper 60s to near 90 across the interior. Winds will be breezy through the afternoon, especially along the coast and any inland gap/pass. Do expect another burst of stronger winds later this evening and overnight as the upper low tightens and moves SE toward the Great Basin. Still not strong enough/widespread for a Wind Advisory, but the marine environment will remain hazardous with very pronounced coastal jets. && .LONG TERM... Issued at 240 AM PDT Sun Jun 16 2024 (Monday through Saturday) To begin the work week temperatures hold steady or cool a few degrees in response to a passing upper level trough. Either way, still seasonably cool for mid-June. One final day of breezy northerly flow as well, before winds finally ease Monday night into Tuesday with weakening pressure gradients. A subtle warming trend begins midweek before a more notable warm up impacts California in the extended. Confidence continues to increase as longer range probabilistic tools and ensemble guidance show ridging with interior heat. Still several days out, but impactful heat will return to the interior by next Friday and linger through the weekend. HeatRisk guidance continues to trend upward with more interior portions reaching the Moderate category. Will need to keep an eye on this as the forecast becomes more clear. && .AVIATION... (18Z TAFS) Issued at 1116 AM PDT Sun Jun 16 2024 VFR through the TAF period with strong, gusty westerly winds beginning this afternoon and continuing into Sunday night. Stratus is expected to stay offshore with only high level clouds moving over the region tonight. Gusts between 25 to 30 knots are possible across the Bay Area and Central Coast today. Locally higher gusts are possible at OAK and SFO which are expected to see gusts between 30 to 37 knots. Forecast vertical wind profiles suggest low level winds (below 3,000 feet) between 30 to 40 knots will continue through 06Z to 07Z after which winds will weaken in the lower levels and at the surface. Breezy to gusty conditions return tomorrow but gusts are not currently expected to be as strong as those forecast today. Vicinity of SFO...VFR through the TAF period with strong, gusty westerly winds through tonight. Gusts between 30 to 37 knots are currently expected with some ensemble guidance suggesting that gusts up to 40 knots are possible. Confidence is high that gusts over 35 knots will develop as stronger low level winds (between 30 to 40 knots) mix down to the surface. Current timing for stronger gusts is from 21Z to 07Z to account for when low level winds begin to strengthen and decrease. Surface winds will weaken, becoming more moderate, after 07Z as low level winds drop off before breezier conditions return tomorrow afternoon. SFO Bridge Approach...Similar to SFO. Monterey Bay Terminals...VFR through the TAF period with gusty west to northwest winds starting this afternoon and continuing into the evening. Westerly winds will weaken by the late evening with light to moderate winds expected overnight. Currently not expecting CIGs to develop at either MRY or SNS tonight but a few models suggested some lower level clouds could develop at MRY. However, confidence was too low to include in MRY TAF so will continue to monitor. && .MARINE... (Today through Friday) Issued at 1116 AM PDT Sun Jun 16 2024 Widespread gale force to at times high end gale force gusts continue into early Monday before diminishing in areal coverage and intensity.Conditions dangerous to small crafts over the coastal waters persists through, at minimum, midweek as widespread strong to near gale force gusts continue over the waters beginning early Monday. Significant wave heights will peak between 12 to 14 feet Sunday into Monday before gradually diminishing to 8 to 11 feet by mid- week. Hazardous conditions over the coastal waters continue through the work week. && .FIRE WEATHER... Issued at 245 AM PDT Sun Jun 15 2024 ...Elevated Fire Weather Conditions Through The Weekend... *Breezy to gusty northerly winds, especially higher terrain *Lowering relative humidity values day and night It goes without saying, but elevated fire weather conditions remain over the district. Yesterday was a prime example of dry northerly flow with receptive fine fuels. The Hernandez Fire burned in San Benito county. One can still see a little be of heat on the satellite imagery. Expect more of the same today with grass fires being the biggest concern. It's Father's Day and you may have outdoor plans - like a BBQ. Just be mindful about any open flame and don't be that "spark" to start the next fire. MM && .MTR WATCHES/WARNINGS/ADVISORIES... CA...None. PZ...Small Craft Advisory from 3 PM this afternoon to 3 AM PDT Monday for SF Bay N of Bay Bridge. Small Craft Advisory until 3 AM PDT Monday for Mry Bay. Gale Warning until 3 AM PDT Monday 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. && $$ SHORT TERM...MM LONG TERM....MM AVIATION...Kennedy MARINE...Kennedy Visit us at www.weather.gov/sanfrancisco Follow us on Facebook, Twitter, and YouTube at: www.facebook.com/nwsbayarea www.twitter.com/nwsbayarea www.youtube.com/nwsbayarea