{ "lid": "MGYP1", "usgsId": "03108500", "reachId": "3821065", "name": "Ohio River at Montgomery Lock and Dam", "description": "", "rfc": { "abbreviation": "OHRFC", "name": "Ohio River Forecast Center" }, "wfo": { "abbreviation": "PBZ", "name": "Moon Township" }, "state": { "abbreviation": "PA", "name": "Pennsylvania" }, "county": "Beaver", "timeZone": "EST5EDT", "latitude": 40.647222222222, "longitude": -80.388888888889, "pedts": { "observed": "HTIRA", "forecast": "HTIFF" }, "status": { "observed": { "primary": 12.87, "primaryUnit": "ft", "secondary": -999, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-08-31T03:45:00Z" }, "forecast": { "primary": 12.7, "primaryUnit": "ft", "secondary": -999, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-08-31T06:00:00Z" } }, "flood": { "stageUnits": "ft", "flowUnits": "cfs", "categories": { "major": { "stage": 38, "flow": -9999 }, "moderate": { "stage": 36, "flow": -9999 }, "minor": { "stage": 33, "flow": -9999 }, "action": { "stage": 23.3, "flow": -9999 } }, "lro": { "minorCS": "0.06", "moderateCS": "< 0.05", "majorCS": "< 0.05", "producedTime": "2026-08-29T03:30:05Z", "interval": "SON" }, "crests": { "historic": [ { "occurredTime": "1936-03-18T00:00:00Z", "stage": 55, "flow": 0, "preliminary": "R", "olddatum": false }, { "occurredTime": "1942-12-31T00:00:00Z", "stage": 47.9, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1972-06-24T00:00:00Z", "stage": 43.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-01-19T00:00:00Z", "stage": 43, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1954-10-17T00:00:00Z", "stage": 43, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1966-03-11T00:00:00Z", "stage": 42, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1964-03-11T00:00:00Z", "stage": 42, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1959-01-23T00:00:00Z", "stage": 41.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2004-09-19T02:00:00Z", "stage": 41, "flow": 360000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1952-01-28T00:00:00Z", "stage": 40.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1950-12-05T00:00:00Z", "stage": 37.7, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2018-09-11T09:45:00Z", "stage": 37.49, "flow": 274895, "preliminary": "O", "olddatum": false }, { "occurredTime": "2005-01-07T02:00:00Z", "stage": 36.9, "flow": 300000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1960-04-01T00:00:00Z", "stage": 36.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2024-04-04T17:00:00Z", "stage": 36, "flow": 286993, "preliminary": "P", "olddatum": false }, { "occurredTime": "2024-04-04T14:15:00Z", "stage": 35.97, "flow": 286572, "preliminary": "O", "olddatum": false }, { "occurredTime": "1966-02-14T00:00:00Z", "stage": 35.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1964-03-31T00:00:00Z", "stage": 34.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1963-03-06T00:00:00Z", "stage": 34.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2018-09-11T04:45:00Z", "stage": 33.85, "flow": 257824, "preliminary": "O", "olddatum": false }, { "occurredTime": "2018-02-17T15:15:00Z", "stage": 33.57, "flow": 254138, "preliminary": "O", "olddatum": false }, { "occurredTime": "1963-03-21T00:00:00Z", "stage": 33.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1983-05-05T00:00:00Z", "stage": 32.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1979-02-26T00:00:00Z", "stage": 31.9, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1985-11-06T00:00:00Z", "stage": 31.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1990-12-19T00:00:00Z", "stage": 31.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1991-01-01T00:00:00Z", "stage": 31.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1970-04-03T00:00:00Z", "stage": 31.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1979-03-06T00:00:00Z", "stage": 30.9, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1967-03-07T00:00:00Z", "stage": 30.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1986-02-02T00:00:00Z", "stage": 30, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-07-20T00:00:00Z", "stage": 29.9, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1975-02-25T00:00:00Z", "stage": 29.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1976-02-18T00:00:00Z", "stage": 29.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1985-11-29T00:00:00Z", "stage": 28.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2007-03-16T11:00:00Z", "stage": 28.3, "flow": 195086, "preliminary": "O", "olddatum": false }, { "occurredTime": "1984-02-15T00:00:00Z", "stage": 27.9, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2004-09-10T11:00:00Z", "stage": 27.8, "flow": 19100, "preliminary": "O", "olddatum": false }, { "occurredTime": "1979-01-02T00:00:00Z", "stage": 27.8, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1985-11-17T00:00:00Z", "stage": 27.8, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-05-13T00:00:00Z", "stage": 27.8, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1978-01-27T00:00:00Z", "stage": 27.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1978-03-15T00:00:00Z", "stage": 26.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1977-04-03T00:00:00Z", "stage": 26.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1978-05-18T00:00:00Z", "stage": 26.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1985-03-13T00:00:00Z", "stage": 25.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-05-18T00:00:00Z", "stage": 24.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1982-02-01T00:00:00Z", "stage": 24.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1982-03-18T00:00:00Z", "stage": 24.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2007-03-24T09:00:00Z", "stage": 24.2, "flow": 156025, "preliminary": "O", "olddatum": false }, { "occurredTime": "1980-04-10T00:00:00Z", "stage": 24.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1986-03-16T00:00:00Z", "stage": 23.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1986-02-20T00:00:00Z", "stage": 22.8, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1987-04-08T00:00:00Z", "stage": 22.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1980-08-19T00:00:00Z", "stage": 22.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1986-01-02T00:00:00Z", "stage": 22, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1986-11-27T00:00:00Z", "stage": 21.1, "flow": 0, "preliminary": "O", "olddatum": false } ], "recent": [ { "occurredTime": "2024-04-04T14:15:00Z", "stage": 35.97, "flow": 286572, "preliminary": "O", "olddatum": false }, { "occurredTime": "2024-04-04T17:00:00Z", "stage": 36, "flow": 286993, "preliminary": "P", "olddatum": false }, { "occurredTime": "2018-09-11T04:45:00Z", "stage": 33.85, "flow": 257824, "preliminary": "O", "olddatum": false }, { "occurredTime": "2018-09-11T09:45:00Z", "stage": 37.49, "flow": 274895, "preliminary": "O", "olddatum": false }, { "occurredTime": "2018-02-17T15:15:00Z", "stage": 33.57, "flow": 254138, "preliminary": "O", "olddatum": false }, { "occurredTime": "2007-03-24T09:00:00Z", "stage": 24.2, "flow": 156025, "preliminary": "O", "olddatum": false }, { "occurredTime": "2007-03-16T11:00:00Z", "stage": 28.3, "flow": 195086, "preliminary": "O", "olddatum": false }, { "occurredTime": "2005-01-07T02:00:00Z", "stage": 36.9, "flow": 300000, "preliminary": "O", "olddatum": false }, { "occurredTime": "2004-09-19T02:00:00Z", "stage": 41, "flow": 360000, "preliminary": "O", "olddatum": false }, { "occurredTime": "2004-09-10T11:00:00Z", "stage": 27.8, "flow": 19100, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-07-20T00:00:00Z", "stage": 29.9, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-05-18T00:00:00Z", "stage": 24.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-05-13T00:00:00Z", "stage": 27.8, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-01-19T00:00:00Z", "stage": 43, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1991-01-01T00:00:00Z", "stage": 31.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1990-12-19T00:00:00Z", "stage": 31.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1987-04-08T00:00:00Z", "stage": 22.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1986-11-27T00:00:00Z", "stage": 21.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1986-03-16T00:00:00Z", "stage": 23.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1986-02-20T00:00:00Z", "stage": 22.8, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1986-02-02T00:00:00Z", "stage": 30, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1986-01-02T00:00:00Z", "stage": 22, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1985-11-29T00:00:00Z", "stage": 28.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1985-11-17T00:00:00Z", "stage": 27.8, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1985-11-06T00:00:00Z", "stage": 31.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1985-03-13T00:00:00Z", "stage": 25.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1984-02-15T00:00:00Z", "stage": 27.9, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1983-05-05T00:00:00Z", "stage": 32.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1982-03-18T00:00:00Z", "stage": 24.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1982-02-01T00:00:00Z", "stage": 24.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1980-08-19T00:00:00Z", "stage": 22.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1980-04-10T00:00:00Z", "stage": 24.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1979-03-06T00:00:00Z", "stage": 30.9, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1979-02-26T00:00:00Z", "stage": 31.9, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1979-01-02T00:00:00Z", "stage": 27.8, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1978-05-18T00:00:00Z", "stage": 26.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1978-03-15T00:00:00Z", "stage": 26.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1978-01-27T00:00:00Z", "stage": 27.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1977-04-03T00:00:00Z", "stage": 26.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1976-02-18T00:00:00Z", "stage": 29.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1975-02-25T00:00:00Z", "stage": 29.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1972-06-24T00:00:00Z", "stage": 43.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1970-04-03T00:00:00Z", "stage": 31.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1967-03-07T00:00:00Z", "stage": 30.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1966-03-11T00:00:00Z", "stage": 42, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1966-02-14T00:00:00Z", "stage": 35.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1964-03-31T00:00:00Z", "stage": 34.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1964-03-11T00:00:00Z", "stage": 42, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1963-03-21T00:00:00Z", "stage": 33.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1963-03-06T00:00:00Z", "stage": 34.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1960-04-01T00:00:00Z", "stage": 36.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1959-01-23T00:00:00Z", "stage": 41.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1954-10-17T00:00:00Z", "stage": 43, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1952-01-28T00:00:00Z", "stage": 40.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1950-12-05T00:00:00Z", "stage": 37.7, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1942-12-31T00:00:00Z", "stage": 47.9, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1936-03-18T00:00:00Z", "stage": 55, "flow": 0, "preliminary": "R", "olddatum": false } ] }, "lowWaters": { "historic": [] }, "impacts": [ { "stage": 55, "statement": "This was the st. Patricks day flood of 1936. This crest occurred before flood control projects were in place at numerous locations upstream." }, { "stage": 40.5, "statement": "Lock walls overtopped." }, { "stage": 37, "statement": "Navigation suspended, lock out of service." } ] }, "images": { "probability": { "weekint": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/MGYP1.SSTG.prob.weekint.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/MGYP1.QINE.prob.weekint.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/MGYP1.volume.prob.weekint.gif" }, "entperiod": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/MGYP1.SSTG.exceed.90day.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/MGYP1.QINE.exceed.90day.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/MGYP1.volume.exceed.90day.gif" }, "shortrange": "https://water.noaa.gov/resources/probabilistic/short_term/MGYP1.shortrange.hefs.png" }, "hydrograph": { "default": "https://water.noaa.gov/resources/hydrographs/mgyp1_hg.png", "floodcat": "https://water.noaa.gov/resources/hydrographs/mgyp1_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": "03108500", "title": "Observations courtesy of U.S. Geological Survey", "url": "https://waterdata.usgs.gov/nwis/inventory/?site_no=03108500" }, { "abbrev": "COE", "text": "Website", "title": "Observations courtesy of U.S. Army Corps of Engineers", "url": "https://www.lrp.usace.army.mil/Missions/Navigation/Locks-and-Dams/Montgomery-Locks-Dam/" } ], "impactsLowWaters": [], "normalThreshold": { "value": 12, "units": "ft" }, "hydronotes": [ { "statement": "The above river forecast includes future rainfall/snowmelt. Forecast stages may be different if the actual rainfall/snowmelt is different than the forecast rainfall/snowmelt.", "effective": "0101", "expiration": "1231" }, { "statement": "Stage may be affected by ice.", "effective": "0101", "expiration": "0331" } ], "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": 652.16 } ] }, "horizontal": { "value": [] }, "notes": { "value": [] } }, "inundation": { "enabled": false, "url": "", "zeroDatum": null, "downloads": null, "siteSpecificInfo": "", "dataAttribution": [] }, "upstreamLid": "DSHP1", "downstreamLid": "WLVO1", "inService": { "enabled": true, "message": "" }, "lowThreshold": null, "forecastReliability": "Forecasts are issued routinely year-round.", "TruncateObs": "-1", "TruncateFcst": "-1", "ObservedFloodCategory": "no_flooding", "ForecastFloodCategory": "no_flooding" }