{ "lid": "NJNT1", "usgsId": "03605000", "reachId": "10582239", "name": "Tennessee River at Johnsonville", "description": "", "rfc": { "abbreviation": "LMRFC", "name": "Lower Mississippi River Forecast Center" }, "wfo": { "abbreviation": "MEG", "name": "Memphis" }, "state": { "abbreviation": "TN", "name": "Tennessee" }, "county": "Benton", "timeZone": "CST6CDT", "latitude": 36.017777777778, "longitude": -88.004166666667, "pedts": { "observed": "HGIRZ", "forecast": "HGIFF" }, "status": { "observed": { "primary": 356.12, "primaryUnit": "ft", "secondary": -999, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-08-30T20:00:00Z" }, "forecast": { "primary": 356.46, "primaryUnit": "ft", "secondary": -999, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-08-31T05:00:00Z" } }, "flood": { "stageUnits": "ft", "flowUnits": "cfs", "categories": { "major": { "stage": 370, "flow": -9999 }, "moderate": { "stage": 366, "flow": -9999 }, "minor": { "stage": 361.5, "flow": -9999 }, "action": { "stage": 360, "flow": -9999 } }, "lro": null, "crests": { "historic": [ { "occurredTime": "2011-05-04T05:00:00Z", "stage": 372.64, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2019-03-04T07:00:00Z", "stage": 369.5, "flow": 0, "preliminary": "P", "olddatum": false }, { "occurredTime": "2010-05-08T04:45:00Z", "stage": 369.24, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2013-05-12T01:15:00Z", "stage": 364.96, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2009-05-11T00:00:00Z", "stage": 364.4, "flow": 130, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-04-15T08:30:00Z", "stage": 362.46, "flow": 0, "preliminary": "P", "olddatum": false }, { "occurredTime": "2024-05-13T08:30:00Z", "stage": 361.92, "flow": 0, "preliminary": "P", "olddatum": false }, { "occurredTime": "2014-04-30T16:45:00Z", "stage": 360.53, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2012-07-27T00:00:00Z", "stage": 358.74, "flow": 0, "preliminary": "O", "olddatum": false } ], "recent": [ { "occurredTime": "2025-04-15T08:30:00Z", "stage": 362.46, "flow": 0, "preliminary": "P", "olddatum": false }, { "occurredTime": "2024-05-13T08:30:00Z", "stage": 361.92, "flow": 0, "preliminary": "P", "olddatum": false }, { "occurredTime": "2019-03-04T07:00:00Z", "stage": 369.5, "flow": 0, "preliminary": "P", "olddatum": false }, { "occurredTime": "2014-04-30T16:45:00Z", "stage": 360.53, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2013-05-12T01:15:00Z", "stage": 364.96, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2012-07-27T00:00:00Z", "stage": 358.74, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2011-05-04T05:00:00Z", "stage": 372.64, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2010-05-08T04:45:00Z", "stage": 369.24, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2009-05-11T00:00:00Z", "stage": 364.4, "flow": 130, "preliminary": "O", "olddatum": false } ] }, "lowWaters": { "historic": [] }, "impacts": [ { "stage": 375, "statement": "The Battle of Johnsonville Park in the Johnsonville State Historic Park is completely flooded." }, { "stage": 370, "statement": "Flood waters are impacting many areas along the river, including areas near the Cuba Landing Marina, New Johnsonville Harbor Campground and Marina, Pebble Isle Marina, Eagle Bay Marina, and Cane Creek Marina." }, { "stage": 368, "statement": "Most of the parking and camping areas at Mason's Boat Dock are flooded, and portions of the Battle of Johnsonville Park in the Johnsonville State Historic Park begin to be impacted. Water approaches the Cuba Landing Marina parking lot, and most of the boat launch area is inundated." }, { "stage": 366, "statement": "Many access roads along and near the river are impacted, including portions of Clydeton Road, Lakefront Drive, Paint Rock Road, and Turkey Creek Road in Humphreys County, Lower Standing Rock Road, Short Creek Road, Bobcat Trail, and Tanasi Trail in Stewart County." }, { "stage": 365, "statement": "Water begins to impact areas near the Cuba Landing Marina, New Johnsonville Harbor Campground and Marina, Pebble Isle Marina, Eagle Bay Marina, and Cane Creek Marina. The Tennessee National Wildlife Refuge near the Duck River is completely flooded." }, { "stage": 364, "statement": "Water approaches the top of the levee at the Tennessee River Wildlife Refuge near the Duck River." }, { "stage": 361.5, "statement": "Low-lying portions of Old Johnsonville Road near the Battle of Johnsonville Park begin to flood, and water approaches some of the parking areas and campgrounds at Mason's Boat Dock near Waverly." }, { "stage": 360, "statement": "Low-lying and agricultural areas along the river from the Interstate 40 bridge to Land Between the Lakes, including boat launches, access points, and portions of the Tennessee River National Wildlife Refuge near the Duck River begin to inundate." } ] }, "images": { "probability": { "weekint": { "stage": "", "flow": "", "volume": "" }, "entperiod": { "stage": "", "flow": "", "volume": "" }, "shortrange": "" }, "hydrograph": { "default": "https://water.noaa.gov/resources/hydrographs/njnt1_hg.png", "floodcat": "https://water.noaa.gov/resources/hydrographs/njnt1_record.png" }, "photos": [] }, "dataAttribution": [ { "abbrev": "Tennessee Valley Authority", "text": "TVA", "title": "Tennessee Valley Authority", "url": "https://www.tva.gov/" }, { "abbrev": "USGS", "text": "03605000", "title": "Observations courtesy of U.S. Geological Survey", "url": "https://waterdata.usgs.gov/nwis/inventory/?site_no=03605000" } ], "impactsLowWaters": [], "normalThreshold": { "value": 0, "units": "ft" }, "hydronotes": [ { "statement": "Gauge reading affected by reservoir operations.", "effective": "0101", "expiration": "1231" } ], "datums": { "vertical": { "value": [ { "label": "National Geodetic Vertical Datum of 1929", "abbrev": "NGVD29", "description": "A fixed reference adopted as a standard geodetic datum for elevations determined by leveling. The datum was derived for surveys from a general adjustment of the first-order leveling nets of both the United States and Canada. In the adjustment, mean sea level was held fixed as observed at 21 tide stations in the United States and 5 in Canada. The year indicates the time of the general adjustment. A synonym for Sea-level Datum of 1929. The geodetic datum is fixed and does not take into account the changing stands of sea level. Because there are many variables affecting sea level, and because the geodetic datum represents a best fit over a broad area, the relationship between the geodetic datum and local mean sea level is not consistent from one location to another in either time or space. For this reason, the National Geodetic Vertical Datum should not be confused with mean sea level. See North American Vertical Datum of 1988 (NAVD 88). NGVD 29 should not be used as Mean Sea Level. NGVD 29 is no longer supported by NGS.", "value": 300 } ] }, "horizontal": { "value": [] }, "notes": { "value": [] } }, "inundation": { "enabled": false, "url": "", "zeroDatum": null, "downloads": null, "siteSpecificInfo": "", "dataAttribution": [] }, "upstreamLid": "PRVT1", "downstreamLid": "KYDK2", "inService": { "enabled": true, "message": "" }, "lowThreshold": null, "forecastReliability": "Forecasts are issued routinely year-round.", "TruncateObs": "-1", "TruncateFcst": "6", "ObservedFloodCategory": "no_flooding", "ForecastFloodCategory": "no_flooding" }