{ "lid": "LSLI2", "usgsId": "411925089063901", "reachId": "14837693", "name": "Illinois River near La Salle", "description": "", "rfc": { "abbreviation": "NCRFC", "name": "North Central River Forecast Center" }, "wfo": { "abbreviation": "LOT", "name": "Romeoville" }, "state": { "abbreviation": "IL", "name": "Illinois" }, "county": "La Salle", "timeZone": "CST6CDT", "latitude": 41.323611111111, "longitude": -89.110833333333, "pedts": { "observed": "HGIRG", "forecast": "HGIFF" }, "status": { "observed": { "primary": 12.16, "primaryUnit": "ft", "secondary": 8.86, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-08-30T20:45:00Z" }, "forecast": { "primary": 12.5, "primaryUnit": "ft", "secondary": 10.9, "secondaryUnit": "kcfs", "floodCategory": "no_flooding", "validTime": "2026-08-31T00:00:00Z" } }, "flood": { "stageUnits": "ft", "flowUnits": "cfs", "categories": { "major": { "stage": 31, "flow": -9999 }, "moderate": { "stage": 27, "flow": -9999 }, "minor": { "stage": 20, "flow": -9999 }, "action": { "stage": 19, "flow": -9999 } }, "lro": { "minorCS": "0.44", "moderateCS": "0.14", "majorCS": "0.1", "producedTime": "2026-08-28T20:02:41Z", "interval": "SON" }, "crests": { "historic": [ { "occurredTime": "2013-04-20T00:00:00Z", "stage": 34.44, "flow": 0, "preliminary": "R", "olddatum": false }, { "occurredTime": "2008-09-16T00:00:00Z", "stage": 33.79, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2020-05-20T00:00:00Z", "stage": 33.14, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2019-05-03T00:00:00Z", "stage": 32.14, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1982-12-05T00:00:00Z", "stage": 32.05, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2009-03-12T00:00:00Z", "stage": 32.02, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1979-03-21T00:00:00Z", "stage": 31.75, "flow": 0, "preliminary": "O", "olddatum": false }, { 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"1977-09-19T00:00:00Z", "stage": 27.8, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-07-20T00:00:00Z", "stage": 27.62, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1976-03-07T00:00:00Z", "stage": 27.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1954-10-12T00:00:00Z", "stage": 27.4, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1973-04-24T00:00:00Z", "stage": 27.26, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2017-05-02T20:15:00Z", "stage": 27.25, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1993-01-06T00:00:00Z", "stage": 27.18, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1948-03-20T00:00:00Z", "stage": 27, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1986-10-05T00:00:00Z", "stage": 26.9, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1902-07-20T00:00:00Z", "stage": 26.9, "flow": 0, "preliminary": "O", "olddatum": true }, { "occurredTime": "2019-09-30T00:00:00Z", "stage": 26.77, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1974-05-23T00:00:00Z", "stage": 26.66, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1983-04-06T00:00:00Z", "stage": 26.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2020-05-01T00:00:00Z", "stage": 26.54, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1957-07-15T00:00:00Z", "stage": 26.47, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1962-03-23T00:00:00Z", "stage": 26.47, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1966-05-14T00:00:00Z", "stage": 26.45, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1960-03-31T00:00:00Z", "stage": 25.9, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": 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"2019-07-05T00:00:00Z", "stage": 21.89, "flow": 0, "preliminary": "O", "olddatum": false } ], "recent": [ { "occurredTime": "2020-05-20T00:00:00Z", "stage": 33.14, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2020-05-01T00:00:00Z", "stage": 26.54, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2020-01-13T00:00:00Z", "stage": 23.69, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2019-11-01T00:00:00Z", "stage": 24.56, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2019-09-30T00:00:00Z", "stage": 26.77, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2019-07-05T00:00:00Z", "stage": 21.89, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2019-05-03T00:00:00Z", "stage": 32.14, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2019-03-16T00:00:00Z", "stage": 22.29, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2019-02-09T00:00:00Z", "stage": 24.59, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2018-02-23T03:15:00Z", "stage": 30.61, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2017-07-24T08:45:00Z", "stage": 23.02, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2017-05-02T20:15:00Z", "stage": 27.25, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2017-04-08T00:45:00Z", "stage": 24.56, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2015-12-31T00:00:00Z", "stage": 29.73, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2015-06-24T00:00:00Z", "stage": 28.98, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2013-04-20T00:00:00Z", "stage": 34.44, "flow": 0, "preliminary": "R", "olddatum": false }, { "occurredTime": "2010-06-25T00:00:00Z", "stage": 25.17, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2009-03-12T00:00:00Z", "stage": 32.02, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2008-09-16T00:00:00Z", "stage": 33.79, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2007-08-26T00:00:00Z", "stage": 30.34, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2005-01-15T00:00:00Z", "stage": 28.94, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2004-06-02T03:30:00Z", "stage": 23.86, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2002-05-14T06:30:00Z", "stage": 28.86, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "2000-07-12T00:00:00Z", "stage": 22.59, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1999-01-26T00:00:00Z", "stage": 23.81, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1998-05-10T00:00:00Z", "stage": 28.14, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1997-02-23T00:00:00Z", "stage": 30.83, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1996-07-20T00:00:00Z", "stage": 27.62, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1993-01-06T00:00:00Z", "stage": 27.18, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1990-11-29T00:00:00Z", "stage": 29.27, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1989-09-11T00:00:00Z", "stage": 23.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1986-10-05T00:00:00Z", "stage": 26.9, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1985-03-06T00:00:00Z", "stage": 31.7, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1983-04-06T00:00:00Z", "stage": 26.6, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1982-12-05T00:00:00Z", "stage": 32.05, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1979-03-21T00:00:00Z", "stage": 31.75, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1977-09-19T00:00:00Z", "stage": 27.8, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1976-03-07T00:00:00Z", "stage": 27.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1974-05-23T00:00:00Z", "stage": 26.66, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1973-04-24T00:00:00Z", "stage": 27.26, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1970-05-16T00:00:00Z", "stage": 30.1, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1966-05-14T00:00:00Z", "stage": 26.45, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1965-04-26T00:00:00Z", "stage": 23.35, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1962-03-23T00:00:00Z", "stage": 26.47, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1961-09-27T00:00:00Z", "stage": 25.28, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1960-03-31T00:00:00Z", "stage": 25.9, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1957-07-15T00:00:00Z", "stage": 26.47, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1954-10-12T00:00:00Z", "stage": 27.4, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1951-02-20T00:00:00Z", "stage": 25.5, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1950-04-26T00:00:00Z", "stage": 28.7, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1948-03-20T00:00:00Z", "stage": 27, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1943-05-22T00:00:00Z", "stage": 31, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1942-02-08T00:00:00Z", "stage": 23.2, "flow": 0, "preliminary": "O", "olddatum": true }, { "occurredTime": "1932-05-15T00:00:00Z", "stage": 23.8, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1922-03-13T00:00:00Z", "stage": 23.8, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1916-01-22T00:00:00Z", "stage": 30.2, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1913-03-29T00:00:00Z", "stage": 28, "flow": 0, "preliminary": "O", "olddatum": true }, { "occurredTime": "1908-03-08T00:00:00Z", "stage": 28.8, "flow": 0, "preliminary": "O", "olddatum": true }, { "occurredTime": "1907-01-21T00:00:00Z", "stage": 28.6, "flow": 0, "preliminary": "O", "olddatum": true }, { "occurredTime": "1904-03-27T00:00:00Z", "stage": 29.2, "flow": 0, "preliminary": "O", "olddatum": true }, { "occurredTime": "1902-07-20T00:00:00Z", "stage": 26.9, "flow": 0, "preliminary": "O", "olddatum": true }, { "occurredTime": "1869-06-29T00:00:00Z", "stage": 24.1, "flow": 0, "preliminary": "O", "olddatum": true } ] }, "lowWaters": { "historic": [] }, "impacts": [ { "stage": 34.5, "statement": "North Utica Village Hall, police department, and wastewater treatment plant property are threatened." }, { "stage": 33, "statement": "A couple structures are threatened near the river in downtown La Salle." }, { "stage": 32, "statement": "Numerous industrial and utility properties are threatened along Water Street near downtown LaSalle. A few residences threatened in North Utica. IL-178 (Clark Street) threatened in North Utica." }, { "stage": 31, "statement": "A couple structures threatened in North Utica." }, { "stage": 30, "statement": "La Salle water pumping station property is threatened." }, { "stage": 28.5, "statement": "Water Street is threatened in Peru." }, { "stage": 28, "statement": "Dee Bennet Road is threatened between Ottawa and Utica." }, { "stage": 22, "statement": "Lower parking lot at Starved Rock State Park is inundated east of La Salle. High water levels begin to impact shipping interests along the river." }, { "stage": 20, "statement": "Agricultural areas in La Salle, Spring Valley, and Peru are inundated." }, { "stage": 17.5, "statement": "Low-lying agricultural land near the river is inundated." } ] }, "images": { "probability": { "weekint": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/LSLI2.SSTG.prob.weekint.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/LSLI2.QINE.prob.weekint.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/LSLI2.volume.prob.weekint.gif" }, "entperiod": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/LSLI2.SSTG.exceed.90day.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/LSLI2.QINE.exceed.90day.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/LSLI2.volume.exceed.90day.gif" }, "shortrange": "https://water.noaa.gov/resources/probabilistic/short_term/LSLI2.shortrange.hefs.png" }, "hydrograph": { "default": "https://water.noaa.gov/resources/hydrographs/lsli2_hg.png", "floodcat": "https://water.noaa.gov/resources/hydrographs/lsli2_record.png" }, "photos": [] }, "dataAttribution": [ { "abbrev": "USGS", "text": "411925089063901", "title": "Observations courtesy of U.S. Geological Survey", "url": "https://waterdata.usgs.gov/nwis/inventory/?site_no=411925089063901" }, { "abbrev": "COE", "text": "Website", "title": "Observations courtesy of U.S. Army Corps of Engineers", "url": "https://rivergages.mvr.usace.army.mil/WaterControl/stationinfo2.cfm?sid=LSLI2" } ], "impactsLowWaters": [ { "value": "8.7", "impact": "Low water levels begin to impact shipping interests along the river." } ], "normalThreshold": { "value": 10.2, "units": "ft" }, "hydronotes": [ { "statement": "River forecasts for this location take into account past and future precipitation. The stages/flows that will occur may be different if future rainfall is different than forecast.", "effective": "1001", "expiration": "0331" }, { "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" } ], "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": 430 } ] }, "horizontal": { "value": [] }, "notes": { "value": [] } }, "inundation": { "enabled": false, "url": "", "zeroDatum": null, "downloads": null, "siteSpecificInfo": "", "dataAttribution": [] }, "upstreamLid": "SRDI2", "downstreamLid": "HNYI2", "inService": { "enabled": true, "message": "" }, "lowThreshold": { "units": "ft", "value": 8.7 }, "forecastReliability": "Forecasts are issued routinely year-round.", "TruncateObs": "-1", "TruncateFcst": "7", "ObservedFloodCategory": "no_flooding", "ForecastFloodCategory": "no_flooding" }