Area Forecast Discussion
Issued by NWS San Francisco Bay Area, CA
Issued by NWS San Francisco Bay Area, CA
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678 FXUS66 KMTR 061939 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 1239 PM PDT Thu Jun 6 2024 ...New SYNOPSIS, SHORT TERM, LONG TERM... .SYNOPSIS... Issued at 1215 PM PDT Thu Jun 6 2024 Slightly cooler temperatures today with a further cool down into the weekend. Another warming trend on the way for early next week. && .SHORT TERM... (This evening through Friday) Issued at 1215 PM PDT Thu Jun 6 2024 Mid day temperatures running anywhere from 3 to 15 degrees cooler than yesterday depending on location. Thanks to the upper level ridge migrating eastward and a transient shortwave trough moving into the West Coast. This is evident in not only the marked decrease in temperatures, but via vertical profilers showing a deepening of the marine layer as large scale subsidence diminishes. Overnight lows tonight are expected to be about 1-5 degrees cooler than last night, and highs Friday look to be about 3-6 degrees cooler than today...unless you`re along the coast, in which the only noticeable difference day-to-day will be increased overnight cloud cover and potentially morning drizzle into the weekend. && .LONG TERM... (Friday night through next Wednesday) Issued at 1215 PM PDT Thu Jun 6 2024 Things stay pretty quiet through the weekend. Onshore flow and slightly above average temperatures prevail, and guidance hints at a deeper upper level trough associated with the deep low in the Gulf of Alaska sitting offshore of the West Coast into the start of next week. As previously mentioned, this will likely just result in increased cloud cover along the coast and AM drizzle for coastal and high elevation locations through Sunday. By Monday, the trough begins to break down and become replaced by another ridge pattern, which leads to our next warm up. At the moment, ensemble guidance is leading us to believe that it will not be quite as warm as the last couple of days, but it is a period we`re watching for potential highlights with Tuesday looking like the peak based on this forecast issuance. && .AVIATION... (18Z TAFS) Issued at 1033 AM PDT Thu Jun 6 2024 VFR prevails across all terminals late this morning and is expected to persist through the remainder of the afternoon and evening hours. Low stratus cloud field continues to gradually build and expand over the water and will eventually begin to fill in over coastal locations after midnight tonight and continue through the remainder of the forecast period. Vicinity of SFO...VFR is expected to prevail through the the afternoon and evening hours with gusty winds later today beginning to ease after sunset. Low stratus ceilings are expected to build in during the overnight/pre-dawn hours and persist into Friday afternoon. SFO Bridge Approach...Similar to SFO. Monterey Bay Terminals...VFR is expected to persist this afternoon and evening with low stratus clouds encroaching on the terminals at times. LIFR/IFR conditions are expected after sunset, likely to persist through the remainder of the forecast period tomorrow. && .MARINE... (Tonight through next Tuesday) Issued at 220 AM PDT Thu Jun 6 2024 Expect breezy northerly winds to persist through the day before gradually easing into Friday. These winds along with rough seas will lead to hazardous conditions for small craft. A moderate period Northwest swell will continue impact the coastal waters but will diminish Friday through Saturday before waves build again towards the end of the period. && .BEACHES... Issued at 222 AM PDT Thu Jun 6 2024 A Beach Hazards Statement is in effect through Thursday evening. Forecast remains on track. Moderate period swell is entering the coastal waters at 14-17 seconds with heights varying 7-11 feet. The would generate breaking waves of 8-15 feet with locally higher waves at favored break points. Sneaker waves can run over 100 ft up a dry beach, pulling people in the water from rocks, jetties, and beaches. Inexperienced swimmers should stay out of the water. Observe the ocean for 20 minutes before relaxing on the beach. The hot weather inland will lead to more people visiting the beach this week. Know where lifeguards are, obey their instructions, and never turn your back on the ocean! && .MTR WATCHES/WARNINGS/ADVISORIES... CA...Beach Hazards Statement until midnight PDT tonight for CAZ006- 505-509-530. Heat Advisory until midnight PDT tonight for CAZ503-504-506-510- 512>516-518. PZ...Small Craft Advisory until 3 AM PDT Friday for Pt Arena to Pt Reyes 0-10 nm. Small Craft Advisory until 9 PM PDT this evening for Pigeon Pt to Pt Pinos 10-60 NM-Pt Reyes to Pigeon Pt 0-10 nm. Small Craft Advisory until 3 PM PDT Friday for Pt Arena to Pt Reyes 10-60 NM. && $$ SHORT TERM...Behringer LONG TERM....Behringer AVIATION...JM MARINE...Behringer 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