{ "lid": "SMLI2", "usgsId": "03399800", "reachId": "11870220", "name": "Ohio River at Smithland Lock and Dam", "description": "", "rfc": { "abbreviation": "LMRFC", "name": "Lower Mississippi River Forecast Center" }, "wfo": { "abbreviation": "PAH", "name": "West Paducah" }, "state": { "abbreviation": "IL", "name": "Illinois" }, "county": "Pope", "timeZone": "CST6CDT", "latitude": 37.158333333333, "longitude": -88.426111111111, "pedts": { "observed": "HTIRG", "forecast": "HTIFF" }, "status": { "observed": { "primary": 13.73, "primaryUnit": "ft", "secondary": 87.2, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-08-30T23:00:00Z" }, "forecast": { "primary": 13.9, "primaryUnit": "ft", "secondary": 90.2, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-08-31T06:00:00Z" } }, "flood": { "stageUnits": "ft", "flowUnits": "cfs", "categories": { "major": { "stage": 50, "flow": -9999 }, "moderate": { "stage": 48, "flow": -9999 }, "minor": { "stage": 40, "flow": -9999 }, "action": { "stage": 35, "flow": -9999 } }, "lro": { "minorCS": "< 0.05", "moderateCS": "< 0.05", "majorCS": "< 0.05", "producedTime": "2026-08-29T20:45:17Z", "interval": "SON" }, "crests": { "historic": [ { "occurredTime": "2011-05-06T13:45:00Z", "stage": 54.83, "flow": 1064820, "preliminary": "R", "olddatum": false }, { "occurredTime": "2019-02-25T17:15:00Z", "stage": 51.83, "flow": 870234, "preliminary": "O", "olddatum": false }, { "occurredTime": "1997-03-12T12:00:00Z", "stage": 51.44, "flow": 832000, "preliminary": "O", "olddatum": false }, { "occurredTime": "2018-03-02T17:45:00Z", "stage": 50.14, "flow": 777357, "preliminary": "O", "olddatum": false }, { "occurredTime": "1991-01-08T07:00:00Z", "stage": 49.8, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-04-15T19:45:00Z", "stage": 47.96, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2005-01-16T17:30:00Z", "stage": 47.29, "flow": 805590, "preliminary": "O", "olddatum": false }, { "occurredTime": "1984-05-14T00:00:00Z", "stage": 47.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2020-02-20T17:30:00Z", "stage": 46.59, "flow": 657403, "preliminary": "O", "olddatum": false }, { "occurredTime": "1983-05-25T00:00:00Z", "stage": 46.4, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1989-02-24T00:00:00Z", "stage": 46.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1990-02-19T00:00:00Z", "stage": 45.8, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1994-04-23T06:00:00Z", "stage": 45.29, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2015-03-17T13:15:00Z", "stage": 45.22, "flow": 620277, "preliminary": "O", "olddatum": false }, { "occurredTime": "2008-03-28T09:00:00Z", "stage": 45.17, "flow": 619023, "preliminary": "O", "olddatum": false }, { "occurredTime": "2022-03-02T21:15:00Z", "stage": 44.04, "flow": 590980, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-05-13T00:00:00Z", "stage": 44, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1995-05-28T00:00:00Z", "stage": 44, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2003-02-28T01:00:00Z", "stage": 43.9, "flow": 704041, "preliminary": "O", "olddatum": false }, { "occurredTime": "1999-02-01T06:00:00Z", "stage": 43.7, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2002-05-24T15:00:00Z", "stage": 43, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2010-05-06T14:30:00Z", "stage": 42.9, "flow": 567881, "preliminary": "O", "olddatum": false }, { "occurredTime": "2021-03-10T13:45:00Z", "stage": 42.37, "flow": 557327, "preliminary": "O", "olddatum": false }, { "occurredTime": "1994-02-06T10:00:00Z", "stage": 41.4, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1998-04-28T02:01:00Z", "stage": 41.4, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2009-05-12T20:30:00Z", "stage": 41.33, "flow": 538552, "preliminary": "O", "olddatum": false }, { "occurredTime": "1994-03-18T10:00:00Z", "stage": 41.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1982-03-25T00:00:00Z", "stage": 40.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1993-04-03T10:00:00Z", "stage": 40.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1985-03-06T00:00:00Z", "stage": 40.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2004-12-10T22:00:00Z", "stage": 40.1, "flow": 594792, "preliminary": "O", "olddatum": false } ], "recent": [ { "occurredTime": "2025-04-15T19:45:00Z", "stage": 47.96, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2022-03-02T21:15:00Z", "stage": 44.04, "flow": 590980, "preliminary": "O", "olddatum": false }, { "occurredTime": "2021-03-10T13:45:00Z", "stage": 42.37, "flow": 557327, "preliminary": "O", "olddatum": false }, { "occurredTime": "2020-02-20T17:30:00Z", "stage": 46.59, "flow": 657403, "preliminary": "O", "olddatum": false }, { "occurredTime": "2019-02-25T17:15:00Z", "stage": 51.83, "flow": 870234, "preliminary": "O", "olddatum": false }, { "occurredTime": "2018-03-02T17:45:00Z", "stage": 50.14, "flow": 777357, "preliminary": "O", "olddatum": false }, { "occurredTime": "2015-03-17T13:15:00Z", "stage": 45.22, "flow": 620277, "preliminary": "O", "olddatum": false }, { "occurredTime": "2011-05-06T13:45:00Z", "stage": 54.83, "flow": 1064820, "preliminary": "R", "olddatum": false }, { "occurredTime": "2010-05-06T14:30:00Z", "stage": 42.9, "flow": 567881, "preliminary": "O", "olddatum": false }, { "occurredTime": "2009-05-12T20:30:00Z", "stage": 41.33, "flow": 538552, "preliminary": "O", "olddatum": false }, { "occurredTime": "2008-03-28T09:00:00Z", "stage": 45.17, "flow": 619023, "preliminary": "O", "olddatum": false }, { "occurredTime": "2005-01-16T17:30:00Z", "stage": 47.29, "flow": 805590, "preliminary": "O", "olddatum": false }, { "occurredTime": "2004-12-10T22:00:00Z", "stage": 40.1, "flow": 594792, "preliminary": "O", "olddatum": false }, { "occurredTime": "2003-02-28T01:00:00Z", "stage": 43.9, "flow": 704041, "preliminary": "O", "olddatum": false }, { "occurredTime": "2002-05-24T15:00:00Z", "stage": 43, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1999-02-01T06:00:00Z", "stage": 43.7, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1998-04-28T02:01:00Z", "stage": 41.4, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1997-03-12T12:00:00Z", "stage": 51.44, "flow": 832000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-05-13T00:00:00Z", "stage": 44, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1995-05-28T00:00:00Z", "stage": 44, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1994-04-23T06:00:00Z", "stage": 45.29, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1994-03-18T10:00:00Z", "stage": 41.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1994-02-06T10:00:00Z", "stage": 41.4, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1993-04-03T10:00:00Z", "stage": 40.3, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1991-01-08T07:00:00Z", "stage": 49.8, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1990-02-19T00:00:00Z", "stage": 45.8, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1989-02-24T00:00:00Z", "stage": 46.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1985-03-06T00:00:00Z", "stage": 40.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1984-05-14T00:00:00Z", "stage": 47.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1983-05-25T00:00:00Z", "stage": 46.4, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1982-03-25T00:00:00Z", "stage": 40.6, "flow": 0, "preliminary": "O", "olddatum": false } ] }, "lowWaters": { "historic": [] }, "impacts": [ { "stage": 51, "statement": "Large amounts of property damage can be expected. Evacuation of many homes and businesses becomes necessary. Highway 60 in Smithland closes." }, { "stage": 40, "statement": "Minor flooding occurs affecting mainly bottomland and surrounding and low lying areas." } ] }, "images": { "probability": { "weekint": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/SMLI2.SSTG.prob.weekint.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/SMLI2.QINE.prob.weekint.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/SMLI2.volume.prob.weekint.gif" }, "entperiod": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/SMLI2.SSTG.exceed.90day.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/SMLI2.QINE.exceed.90day.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/SMLI2.volume.exceed.90day.gif" }, "shortrange": "https://water.noaa.gov/resources/probabilistic/short_term/SMLI2.shortrange.hefs.png" }, "hydrograph": { "default": "https://water.noaa.gov/resources/hydrographs/smli2_hg.png", "floodcat": "https://water.noaa.gov/resources/hydrographs/smli2_record.png" }, "photos": [ { "id": "3300804283497124334", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 37.158333333333, -88.426111111111 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/smli2/3300804283497124334.jpeg", "caption": "Smithland Lock and Dam" } }, { "id": "3309435003098567150", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 37.158333333333, -88.426111111111 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/smli2/3309435003098567150.jpeg", "caption": "Ohio River Looking Upstream" } }, { "id": "3318103385268228590", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 37.158333333333, -88.426111111111 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/smli2/3318103385268228590.jpeg", "caption": "Ohio River Looking Downstream" } } ] }, "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": "03399800", "title": "Observations courtesy of U.S. Geological Survey", "url": "https://waterdata.usgs.gov/nwis/inventory/?site_no=03399800" } ], "impactsLowWaters": [], "normalThreshold": null, "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": [ { "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": 289.1 }, { "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": 289.29 } ] }, "horizontal": { "value": [] }, "notes": { "value": [] } }, "inundation": { "enabled": false, "url": "", "zeroDatum": null, "downloads": null, "siteSpecificInfo": "", "dataAttribution": [] }, "upstreamLid": "GOLI2", "downstreamLid": "PAHK2", "inService": { "enabled": true, "message": "" }, "lowThreshold": null, "forecastReliability": "Forecasts are issued routinely year-round.", "TruncateObs": "-1", "TruncateFcst": "14", "ObservedFloodCategory": "no_flooding", "ForecastFloodCategory": "no_flooding" }