{"slug": "coastal-flood-advisory-active-for-san-francisco-county-from-thursday-to-thursday", "title": "Coastal flood advisory active for San Francisco County from Thursday to Thursday", "summary": "The National Weather Service issued a coastal flood advisory for San Francisco County from July 9 to July 16, warning of up to 1.7 feet of inundation above ground level in low-lying areas near shorelines and tidal waterways. The advisory highlights dangerous conditions including sneaker waves, strong rip currents, and large breaking waves, urging residents to stay off waterside infrastructure and avoid the ocean.", "body_md": "**Getting your**\n\n[Trinity Audio](//trinityaudio.ai)player ready...San Francisco County is under a coastal flood advisory which was issued by the National Weather Service on Tuesday at 9 p.m. The advisory is valid from Thursday, Jul. 9 until Thursday, Jul. 16.\n\n“Up to 1.7 ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways,” can be anticipated according to the [NWS San Francisco CA](https://www.weather.gov/mtr/). “At the San Francisco tidal gauge, high tide is expected to be 0.9 ft above normal (6.7 ft MLLW) at 7:25 p.m. 7/9, 1.2 ft above normal (7.0 ft MLLW) at 8:17 p.m. 7/10, 1.5 ft above normal (7.3 ft MLLW) at 9:11 p.m. 7/11, 1.7 ft above normal (7.5 ft MLLW) at 10:06 p.m. 7/12, 1.7 ft above normal (7.5 ft MLLW) at 11:01 p.m. 7/13, 1.6 ft above normal (7.4 ft MLLW) at 11:55 p.m. 7/14, 1.3 ft above normal (7.1 ft MLLW) at 12:48 a.m. 7/16. These predictions include both astronomical tides and roughly 3-6 inches of additional water mainly from a combination of thermal expansion and accumulated sea level rise since the tidal datum was established (1983-2001). High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively.”\n\n“Dangerous conditions are forecast along the shoreline. Hazards include sneaker waves, strong rip currents, and large breaking waves. High tide flooding of lots, parks, and roads with only isolated road closures expected,” according to the NWS. “Stay off of jetties, piers, rocks, and other waterside infrastructure. Remain out of the water to avoid hazardous surf and NEVER turn your back on the ocean If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.”\n\n### How to use a sandbag and where to get sandbags in your area:\n\n[Follow these instructions on how to use sandbags](https://www.mercurynews.com/2023/01/02/bay-area-storm-best-way-to-use-sandbags-and-other-flood-preparation-tips/) and other flood preparation tips to protect your home, and click on the links below to get sandbags in your county:\n\nWhere to get sandbags in [San Mateo County ](https://www.smcgov.org/publicworks/sandbags)\n\nWhere to get sandbags in [Alameda County](https://www.acpwa.org/prepare-for-winter-storms.page)\n\nWhere to get sandbags in [Santa Clara County](https://www.valleywater.org/flooding-safety/flood-ready/sandbags)\n\n### Breaking down weather alerts: advisories, watches, and warnings\n\n**Flash flood warning: Take action. **\n\nA flash flood warning is issued when a flash flood is imminent or occurring. If you are in a flood-prone area, move immediately to high ground. A flash flood is a sudden violent flood that can take from minutes to hours to develop. It is even possible to experience a flash flood in areas not immediately receiving rain.\n\n**Flood warning: Take action. **\n\nA flood warning is declared when flooding is on the verge of happening or is already underway.\n\n**Flood advisory: Be aware. **\n\nA flood advisory is released when flooding is not expected to reach a severity level necessitating a warning. Nonetheless, it can still cause considerable inconvenience and, without exercising caution, potentially lead to situations that threaten life and/or property.\n\n**Flood watch: Be prepared. **\n\nA flood watch is issued when conditions are favorable for flooding. It doesn’t guarantee that flooding will occur, but it signifies that the possibility exists.\n\n### Keeping safe during floods: Expert advice from the NWS\n\nFloods can pose a significant threat, especially if you live in a flood-prone area or find yourself camping in a low-lying region. To ensure your safety, the NWS offers essential flood safety guidelines:\n\n**Move to higher ground:**\n\nIf you’re in a flood-prone area, or if you’re camping in a low-lying spot, move to higher ground as a first step.\n\n**Follow evacuation orders:**\n\nIf local authorities issue an evacuation order, heed it promptly. Prior to leaving, secure your home by locking it.\n\n**Disconnect utilities and appliances:**\n\nIf time permits, disconnect your utilities and appliances. This precaution minimizes electrical hazards during flooding.\n\n**Steer clear of flooded basements and submerged areas:**\n\nSteer clear of basements or rooms where water has submerged electrical outlets or cords. This helps prevent electrical accidents.\n\n**Evacuate promptly for safety:**\n\nIf you notice sparks or hear buzzing, crackling, snapping, or popping noises, evacuate immediately. Avoid any water that may be charged with electricity.\n\n**Refrain from walking in floodwaters:**\n\nNever attempt to walk through floodwaters, even if they appear shallow. Just 6 inches of fast-moving water can forcefully sweep you off your feet.\n\n**Seek higher ground when trapped:**\n\nIn the event you become trapped by moving water, make your way to the highest point available and contact emergency services by calling 911.\n\nWhen heavy rain occurs, there is a potential for flooding, particularly in areas that are low-lying or prone to floods. It is crucial to never drive through water on the road, even if it appears shallow. According to the NWS, as little as 12 inches of fast-flowing water can carry away most vehicles. Stay safe by being prepared and informed.\n\nFor more weather alerts in the Bay Area, visit [Weather Advisories](/weather-advisory/)\n\nSourcing & Methodology\n\nThis article was generated by software that analyzes National Weather Service warnings and advisories and creates an article based on templates created by humans. Our data comes from publicly available information. You can report errors to content@bayareanewsgroup.com", "url": "https://wpnews.pro/news/coastal-flood-advisory-active-for-san-francisco-county-from-thursday-to-thursday", "canonical_source": "https://www.mercurynews.com/2026/07/07/coastal-flood-advisory-active-for-san-francisco-county-from-thursday-to-thursday/", "published_at": "2026-07-08 04:04:49+00:00", "updated_at": "2026-07-08 04:30:32.951569+00:00", "lang": "en", "topics": ["ai-safety"], "entities": ["National Weather Service", "San Francisco County", "San Francisco Bay", "Pacific Coast"], "alternates": {"html": "https://wpnews.pro/news/coastal-flood-advisory-active-for-san-francisco-county-from-thursday-to-thursday", "markdown": "https://wpnews.pro/news/coastal-flood-advisory-active-for-san-francisco-county-from-thursday-to-thursday.md", "text": "https://wpnews.pro/news/coastal-flood-advisory-active-for-san-francisco-county-from-thursday-to-thursday.txt", "jsonld": "https://wpnews.pro/news/coastal-flood-advisory-active-for-san-francisco-county-from-thursday-to-thursday.jsonld"}}