{ "lid": "SMFF1", "usgsId": "", "reachId": "", "name": "Tide Station at St Augustine Municipal Marina (in MHHW)", "description": "", "rfc": { "abbreviation": "SERFC", "name": "Southeast River Forecast Center" }, "wfo": { "abbreviation": "JAX", "name": "Jacksonville" }, "state": { "abbreviation": "FL", "name": "Florida" }, "county": "St. Johns", "timeZone": "EST5EDT", "latitude": 29.8913888888889, "longitude": -81.3097222222222, "pedts": { "observed": "HCIRP", "forecast": "" }, "status": { "observed": { "primary": -2.31, "primaryUnit": "ft", "secondary": -999, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-11-06T01:59:00Z" }, "forecast": { "primary": -999, "primaryUnit": "", "secondary": -999, "secondaryUnit": "", "floodCategory": "fcst_not_current", "validTime": "0001-01-01T00:00:00Z" } }, "flood": { "stageUnits": "ft", "flowUnits": "cfs", "categories": { "major": { "stage": 3.7, "flow": -9999 }, "moderate": { "stage": 2.5, "flow": -9999 }, "minor": { "stage": 1.6, "flow": -9999 }, "action": { "stage": 1.2, "flow": -9999 } }, "lro": null, "crests": { "historic": [ { "occurredTime": "2025-10-11T12:40:00Z", "stage": 3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-10-10T12:03:00Z", "stage": 2.97, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-09-09T10:23:00Z", "stage": 2.35, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-09-13T13:47:00Z", "stage": 2.29, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-10-09T23:11:00Z", "stage": 2.25, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-09-08T22:04:00Z", "stage": 2.23, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-10-09T10:44:00Z", "stage": 2.16, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-09-09T22:35:00Z", "stage": 2.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": 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"stage": 1.77, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2026-09-08T19:29:00Z", "stage": 1.75, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-10-05T07:58:00Z", "stage": 1.75, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2026-09-25T08:41:00Z", "stage": 1.73, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2026-09-27T09:30:00Z", "stage": 1.73, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-09-30T15:25:00Z", "stage": 1.73, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-10-02T18:11:00Z", "stage": 1.71, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-10-06T08:32:00Z", "stage": 1.7, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2026-05-15T20:15:00Z", "stage": 1.68, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2026-10-06T18:33:00Z", "stage": 1.67, 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"preliminary": "O", "olddatum": false }, { "occurredTime": "2025-08-23T21:36:00Z", "stage": 1.52, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-08-22T20:49:00Z", "stage": 1.5, "flow": 0, "preliminary": "O", "olddatum": false } ], "recent": [ { "occurredTime": "2026-10-09T20:33:00Z", "stage": 1.63, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2026-10-07T19:20:00Z", "stage": 1.83, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2026-10-06T18:33:00Z", "stage": 1.67, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2026-09-28T10:21:00Z", "stage": 1.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2026-09-27T09:30:00Z", "stage": 1.73, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2026-09-26T09:08:00Z", "stage": 1.64, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2026-09-25T08:41:00Z", "stage": 1.73, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2026-09-25T20:53:00Z", "stage": 1.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2026-09-24T20:02:00Z", "stage": 2.03, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2026-09-08T19:29:00Z", "stage": 1.75, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2026-05-15T20:15:00Z", "stage": 1.68, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-10-12T13:40:00Z", "stage": 1.9, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-10-11T12:40:00Z", "stage": 3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-10-10T23:50:00Z", "stage": 2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-10-10T12:03:00Z", "stage": 2.97, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-10-09T23:11:00Z", "stage": 2.25, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-10-09T10:44:00Z", "stage": 2.16, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-10-08T09:56:00Z", "stage": 1.84, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-10-07T09:12:00Z", "stage": 1.83, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-10-06T08:32:00Z", "stage": 1.7, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-10-05T07:58:00Z", "stage": 1.75, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-10-05T19:53:00Z", "stage": 1.63, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-10-04T07:11:00Z", "stage": 1.61, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-10-04T19:25:00Z", "stage": 1.94, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-10-03T18:25:00Z", "stage": 2.03, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-10-02T18:11:00Z", "stage": 1.71, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-09-30T15:25:00Z", "stage": 1.73, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-09-14T14:38:00Z", "stage": 1.53, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-09-13T13:47:00Z", "stage": 2.29, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-09-12T13:18:00Z", "stage": 1.77, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-09-11T11:53:00Z", "stage": 1.64, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-09-10T11:20:00Z", "stage": 2.09, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-09-09T22:35:00Z", "stage": 2.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-09-09T10:23:00Z", "stage": 2.35, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-09-08T22:04:00Z", "stage": 2.23, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-08-23T21:36:00Z", "stage": 1.52, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-08-22T20:49:00Z", "stage": 1.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-08-20T19:34:00Z", "stage": 1.56, "flow": 0, "preliminary": "O", "olddatum": false } ] }, "lowWaters": { "historic": [] }, "impacts": [ { "stage": 7, "statement": "Flooding of historic proportions in St. Augustine and Anastasia Island. Access into St. Augustine is impossible as Ponce De Leon Blvd near SR 16 is flooded at this level. Access into Anastasia Island north of R B Hunt Elementary school is impossible. Most structures in the area experience flooding, some several feet deep. The approach road surface is flooded for the Vilano Beach Causeway, preventing access into the area." }, { "stage": 5, "statement": "Widespread flooding impacts much of St. Augustine and Anastasia Island. Roadways in the historical district are completely impassable as are many areas along the San Sebastian River. Water approaches Ponce De Leon Blvd. Access into Anastasia Island north of Lighthouse Park is impossible, with much of the area flooded, with significant number of structures flooded. In Vilano Beach. flooding becomes considerable south of the causeway, with several roadways impassable along with structure flooding increasing" }, { "stage": 4, "statement": "Considerable flooding impacts much of St. Augustine, either along the waterfront near the marina or from the San Sebastian River. A1A in St. Augustine is impassable as is King Street. Numerous homes not elevated along and east of Riberia Street are flooded. On Anastasia Island, significant structure flooding occurs in South Davis Shores. Numerous residences in North Davis Shores begin to flood. Access into this area is impossible due to widespread road flooding." }, { "stage": 3.7, "statement": "In St. Augustine, considerable flooding occurs. Water overtops the seawall along Avenida Menendez, flooding the road north and south of the Bridge of Lions. Flooding expands south of King Street as water expands out of Maria Sanchez Lake as well as flooding from the San Sebastian River. Access to the King Street Bridge is impossible above this level. On Anastasia Island, travel through much of South Davis Shores is impossible, with numerous homes flooding, particularly along Coquina and Arricola Avenues. " }, { "stage": 3, "statement": "Flooding on Anastasia Island and South Davis Shores worsens with several homes beginning to flood. Several neighborhood roads are impassable. With Anastasia Blvd flooding near the Bridge of Lions, the bridge itself is subject to closure at this level. Flooding expands into North Davis Shores. On the mainland, flooding expands out of Maria Sancehz Lake, reaching King Street. Flooding begins along the waterfront near the Castillo de San Marcos, with the parking lot affected. " }, { "stage": 2.5, "statement": "Road flooding becomes more significant on Anastasia Island, with many roadways in South Davis Shores flooding, with portions of Coquina Avenue becoming impassable. Flooding begins to approach residences in this area. Water also floods onto the outside travel lanes of Anastasia Blvd near the approaches to the Bridge of Lions. In St. Augustine, flooding begins along Riberia Street and further expands out of Maria Sanchez Lake as far north as Bridge Street. Transportation is this area becomes challenging." }, { "stage": 2, "statement": "Flooding begins to expand throughout South Davis Shores, with areas nearer the Matanzas River most affected. Portions of Coquina Avenue and Arricola Avenue begin to flood. In St. Augustine, Lake Maria Sanchez begins to flood onto Cordova Street." }, { "stage": 1.6, "statement": "In St. Augustine on Anastasia Island, several canals and marshlands flood south of A1A. Water begins to flood south of A1A. Water begins to flood some backyards in parts of South Davis Shores." } ] }, "images": { "probability": { "weekint": { "stage": "", "flow": "", "volume": "" }, "entperiod": { "stage": "", "flow": "", "volume": "" }, "shortrange": "" }, "hydrograph": { "default": "https://water.noaa.gov/resources/hydrographs/smff1_hg.png", "floodcat": "https://water.noaa.gov/resources/hydrographs/smff1_record.png" }, "photos": [] }, "dataAttribution": [ { "abbrev": "Hohonu", "text": "Courtesy of Hohonu", "title": "", "url": "https://dashboard.hohonu.io/map-page/hohonu-229/StAugustineMunicipalMarina,FL" } ], "impactsLowWaters": [ { "value": "5 ft", "impact": "Stage needed to inundate designated Gulf Sturgeon critical habitat below Jim Woodruff Lock and Dam." }, { "value": "3 ft", "impact": "Temporary (not sustainable) operating level for of Scholz Power Plant" } ], "normalThreshold": null, "hydronotes": [ { "statement": "Water levels are referenced to the Mean Higher High Water (MHHW) Datum. This datum can be used to approximate sea water inundation of normally dry ground near the coast. For specific impacts, please refer to the statements on this page.", "effective": "0101", "expiration": "1231" } ], "datums": { "vertical": { "value": [ { "label": "Mean Higher High Water", "abbrev": "MHHW*", "description": "The average of the higher high water height of each tidal day observed over the National Tidal Datum Epoch. For stations with shorter series, comparison of simultaneous observations with a control tide station is made in order to derive the equivalent datum of the National Tidal Datum Epoch.", "value": 0 }, { "label": "North American Vertical Datum of 1988", "abbrev": "NAVD88", "description": "A fixed reference for elevations determined by geodetic leveling. The datum was derived from a general adjustment of the first-order terrestrial leveling nets of the United States, Canada, and Mexico. In the adjustment, only the height of the primary tidal bench mark, referenced to the International Great Lakes Datum of 1985 (IGLD 85) local mean sea level height value, at Father Point, Rimouski, Quebec, Canada was held fixed, thus providing minimum constraint. NAVD 88 and IGLD 85 are identical. However, NAVD 88 bench mark values are given in Helmert orthometric height units while IGLD 85 values are in dynamic heights. See International Great Lakes Datum of 1985, National Geodetic Vertical Datum of 1929, and geopotential difference. NAVD 88 should not be used as Mean Sea Level.", "value": 2.08 }, { "label": "Mean Lower Low Water", "abbrev": "MLLW*", "description": "The average of the lower low water height of each tidal day observed over the National Tidal Datum Epoch. For stations with shorter series, comparison of simultaneous observations with a control tide station is made in order to derive the equivalent datum of the National Tidal Datum Epoch.", "value": 4.72 } ] }, "horizontal": { "value": [] }, "notes": { "value": [] } }, "inundation": { "enabled": false, "url": "", "zeroDatum": null, "downloads": null, "siteSpecificInfo": "", "dataAttribution": [] }, "upstreamLid": "", "downstreamLid": "", "inService": { "enabled": true, "message": "" }, "lowThreshold": null, "forecastReliability": "Forecasts are not available. Only observed stages are available for this point.", "TruncateObs": "-1", "TruncateFcst": "-1", "ObservedFloodCategory": "no_flooding", "ForecastFloodCategory": "fcst_not_current" }