{ "lid": "LYNW3", "usgsId": "", "reachId": "13211694", "name": "Mississippi River below Lock and Dam 9 - Lynxville", "description": "", "rfc": { "abbreviation": "NCRFC", "name": "North Central River Forecast Center" }, "wfo": { "abbreviation": "ARX", "name": "La Crosse" }, "state": { "abbreviation": "WI", "name": "Wisconsin" }, "county": "Crawford", "timeZone": "CST6CDT", "latitude": 43.2106, "longitude": -91.101, "pedts": { "observed": "HTIRG", "forecast": "HTIFF" }, "status": { "observed": { "primary": 612.26, "primaryUnit": "ft", "secondary": 14, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-08-30T22:15:00Z" }, "forecast": { "primary": 612.2, "primaryUnit": "ft", "secondary": 13.6, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-08-31T00:00:00Z" } }, "flood": { "stageUnits": "ft", "flowUnits": "cfs", "categories": { "major": { "stage": 631, "flow": -9999 }, "moderate": { "stage": 628, "flow": -9999 }, "minor": { "stage": 625, "flow": -9999 }, "action": { "stage": 619, "flow": -9999 } }, "lro": { "minorCS": "< 0.05", "moderateCS": "< 0.05", "majorCS": "< 0.05", "producedTime": "2026-08-28T22:02:21Z", "interval": "SON" }, "crests": { "historic": [ { "occurredTime": "1965-04-24T00:00:00Z", "stage": 633.16, "flow": 275500, "preliminary": "R", "olddatum": false }, { "occurredTime": "2001-04-21T07:00:00Z", "stage": 631.22, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1997-04-14T00:00:00Z", "stage": 631.05, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2023-04-28T04:45:00Z", "stage": 630.26, "flow": 0, "preliminary": "P", "olddatum": false }, { "occurredTime": "1969-04-22T00:00:00Z", "stage": 629.42, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1993-06-30T00:00:00Z", "stage": 629.08, "flow": 192200, "preliminary": "O", "olddatum": false }, { "occurredTime": "2019-04-26T16:00:00Z", "stage": 628.74, "flow": 204840, "preliminary": "O", "olddatum": false }, { "occurredTime": "1952-04-23T00:00:00Z", "stage": 628.68, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1975-05-05T00:00:00Z", "stage": 628.45, "flow": 188000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1951-04-21T00:00:00Z", "stage": 628.38, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2011-04-17T20:00:00Z", "stage": 628.37, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2024-07-05T17:15:00Z", "stage": 628.06, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1967-04-10T00:00:00Z", "stage": 627.9, "flow": 190200, "preliminary": "O", "olddatum": false }, { "occurredTime": "1986-10-04T00:00:00Z", "stage": 627.53, "flow": 159500, "preliminary": "O", "olddatum": false }, { "occurredTime": "1986-04-10T00:00:00Z", "stage": 627.43, "flow": 172900, "preliminary": "O", "olddatum": false }, { "occurredTime": "1973-03-22T00:00:00Z", "stage": 627.05, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2019-06-02T18:45:00Z", "stage": 626.39, "flow": 168275, "preliminary": "O", "olddatum": false }, { "occurredTime": "2010-10-02T10:00:00Z", "stage": 626.33, "flow": 167300, "preliminary": "O", "olddatum": false }, { "occurredTime": "1954-05-10T00:00:00Z", "stage": 626.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1983-03-15T00:00:00Z", "stage": 626.02, "flow": 0, "preliminary": "O", "olddatum": false } ], "recent": [ { "occurredTime": "2024-07-05T17:15:00Z", "stage": 628.06, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2023-04-28T04:45:00Z", "stage": 630.26, "flow": 0, "preliminary": "P", "olddatum": false }, { "occurredTime": "2019-06-02T18:45:00Z", "stage": 626.39, "flow": 168275, "preliminary": "O", "olddatum": false }, { "occurredTime": "2019-04-26T16:00:00Z", "stage": 628.74, "flow": 204840, "preliminary": "O", "olddatum": false }, { "occurredTime": "2011-04-17T20:00:00Z", "stage": 628.37, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2010-10-02T10:00:00Z", "stage": 626.33, "flow": 167300, "preliminary": "O", "olddatum": false }, { "occurredTime": "2001-04-21T07:00:00Z", "stage": 631.22, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1997-04-14T00:00:00Z", "stage": 631.05, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1993-06-30T00:00:00Z", "stage": 629.08, "flow": 192200, "preliminary": "O", "olddatum": false }, { "occurredTime": "1986-10-04T00:00:00Z", "stage": 627.53, "flow": 159500, "preliminary": "O", "olddatum": false }, { "occurredTime": "1986-04-10T00:00:00Z", "stage": 627.43, "flow": 172900, "preliminary": "O", "olddatum": false }, { "occurredTime": "1983-03-15T00:00:00Z", "stage": 626.02, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1975-05-05T00:00:00Z", "stage": 628.45, "flow": 188000, "preliminary": "O", "olddatum": false }, { "occurredTime": "1973-03-22T00:00:00Z", "stage": 627.05, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1969-04-22T00:00:00Z", "stage": 629.42, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1967-04-10T00:00:00Z", "stage": 627.9, "flow": 190200, "preliminary": "O", "olddatum": false }, { "occurredTime": "1965-04-24T00:00:00Z", "stage": 633.16, "flow": 275500, "preliminary": "R", "olddatum": false }, { "occurredTime": "1954-05-10T00:00:00Z", "stage": 626.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1952-04-23T00:00:00Z", "stage": 628.68, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1951-04-21T00:00:00Z", "stage": 628.38, "flow": 0, "preliminary": "O", "olddatum": false } ] }, "lowWaters": { "historic": [] }, "impacts": [ { "stage": 633.16, "statement": "Water levels reach the flood of record. " }, { "stage": 633, "statement": "Water begins to flow over the lock walls and the protective earthen dikes at Dam 9." }, { "stage": 631, "statement": "Lock and dam 9 is closed to navigation." } ] }, "images": { "probability": { "weekint": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/LYNW3.SSTG.prob.weekint.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/LYNW3.QINE.prob.weekint.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/LYNW3.volume.prob.weekint.gif" }, "entperiod": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/LYNW3.SSTG.exceed.90day.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/LYNW3.QINE.exceed.90day.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/LYNW3.volume.exceed.90day.gif" }, "shortrange": "https://water.noaa.gov/resources/probabilistic/short_term/LYNW3.shortrange.hefs.png" }, "hydrograph": { "default": "https://water.noaa.gov/resources/hydrographs/lynw3_hg.png", "floodcat": "https://water.noaa.gov/resources/hydrographs/lynw3_record.png" }, "photos": [ { "id": "10843090047267312110", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 43.2106, -91.101 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/lynw3/10843090047267312110.jpeg", "caption": "Downstream View" } }, { "id": "10849444189388739054", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 43.2106, -91.101 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/lynw3/10849444189388739054.jpeg", "caption": "Upstream View" } } ] }, "dataAttribution": [ { "abbrev": "US Army Corps of Engineers", "text": "USACE - Building Strong", "title": "Observations courtesy of U.S. Army Corps of Engineers", "url": "https://water.usace.army.mil/office/mvp/location/LockDam_09" } ], "impactsLowWaters": [], "normalThreshold": null, "hydronotes": [ { "statement": "River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.", "effective": "0401", "expiration": "0930" }, { "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": "0331" } ], "datums": { "vertical": { "value": [] }, "horizontal": { "value": [] }, "notes": { "value": [] } }, "inundation": { "enabled": false, "url": "", "zeroDatum": null, "downloads": null, "siteSpecificInfo": "", "dataAttribution": [] }, "upstreamLid": "LNSI4", "downstreamLid": "MCGI4", "inService": { "enabled": true, "message": "" }, "lowThreshold": null, "forecastReliability": "Forecasts are issued routinely during the navigation season, and as needed at other times of the year.", "TruncateObs": "-1", "TruncateFcst": "7", "ObservedFloodCategory": "no_flooding", "ForecastFloodCategory": "no_flooding" }