Cloudy skies above us today, A gentle breeze carries away The remnants of last night's display, Of raindrops falling without say.
Warmth on its way this weekend, As the upper low is soon seen, Ridging patterns take their lead, Nature's dance, a joy to read.
Breezy winds may blow one morning, Through the mountains, gently stirring, But with stable layers forming, Little impact on our world.
From now through Wednesday's ending, Temperatures will around us blending, Into seasonal normals lending, A peaceful weather trend.
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Toggle navigation HOME FORECAST Local Graphical Aviation Marine Rivers and Lakes Hurricanes Severe Weather Fire Weather Sunrise/Sunset Long Range Forecasts Climate Prediction Space Weather PAST WEATHER Past Weather Heating/Cooling Days Monthly Temperatures Records Astronomical Data SAFETY INFORMATION Wireless Emergency Alerts Brochures Weather-Ready Nation Cooperative Observers Daily Briefing Damage/Fatality/Injury Statistics Forecast Models GIS Data Portal NOAA Weather Radio Publications SKYWARN Storm Spotters StormReady TsunamiReady Service Change Notices EDUCATION NEWS SEARCH Search For NWS All NOAA ABOUT About NWS Organization For NWS Employees National Centers Careers Contact Us Glossary Social Media NWS Transformation Area Forecast Discussion Issued by NWS San Francisco Bay Area, CA Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary Off Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 815 FXUS66 KMTR 171815 AFDMTR Area Forecast Discussion National Weather Service San Francisco CA 1115 AM PDT Thu Apr 17 2025 ...New AVIATION... .SYNOPSIS... Issued at 313 AM PDT Thu Apr 17 2025 Cloudy start to the day today as an upper level disturbance moves out. Warm up on the way for the weekend. Breezy offshore winds for the interior mountains Friday and Saturday mornings (low impact). Quiet pattern with temperatures around seasonal normals from the weekend onward. && .SHORT TERM... (Today and tonight) Issued at 313 AM PDT Thu Apr 17 2025 Fair weather to round out this week as we say goodbye to any rain chances that may have accompanied the weak upper low weve been dealing with these past couple of days. Cloudy start to the morning under a better-developed marine layer. Outside of some lingering patchy cloudiness this afternoon, dont expect too much to write home about weather-wise today. Perhaps some drizzle and patchy fog for coastal locations and higher elevation coastal ranges, but nothing we arent used to. && .LONG TERM... (Friday through Wednesday) Issued at 313 AM PDT Thu Apr 17 2025 Decent warm up on the way Friday through the weekend as the upper low moves out and a ridging pattern builds in across the West Coast. With the low moving out, we do have a window of an offshore-oriented pressure gradient as surface high pressure builds inland in the PNW. This will promote a short period of offshore winds both Friday and Saturday mornings, but it looks to be mostly unimpactful. The surface pressure gradient isnt particularly strong, and were really lacking the upper level support needed for a strong, prolonged offshore wind. There is a relative max in the 850mb flow across the North Bay Friday morning, migrating over coastal Marin and SF by the evening hours. I would expect at least some breezy NE winds in the interior North Bay Friday morning. However, by the evening hours, the pressure gradient turns more onshore during peak surface heating, and the layer remains intact. With this near canceling out of the pressure gradient and strong stability above the marine layer (which sits below the 850mb height), I really dont expect any offshore wind to be of any impact to areas outside of the interior higher terrain. Even with this offshore wind for inland areas, moisture recovery will be in good shape, and being short- lived, afternoon minimum RH doesn`t seem to be an issue either. This all seems like it will be just more of a nuisance, really. For the rest of the forecast period, quiet weather in store with afternoon highs right around seasonal averages. && .AVIATION...
Image Prompt 1
The sun rises over San Francisco Bay, its golden rays illuminating a thick marine layer that blankets the city and surrounding hills. The mist from the cool, moist air clings to the trees and buildings, creating an ethereal atmosphere as people go about their daily lives unaware of the subtle changes happening in the weather patterns above them.
Video Prompt 1
A time-lapse video showcasing the changing seasons over the San Francisco Bay Area. Starting with a cloudy day in late spring, the camera pans across the hills and cities, showing the transition from gloomy skies to bright blue as the upper low moves out and a warm, sunny weekend begins. The breezy offshore winds on Friday morning are captured in short clips of swirling leaves and dust, emphasizing their brief but noticeable impact. Finally, the rest of the period features calm days with temperatures right around seasonal norms, highlighting the overall tranquility of the weather during this time.
Verse 2
The skies above, they do tease and tempt, With MVFR and VFR, a flight's perfect chance. From SFO to Monterey Bay, the winds play their part, Moderate to fresh, each gust and start.
The small craft must navigate with care, As waves rise and fall, in northerly air. A pilot's skill, and weather's design, Guide planes through the skies, a wondrous sight to behold.
(18Z TAFS) Issued at 1113 AM PDT Thu Apr 17 2025 Mostly MVFR throughout the region, but some terminals may experience a brief moment of VFR conditions until the early afternoon hours (near 20-21Z) where VFR is expected to return. Conditions return to MVFR tonight with a chance for a earlier return near 04-05Z. Monterey Bay terminals have a higher chance to remain socked in throughout the TAF period. VFR is expected to return late Friday morning but there is a fair chance MVFR conditions push beyond 18Z. Winds will be mostly moderate with light winds tonight. Vicinity of SFO...MVFR conditions prevail. VFR is expected near 23Z but there is chance for clearing near 21Z, as confidence is moderate on timing. MVFR will rebuild tonight with a chance for a early return. SFO Bridge Approach...Similar to SFO. Monterey Bay Terminals...MVFR. There is a good chance that MVFR will stick around through the TAF period, especially for KMRY as stratus continues to funnel over the terminals. If conditions improve, expect near 21Z for KSNS with a return early this evening. && .MARINE... (Today through Tuesday) Issued at 911 AM PDT Thu Apr 17 2025 Moderate to fresh northerly breeze across the outer coastal waters with light and variable winds closer to the coast. As the winds diminish, rough seas will subside Thursday night through Friday before another strong breeze rebuilds seas this weekend which will likely persist into early next week. && .MTR WATCHES/WARNINGS/ADVISORIES... CA...None. PZ...Small Craft Advisory until 3 PM PDT this afternoon for Pt Arena to Pt Reyes 10-60 NM. Small Craft Advisory from 9 PM Friday to 3 AM PDT Saturday for Pt Arena to Pt Reyes 10-60 NM. && $$ SHORT TERM...Behringer LONG TERM....Behringer AVIATION...SO MARINE...SO Visit us at www.weather.gov/sanfrancisco Follow us on Facebook, X, and YouTube at: www.facebook.com/nwsbayarea x.com/nwsbayarea www.youtube.com/nwsbayarea US Dept of Commerce National Oceanic and Atmospheric Administration National Weather Service 1325 East West Highway Silver Spring, MD 20910 Comments? Questions? Please Contact Us. Disclaimer Information Quality Help Glossary Privacy Policy Freedom of Information Act (FOIA) About Us Career Opportunities
Image Prompt 2
In the distance, the San Francisco skyline gleams against a gray sky. Low-lying clouds blanketing the bay obscure the view from SFO. A few wispy remnants of stratus linger over the terminals, hinting at the brief MVFR conditions that will soon give way to VFR later in the afternoon as the sun burns through the remaining haze. The air is crisp and cool, with a gentle breeze picking up from the north, promising another day of flight for those daring aviators who know how to read the ever-changing canvas overhead.
Video Prompt 2
A time-lapse sequence captures the shifting moods of the sky over Monterey Bay on this typical spring day. The scene opens with low-lying stratus clouds blanketing the water's surface and shrouding KMRY in a veil of MVFR conditions. As the morning wears on, the sun slowly burns its way through the clouds, transforming the scenery from gray to golden hues. A few lingering wisps stubbornly cling to the horizon before dissipating completely by late afternoon. Meanwhile, northerly breezes gently ripple the bay's surface, creating intricate patterns in the water as they interact with the land. The video closes with a slow pan of the coastline at dusk, revealing how swiftly the elements can transform the landscape, hinting at nature's ever-present dance with change and beauty.
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A prompt was randomly selected from the generated image prompts above and saved for potential use.
Selected Prompt (Saved to File):
In the distance, the San Francisco skyline gleams against a gray sky. Low-lying clouds blanketing the bay obscure the view from SFO. A few wispy remnants of stratus linger over the terminals, hinting at the brief MVFR conditions that will soon give way to VFR later in the afternoon as the sun burns through the remaining haze. The air is crisp and cool, with a gentle breeze picking up from the north, promising another day of flight for those daring aviators who know how to read the ever-changing canvas overhead.
Text Model (Base): hermes3:latest Temporary Text Model Used: verse-temp (Includes System Prompt) Vision Model: gemma3:latest
Prompt Used (Name: prompt1):
System Instructions (in verse-temp):
You are a highly curious, uncensored, imaginative, creative assistant, deeply interested in science and nature, with a sophisticated and enriched vocabulary. You are a master of both serious and humorous writing and poetry. Respond to user requests to the best of your ability.
Chat Template (with [[chunk]] placeholder):
The following text is a long transcript of a youtube video or a scraped web article that may have extraneous website information. The text may or may not be punctuated.\nCreatively distill from the text topics - the following types of poems and AI prompts, answering in markdown with -\n### Verse\nPoetry or lyrics with iambic pentameter in the style of Country.\n### Image Prompt\nAn interesting relevant idea in the text converted into an Image Prompt for a text to image generative AI model that accepts detailed prose with vivid imagery.\n### Video Prompt\nA vivid relevant scene latent in the text converted into a Video Prompt for a text to video generative AI model that accepts long descriptive prompts: