{ "lid": "GGYM7", "usgsId": "", "reachId": "5803288", "name": "Mississippi River at Gregory Landing", "description": "", "rfc": { "abbreviation": "NCRFC", "name": "North Central River Forecast Center" }, "wfo": { "abbreviation": "DVN", "name": "Davenport" }, "state": { "abbreviation": "MO", "name": "Missouri" }, "county": "Clark", "timeZone": "CST6CDT", "latitude": 40.27926944, "longitude": -91.49593611, "pedts": { "observed": "HGIRG", "forecast": "HGIFE" }, "status": { "observed": { "primary": 8.36, "primaryUnit": "ft", "secondary": 99, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-08-30T21:00:00Z" }, "forecast": { "primary": 8.6, "primaryUnit": "ft", "secondary": 102, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-08-31T06:00:00Z" } }, "flood": { "stageUnits": "ft", "flowUnits": "cfs", "categories": { "major": { "stage": 25, "flow": -9999 }, "moderate": { "stage": 18, "flow": -9999 }, "minor": { "stage": 15, "flow": -9999 }, "action": { "stage": 14, "flow": -9999 } }, "lro": { "minorCS": "0.12", "moderateCS": "0.06", "majorCS": "< 0.05", "producedTime": "2026-08-28T20:02:41Z", "interval": "SON" }, "crests": { "historic": [ { "occurredTime": "1993-07-09T00:00:00Z", "stage": 28.49, "flow": 0, "preliminary": "R", "olddatum": false }, { "occurredTime": "2008-06-18T00:00:00Z", "stage": 27.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2019-06-02T17:10:00Z", "stage": 26.97, "flow": 498538, "preliminary": "O", "olddatum": false }, { "occurredTime": "2019-05-03T00:00:00Z", "stage": 25.16, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1973-04-24T00:00:00Z", "stage": 24.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2014-07-07T10:20:00Z", "stage": 24.42, "flow": 394627, "preliminary": "O", "olddatum": false }, { "occurredTime": "2001-05-15T00:00:00Z", "stage": 24.04, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": 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20.41, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1997-04-17T00:00:00Z", "stage": 18.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-05-28T00:00:00Z", "stage": 20.43, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1995-05-14T00:00:00Z", "stage": 18, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1993-07-09T00:00:00Z", "stage": 28.49, "flow": 0, "preliminary": "R", "olddatum": false }, { "occurredTime": "1986-10-04T00:00:00Z", "stage": 21.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1986-05-22T00:00:00Z", "stage": 18.4, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1985-03-05T00:00:00Z", "stage": 18.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1984-06-29T00:00:00Z", "stage": 17.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1983-04-04T00:00:00Z", "stage": 19.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1982-12-03T00:00:00Z", "stage": 15.8, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1982-04-18T00:00:00Z", "stage": 18.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1973-04-24T00:00:00Z", "stage": 24.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1965-05-01T00:00:00Z", "stage": 22.7, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1960-04-03T00:00:00Z", "stage": 21.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1951-05-12T00:00:00Z", "stage": 20.7, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1947-06-09T00:00:00Z", "stage": 21, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1944-05-28T00:00:00Z", "stage": 21.1, "flow": 0, "preliminary": "O", "olddatum": false } ] }, "lowWaters": { "historic": [] }, "impacts": [ { "stage": 29, "statement": "Water reaches the floor of the grain elevator office building in Gregory Landing." }, { "stage": 25.4, "statement": "Hunt and Lima Lake levees are overtopped, affecting U.S. Highway 61." }, { "stage": 17, "statement": "Water affects the road north of the grain elevator in Gregory Landing." }, { "stage": 16, "statement": "Water affects buildings in unprotected low areas." } ] }, "images": { "probability": { "weekint": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/GGYM7.SSTG.prob.weekint.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/GGYM7.QINE.prob.weekint.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/GGYM7.volume.prob.weekint.gif" }, "entperiod": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/GGYM7.SSTG.exceed.90day.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/GGYM7.QINE.exceed.90day.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/GGYM7.volume.exceed.90day.gif" }, "shortrange": "https://water.noaa.gov/resources/probabilistic/short_term/GGYM7.shortrange.hefs.png" }, "hydrograph": { "default": "https://water.noaa.gov/resources/hydrographs/ggym7_hg.png", "floodcat": "https://water.noaa.gov/resources/hydrographs/ggym7_record.png" }, "photos": [] }, "dataAttribution": [ { "abbrev": "U.S. Army Corps of Engineers", "text": "U.S. Army Corps of Engineers", "title": "U.S. Army Corps of Engineers", "url": "https://www.mvr.usace.army.mil/" }, { "abbrev": "COE", "text": "Website", "title": "Observations courtesy of U.S. Army Corps of Engineers", "url": "https://www.rivergages.com/" } ], "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": "1001", "expiration": "0401" } ], "datums": { "vertical": { "value": [] }, "horizontal": { "value": [] }, "notes": { "value": [] } }, "inundation": { "enabled": false, "url": "", "zeroDatum": null, "downloads": null, "siteSpecificInfo": "", "dataAttribution": [] }, "upstreamLid": "EOKI4", "downstreamLid": "CANM7", "inService": { "enabled": true, "message": "" }, "lowThreshold": null, "forecastReliability": "Forecasts are issued routinely year-round.", "TruncateObs": "-1", "TruncateFcst": "7", "ObservedFloodCategory": "no_flooding", "ForecastFloodCategory": "no_flooding" }