{ "lid": "GALW2", "usgsId": "", "reachId": "3369904", "name": "Ohio River at R C Byrd Lock", "description": "", "rfc": { "abbreviation": "OHRFC", "name": "Ohio River Forecast Center" }, "wfo": { "abbreviation": "RLX", "name": "South Charleston" }, "state": { "abbreviation": "WV", "name": "West Virginia" }, "county": "Mason", "timeZone": "EST5EDT", "latitude": 38.680277777778, "longitude": -82.1875, "pedts": { "observed": "HTIRG", "forecast": "HTIFF" }, "status": { "observed": { "primary": 14.81, "primaryUnit": "ft", "secondary": -999, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-08-30T23:00:00Z" }, "forecast": { "primary": 14.1, "primaryUnit": "ft", "secondary": -999, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-08-31T06:00:00Z" } }, "flood": { "stageUnits": "ft", "flowUnits": "cfs", "categories": { "major": { "stage": 56, "flow": -9999 }, "moderate": { "stage": 52, "flow": -9999 }, "minor": { "stage": 50, "flow": -9999 }, "action": { "stage": 48, "flow": -9999 } }, "lro": { "minorCS": "0.05", "moderateCS": "< 0.05", "majorCS": "< 0.05", "producedTime": "2026-08-29T03:30:05Z", "interval": "SON" }, "crests": { "historic": [ { "occurredTime": "1937-01-27T00:00:00Z", "stage": 69.6, "flow": 0, "preliminary": "R", "olddatum": false }, { "occurredTime": "1913-03-30T00:00:00Z", "stage": 67.9, "flow": 0, "preliminary": "O", "olddatum": true }, { "occurredTime": "1884-02-11T00:00:00Z", "stage": 65.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1948-04-16T00:00:00Z", "stage": 61.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1936-03-23T00:00:00Z", "stage": 60.45, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1943-01-02T00:00:00Z", "stage": 60.4, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1945-03-10T00:00:00Z", "stage": 59.25, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1955-03-08T00:00:00Z", "stage": 57.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1940-04-23T00:00:00Z", "stage": 57.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1933-03-22T00:00:00Z", "stage": 56.4, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1997-03-04T20:00:00Z", "stage": 55, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1939-02-05T00:00:00Z", "stage": 54.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1952-01-30T00:00:00Z", "stage": 53.9, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1950-02-03T00:00:00Z", "stage": 53.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1979-02-27T21:00:00Z", "stage": 52.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1950-12-09T00:00:00Z", "stage": 52.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2018-02-19T09:00:00Z", "stage": 52.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-01-21T21:00:00Z", "stage": 51.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2018-02-20T00:00:00Z", "stage": 51.52, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2011-03-13T01:00:00Z", "stage": 51.31, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2021-03-03T06:30:00Z", "stage": 51.23, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1978-12-11T02:00:00Z", "stage": 51.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2004-09-20T19:00:00Z", "stage": 51.01, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2018-02-20T09:00:00Z", "stage": 50.42, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1991-01-02T08:00:00Z", "stage": 50.4, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2005-01-09T19:00:00Z", "stage": 50.31, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1994-01-30T15:00:00Z", "stage": 50.09, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2015-03-06T21:00:00Z", "stage": 49.11, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2003-02-25T03:00:00Z", "stage": 46.96, "flow": 0, "preliminary": "O", "olddatum": false } ], "recent": [ { "occurredTime": "2021-03-03T06:30:00Z", "stage": 51.23, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2018-02-20T09:00:00Z", "stage": 50.42, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2018-02-20T00:00:00Z", "stage": 51.52, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2018-02-19T09:00:00Z", "stage": 52.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2015-03-06T21:00:00Z", "stage": 49.11, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2011-03-13T01:00:00Z", "stage": 51.31, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2005-01-09T19:00:00Z", "stage": 50.31, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2004-09-20T19:00:00Z", "stage": 51.01, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2003-02-25T03:00:00Z", "stage": 46.96, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1997-03-04T20:00:00Z", "stage": 55, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-01-21T21:00:00Z", "stage": 51.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1994-01-30T15:00:00Z", "stage": 50.09, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1991-01-02T08:00:00Z", "stage": 50.4, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1979-02-27T21:00:00Z", "stage": 52.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1978-12-11T02:00:00Z", "stage": 51.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1955-03-08T00:00:00Z", "stage": 57.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1952-01-30T00:00:00Z", "stage": 53.9, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1950-12-09T00:00:00Z", "stage": 52.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1950-02-03T00:00:00Z", "stage": 53.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1948-04-16T00:00:00Z", "stage": 61.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1945-03-10T00:00:00Z", "stage": 59.25, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1943-01-02T00:00:00Z", "stage": 60.4, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1940-04-23T00:00:00Z", "stage": 57.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1939-02-05T00:00:00Z", "stage": 54.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1937-01-27T00:00:00Z", "stage": 69.6, "flow": 0, "preliminary": "R", "olddatum": false }, { "occurredTime": "1936-03-23T00:00:00Z", "stage": 60.45, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1933-03-22T00:00:00Z", "stage": 56.4, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1913-03-30T00:00:00Z", "stage": 67.9, "flow": 0, "preliminary": "O", "olddatum": true }, { "occurredTime": "1884-02-11T00:00:00Z", "stage": 65.5, "flow": 0, "preliminary": "O", "olddatum": false } ] }, "lowWaters": { "historic": [ { "occurredTime": "1906-01-01T00:00:00Z", "stage": 2.1, "flow": -9999, "statement": "PREVIOUS TO CANALIZATION OF RIVER DETERMINED BY OHIO RIVER SURVEY 1896-1906." }, { "occurredTime": "1999-06-13T00:00:00Z", "stage": 12.37, "flow": -9999, "statement": "" } ] }, "impacts": [ { "stage": 67.9, "statement": "In Gallipolis, all of Front Street, Second, Third and Fourth Avenues are flooded." }, { "stage": 56, "statement": "The City of Gallipolis is surrounded by water." }, { "stage": 52, "statement": "Cultivated lands and low sections along the West Virginia side of the river are flooded." }, { "stage": 50, "statement": "Sections of Route 7 and portions of Gallipolis along the immediate river will flood. Also, bottom lands on the Ohio side of the river are flooded." }, { "stage": 49, "statement": "Sections of Route 7 in Ohio at Teens Run, Chickamauga Creek, Kyger Creek, Clay Chapel, Clay School and just above Route 218 start to flood. Also, sections of Route 2 in West Virginia at Jerry's Run, the old Coast Guard Station and Glenwood start to flood." }, { "stage": 41, "statement": "The Spruce Street Chickamauga Creek bridge is closed due to flooding of low areas around the bridge." } ] }, "images": { "probability": { "weekint": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/GALW2.SSTG.prob.weekint.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/GALW2.QINE.prob.weekint.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/GALW2.volume.prob.weekint.gif" }, "entperiod": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/GALW2.SSTG.exceed.90day.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/GALW2.QINE.exceed.90day.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/GALW2.volume.exceed.90day.gif" }, "shortrange": "https://water.noaa.gov/resources/probabilistic/short_term/GALW2.shortrange.hefs.png" }, "hydrograph": { "default": "https://water.noaa.gov/resources/hydrographs/galw2_hg.png", "floodcat": "https://water.noaa.gov/resources/hydrographs/galw2_record.png" }, "photos": [] }, "dataAttribution": [], "impactsLowWaters": [], "normalThreshold": { "value": 12, "units": "ft" }, "hydronotes": [ { "statement": "River Forecasts typically include ONLY 2 days of future rain from forecast issuance time (lower right of graph). Occasionally 3 days of future rain included.", "effective": "0101", "expiration": "1231" } ], "datums": { "vertical": { "value": [ { "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": 502.117 }, { "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": 503 } ] }, "horizontal": { "value": [] }, "notes": { "value": [] } }, "inundation": { "enabled": false, "url": "", "zeroDatum": null, "downloads": null, "siteSpecificInfo": "", "dataAttribution": [] }, "upstreamLid": "POPW2", "downstreamLid": "HNTW2", "inService": { "enabled": true, "message": "" }, "lowThreshold": null, "forecastReliability": "Forecasts are issued routinely year-round.", "TruncateObs": "-1", "TruncateFcst": "5", "ObservedFloodCategory": "no_flooding", "ForecastFloodCategory": "no_flooding" }