{ "lid": "CALK2", "usgsId": "03320000", "reachId": "11617363", "name": "Green River (KY) at Calhoun Lock and Dam", "description": "", "rfc": { "abbreviation": "OHRFC", "name": "Ohio River Forecast Center" }, "wfo": { "abbreviation": "PAH", "name": "West Paducah" }, "state": { "abbreviation": "KY", "name": "Kentucky" }, "county": "McLean", "timeZone": "CST6CDT", "latitude": 37.5338888888889, "longitude": -87.2638888888889, "pedts": { "observed": "HPIRG", "forecast": "HPIFF" }, "status": { "observed": { "primary": 9.81, "primaryUnit": "ft", "secondary": 0.939, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-08-30T21:00:00Z" }, "forecast": { "primary": 9.8, "primaryUnit": "ft", "secondary": 0.92, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-08-31T00:00:00Z" } }, "flood": { "stageUnits": "ft", "flowUnits": "cfs", "categories": { "major": { "stage": 32, "flow": -9999 }, "moderate": { "stage": 26, "flow": -9999 }, "minor": { "stage": 23, "flow": -9999 }, "action": { "stage": 18, "flow": -9999 } }, "lro": { "minorCS": "0.07", "moderateCS": "< 0.05", "majorCS": "< 0.05", "producedTime": "2026-08-29T03:30:05Z", "interval": "SON" }, "crests": { "historic": [ { "occurredTime": "1937-01-27T00:00:00Z", "stage": 43.75, "flow": 208000, "preliminary": "R", "olddatum": false }, { "occurredTime": "1913-01-01T00:00:00Z", "stage": 36.8, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1950-01-16T00:00:00Z", "stage": 36.3, "flow": 86300, "preliminary": "O", "olddatum": false }, { "occurredTime": "2025-04-13T10:45:00Z", "stage": 35.89, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1997-03-11T09:00:00Z", "stage": 34.37, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2011-05-07T16:30:00Z", "stage": 34.01, "flow": 89106, "preliminary": "O", "olddatum": false }, { "occurredTime": "1962-03-10T00:00:00Z", "stage": 33.97, "flow": 106000, "preliminary": "O", 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"olddatum": false }, { "occurredTime": "1955-03-29T00:00:00Z", "stage": 32.2, "flow": 66800, "preliminary": "O", "olddatum": false }, { "occurredTime": "1954-04-21T00:00:00Z", "stage": 20.4, "flow": 36900, "preliminary": "O", "olddatum": false }, { "occurredTime": "1953-05-26T00:00:00Z", "stage": 28.5, "flow": 48000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1952-03-31T00:00:00Z", "stage": 32.5, "flow": 72000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1951-01-21T00:00:00Z", "stage": 32, "flow": 63400, "preliminary": "O", "olddatum": false }, { "occurredTime": "1950-01-16T00:00:00Z", "stage": 36.3, "flow": 86300, "preliminary": "O", "olddatum": false }, { "occurredTime": "1949-02-24T00:00:00Z", "stage": 32.3, "flow": 71300, "preliminary": "O", "olddatum": false }, { "occurredTime": "1948-02-22T00:00:00Z", "stage": 30.3, "flow": 57000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1947-01-08T00:00:00Z", "stage": 24.3, "flow": 41200, "preliminary": "O", "olddatum": false }, { "occurredTime": "1946-02-19T00:00:00Z", "stage": 29.2, "flow": 51700, "preliminary": "O", "olddatum": false }, { "occurredTime": "1945-03-08T00:00:00Z", "stage": 33.6, "flow": 70900, "preliminary": "O", "olddatum": false }, { "occurredTime": "1944-04-17T00:00:00Z", "stage": 25.6, "flow": 40100, "preliminary": "O", "olddatum": false }, { "occurredTime": "1943-03-27T00:00:00Z", "stage": 32.3, "flow": 67600, "preliminary": "O", "olddatum": false }, { "occurredTime": "1942-04-15T00:00:00Z", "stage": 27.3, "flow": 46400, "preliminary": "O", "olddatum": false }, { "occurredTime": "1940-04-25T00:00:00Z", "stage": 29.2, "flow": 49300, "preliminary": "O", "olddatum": false }, { "occurredTime": "1939-02-11T00:00:00Z", "stage": 32.9, "flow": 72900, "preliminary": "O", "olddatum": false }, { "occurredTime": "1938-08-04T00:00:00Z", "stage": 21.92, "flow": 44500, "preliminary": "O", "olddatum": false }, { "occurredTime": "1937-01-27T00:00:00Z", "stage": 43.75, "flow": 208000, "preliminary": "R", "olddatum": false }, { "occurredTime": "1936-04-15T00:00:00Z", "stage": 30.1, "flow": 53000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1935-04-07T00:00:00Z", "stage": 32.9, "flow": 73300, "preliminary": "O", "olddatum": false }, { "occurredTime": "1934-03-10T00:00:00Z", "stage": 27.1, "flow": 51100, "preliminary": "O", "olddatum": false }, { "occurredTime": "1933-01-30T00:00:00Z", "stage": 29.4, "flow": 59100, "preliminary": "O", "olddatum": false }, { "occurredTime": "1932-02-06T00:00:00Z", "stage": 32.2, "flow": 80000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1913-01-01T00:00:00Z", "stage": 36.8, "flow": 0, "preliminary": "O", "olddatum": false } ] }, "lowWaters": { "historic": [] }, "impacts": [ { "stage": 42.4, "statement": "This flood will exceed the highest stage on record. 60 percent of McLean county is inundated." }, { "stage": 34, "statement": "State Road 81 south of Rumsey is flooded and closed." }, { "stage": 33, "statement": "The entire town of Rumsey is flooded." }, { "stage": 32, "statement": "Most of Rumsey is flooded. State Road 81 floods in Rumsey near the Methodist church. Widespread flooding of agricultural land south of Rumsey, even as far south as Cypress Creek." }, { "stage": 30, "statement": "Lower Calhoun begins flooding. A large portion of Rumsey is flooded and evacuation of homes becomes necessary." }, { "stage": 28, "statement": "Riverview Drive in Calhoun floods." }, { "stage": 26, "statement": "Moderate flooding occurs with thousands of acreage flooded in the Island, Rumsey, and Jewel City areas." }, { "stage": 23, "statement": "Minor flooding occurs affecting mainly agricultural bottomland and low lying areas." } ] }, "images": { "probability": { "weekint": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/CALK2.SSTG.prob.weekint.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/CALK2.QINE.prob.weekint.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/CALK2.volume.prob.weekint.gif" }, "entperiod": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/CALK2.SSTG.exceed.90day.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/CALK2.QINE.exceed.90day.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/CALK2.volume.exceed.90day.gif" }, "shortrange": "https://water.noaa.gov/resources/probabilistic/short_term/CALK2.shortrange.hefs.png" }, "hydrograph": { "default": "https://water.noaa.gov/resources/hydrographs/calk2_hg.png", "floodcat": "https://water.noaa.gov/resources/hydrographs/calk2_record.png" }, "photos": [ { "id": "8925659618033471982", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 37.5338888888889, -87.2638888888889 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/calk2/8925659618033471982.jpeg", "caption": "Green River Upstream" } }, { "id": "8937032657073541614", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 37.5338888888889, -87.2638888888889 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/calk2/8937032657073541614.jpeg", "caption": "Gage House and Staff Gage" } }, { "id": "8942842008363274734", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 37.5338888888889, -87.2638888888889 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/calk2/8942842008363274734.jpeg", "caption": "Facing SE toward Rumsey" } }, { "id": "8918970528592499182", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 37.5338888888889, -87.2638888888889 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/calk2/8918970528592499182.jpeg", "caption": "Calhoun Lock and Dam" } }, { "id": "8931432281712562670", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 37.5338888888889, -87.2638888888889 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/calk2/8931432281712562670.jpeg", "caption": "Green River 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": "03320000", "title": "Observations courtesy of U.S. Geological Survey", "url": "https://waterdata.usgs.gov/nwis/inventory/?site_no=03320000" } ], "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": "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": 353.95 } ] }, "horizontal": { "value": [] }, "notes": { "value": [] } }, "inundation": { "enabled": false, "url": "", "zeroDatum": null, "downloads": null, "siteSpecificInfo": "", "dataAttribution": [] }, "upstreamLid": "LVMK2", "downstreamLid": "SPTK2", "inService": { "enabled": true, "message": "" }, "lowThreshold": { "units": "ft", "value": 9.5 }, "forecastReliability": "Forecasts are issued routinely year-round.", "TruncateObs": "-1", "TruncateFcst": "5", "ObservedFloodCategory": "no_flooding", "ForecastFloodCategory": "no_flooding" }