{ "lid": "GNSA1", "usgsId": "02447026", "reachId": "18634030", "name": "Tombigbee River at Gainesville Lock and Dam", "description": "", "rfc": { "abbreviation": "SERFC", "name": "Southeast River Forecast Center" }, "wfo": { "abbreviation": "BMX", "name": "Calera" }, "state": { "abbreviation": "AL", "name": "Alabama" }, "county": "Greene", "timeZone": "CST6CDT", "latitude": 32.852222222222, "longitude": -88.154166666667, "pedts": { "observed": "HTIRZ", "forecast": "HTIFF" }, "status": { "observed": { "primary": 73.87, "primaryUnit": "ft", "secondary": 2.01, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-08-30T19:45:00Z" }, "forecast": { "primary": 73.9, "primaryUnit": "ft", "secondary": 2.09, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-08-31T00:00:00Z" } }, "flood": { "stageUnits": "ft", "flowUnits": "cfs", "categories": { "major": { "stage": 118, "flow": -9999 }, "moderate": { "stage": 110, "flow": -9999 }, "minor": { "stage": 101, "flow": -9999 }, "action": { "stage": 101, "flow": -9999 } }, "lro": { "minorCS": "0.084", "moderateCS": "< 0.05", "majorCS": "< 0.05", "producedTime": "2025-09-09T13:58:13Z", "interval": "SON" }, "crests": { "historic": [ { "occurredTime": "1979-04-15T00:00:00Z", "stage": 120.74, "flow": 0, "preliminary": "R", "olddatum": false }, { "occurredTime": "1991-02-25T00:00:00Z", "stage": 118.35, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2020-02-16T22:15:00Z", "stage": 116.58, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1991-06-01T00:00:00Z", "stage": 116.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2019-02-28T16:00:00Z", "stage": 115.46, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1991-05-04T00:00:00Z", "stage": 114.88, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1990-12-28T00:00:00Z", "stage": 114.82, "flow": 0, "preliminary": "O", 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"stage": 109.43, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2010-12-10T00:00:00Z", "stage": 109.29, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2009-03-01T00:00:00Z", "stage": 109.46, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2009-01-10T18:00:00Z", "stage": 107.73, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2008-12-14T05:00:00Z", "stage": 105.63, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2008-03-04T00:00:00Z", "stage": 109.44, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2005-12-11T00:00:00Z", "stage": 113.56, "flow": 114000, "preliminary": "O", "olddatum": false }, { "occurredTime": "2004-12-14T03:00:00Z", "stage": 112.01, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2004-02-12T08:00:00Z", "stage": 108.83, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2004-02-09T00:00:00Z", "stage": 112.95, "flow": 97900, "preliminary": "O", "olddatum": false }, { "occurredTime": "2003-04-09T05:00:00Z", "stage": 104.55, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2003-02-25T02:00:00Z", "stage": 110.04, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2003-02-24T00:00:00Z", "stage": 111.55, "flow": 133000, "preliminary": "O", "olddatum": false }, { "occurredTime": "2002-01-29T06:00:00Z", "stage": 109.05, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2001-12-17T20:00:00Z", "stage": 106.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2001-01-22T13:00:00Z", "stage": 102.08, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2000-04-10T00:00:00Z", "stage": 103.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1999-02-02T02:00:00Z", "stage": 109.92, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1999-01-27T20:00:00Z", "stage": 106.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1998-03-10T00:00:00Z", "stage": 102.86, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1998-01-09T00:00:00Z", "stage": 110.75, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1997-03-07T00:00:00Z", "stage": 104.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-01-28T12:00:00Z", "stage": 104.62, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1995-04-26T00:00:00Z", "stage": 109.92, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1995-03-11T22:00:00Z", "stage": 110.31, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1995-02-18T00:00:00Z", "stage": 99.61, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1994-03-31T00:00:00Z", "stage": 107.62, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1994-02-15T00:00:00Z", "stage": 109.79, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1991-12-07T00:00:00Z", "stage": 107.62, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1991-06-01T00:00:00Z", "stage": 116.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1991-05-17T00:00:00Z", "stage": 112.8, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1991-05-04T00:00:00Z", "stage": 114.88, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1991-02-25T00:00:00Z", "stage": 118.35, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1990-12-28T00:00:00Z", "stage": 114.82, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1989-03-07T00:00:00Z", "stage": 105.62, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1989-01-17T00:00:00Z", "stage": 110.94, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1987-03-03T00:00:00Z", "stage": 109.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1987-01-20T00:00:00Z", "stage": 103.01, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1979-04-15T00:00:00Z", "stage": 120.74, "flow": 0, "preliminary": "R", "olddatum": false } ] }, "lowWaters": { "historic": [] }, "impacts": [ { "stage": 117.5, "statement": "Flooding of some secondary homes upstream in the Panola and Warsaw areas occurs. " }, { "stage": 109, "statement": "Flooding of some camps and cabins...as well as widespread flooding of low-lying woods and agricultural lands...occurs, especially upstream of the lock and dam. " }, { "stage": 101, "statement": "Flooding of low lying agricultural and wooded lands in the area occurs. " } ] }, "images": { "probability": { "weekint": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/GNSA1.SSTG.prob.weekint.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/GNSA1.QINE.prob.weekint.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/GNSA1.volume.prob.weekint.gif" }, "entperiod": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/GNSA1.SSTG.exceed.90day.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/GNSA1.QINE.exceed.90day.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/GNSA1.volume.exceed.90day.gif" }, "shortrange": "https://water.noaa.gov/resources/probabilistic/short_term/GNSA1.shortrange.hefs.png" }, "hydrograph": { "default": "https://water.noaa.gov/resources/hydrographs/gnsa1_hg.png", "floodcat": "https://water.noaa.gov/resources/hydrographs/gnsa1_record.png" }, "photos": [] }, "dataAttribution": [ { "abbrev": "US Geological Survey", "text": "USGS--Water Resources of the United States", "title": "US Geological Survey", "url": "https://waterdata.usgs.gov/nwis" }, { "abbrev": "USGS", "text": "02447026", "title": "Observations courtesy of U.S. Geological Survey", "url": "https://waterdata.usgs.gov/nwis/inventory/?site_no=02447026" }, { "abbrev": "COE", "text": "Website", "title": "Observations courtesy of U.S. Army Corps of Engineers", "url": "https://water.sam.usace.army.mil/" } ], "impactsLowWaters": [], "normalThreshold": { "value": 0, "units": "ft" }, "hydronotes": [ { "statement": "River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 48 hours into the future from the forecast issuance time.", "effective": "0101", "expiration": "1231" } ], "datums": { "vertical": { "value": [] }, "horizontal": { "value": [] }, "notes": { "value": [] } }, "inundation": { "enabled": false, "url": "", "zeroDatum": null, "downloads": null, "siteSpecificInfo": "", "dataAttribution": [] }, "upstreamLid": "AVLA1", "downstreamLid": "DLDA1", "inService": { "enabled": true, "message": "" }, "lowThreshold": null, "forecastReliability": "Forecasts are issued routinely year-round.", "TruncateObs": "-1", "TruncateFcst": "7", "ObservedFloodCategory": "no_flooding", "ForecastFloodCategory": "no_flooding" }