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2850, "preliminary": "O", "olddatum": true }, { "occurredTime": "1964-06-22T16:00:00Z", "stage": 5.81, "flow": 6080, "preliminary": "O", "olddatum": true }, { "occurredTime": "1963-02-08T00:00:00Z", "stage": 4.74, "flow": 1020, "preliminary": "O", "olddatum": true }, { "occurredTime": "1962-06-11T18:00:00Z", "stage": 6.93, "flow": 9720, "preliminary": "O", "olddatum": true }, { "occurredTime": "1961-05-31T00:00:00Z", "stage": 3.81, "flow": 1100, "preliminary": "O", "olddatum": true }, { "occurredTime": "1960-03-30T00:00:00Z", "stage": 8.6, "flow": 13500, "preliminary": "O", "olddatum": true }, { "occurredTime": "1959-05-06T00:00:00Z", "stage": 4.63, "flow": 2480, "preliminary": "O", "olddatum": true }, { "occurredTime": "1958-07-30T00:00:00Z", "stage": 9.43, "flow": 3370, "preliminary": "O", "olddatum": true }, { "occurredTime": "1957-06-17T00:00:00Z", "stage": 8.48, "flow": 3410, "preliminary": "O", "olddatum": true }, { "occurredTime": "1956-06-26T00:00:00Z", "stage": 7.5, "flow": 1440, "preliminary": "O", "olddatum": true }, { "occurredTime": "1955-03-11T00:00:00Z", "stage": 5.64, "flow": 1170, "preliminary": "O", "olddatum": true }, { "occurredTime": "1954-06-21T00:00:00Z", "stage": 6.8, "flow": 4100, "preliminary": "O", "olddatum": true }, { "occurredTime": "1953-05-10T00:00:00Z", "stage": 8.1, "flow": 7550, "preliminary": "O", "olddatum": true }, { "occurredTime": "1952-02-13T00:00:00Z", "stage": 6.4, "flow": 3470, "preliminary": "O", "olddatum": true }, { "occurredTime": "1951-05-20T00:00:00Z", "stage": 8.15, "flow": 8410, "preliminary": "O", "olddatum": true }, { "occurredTime": "1950-08-12T00:00:00Z", "stage": 8.6, "flow": 8200, "preliminary": "O", "olddatum": true }, { "occurredTime": "1949-04-08T00:00:00Z", "stage": 9.4, "flow": 8760, "preliminary": "O", "olddatum": true }, { "occurredTime": "1949-03-11T00:00:00Z", "stage": 15.63, "flow": 0, "preliminary": "O", "olddatum": false }, { "occurredTime": "1948-08-11T00:00:00Z", "stage": 7.13, "flow": 3940, "preliminary": "O", "olddatum": true }, { "occurredTime": "1947-06-26T00:00:00Z", "stage": 11.1, "flow": 12600, "preliminary": "O", "olddatum": true }, { "occurredTime": "1946-05-30T00:00:00Z", "stage": 5.4, "flow": 1800, "preliminary": "O", "olddatum": true }, { "occurredTime": "1945-06-10T00:00:00Z", "stage": 7.8, "flow": 5400, "preliminary": "O", "olddatum": true }, { "occurredTime": "1944-05-13T00:00:00Z", "stage": 11.8, "flow": 14300, "preliminary": "O", "olddatum": true }, { "occurredTime": "1943-06-14T00:00:00Z", "stage": 5.4, "flow": 2100, "preliminary": "O", "olddatum": true }, { "occurredTime": "1942-06-21T00:00:00Z", "stage": 10.2, "flow": 10300, "preliminary": "O", "olddatum": true }, { "occurredTime": "1941-06-03T00:00:00Z", "stage": 6.8, "flow": 3800, "preliminary": "O", "olddatum": true }, { "occurredTime": "1940-06-06T00:00:00Z", "stage": 11.7, "flow": 14100, "preliminary": "O", "olddatum": true }, { "occurredTime": "1903-05-30T00:00:00Z", "stage": 9.6, "flow": 9400, "preliminary": "O", "olddatum": true }, { "occurredTime": "1902-09-30T00:00:00Z", "stage": 6, "flow": 2940, "preliminary": "O", "olddatum": true }, { "occurredTime": "1900-04-29T00:00:00Z", "stage": 3.7, "flow": 1250, "preliminary": "O", "olddatum": true }, { "occurredTime": "1899-06-28T00:00:00Z", "stage": 3.75, "flow": 1380, "preliminary": "O", "olddatum": true }, { "occurredTime": "1898-06-05T00:00:00Z", "stage": 5.4, "flow": 3670, "preliminary": "O", "olddatum": true }, { "occurredTime": "1897-04-08T00:00:00Z", "stage": 6.95, "flow": 6390, "preliminary": "O", "olddatum": true } ] }, "lowWaters": { "historic": [] }, "impacts": [ { "stage": 19.5, "statement": "Water reaches the bottom of the Highway 81 bridge." }, { "stage": 17, "statement": "The local levee protecting Tahazouka Park is overtopped." }, { "stage": 16, "statement": "U.S. Highway 81 will begin to be overtopped." }, { "stage": 13, "statement": "The river is bankfull within the city limits of Norfolk. Outside the Norfolk area, serious flooding of lowlands and bridge approaches take place. Some county roads and rural homes flood." }, { "stage": 12, "statement": "Considerable lowland flooding and approaches to bridges flood upstream and downstream of the gage for several miles." }, { "stage": 10, "statement": "The trail under Highway 81 begins to flood." } ] }, "images": { "probability": { "weekint": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/NFKN1.SSTG.prob.weekint.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/NFKN1.QINE.prob.weekint.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/NFKN1.volume.prob.weekint.gif" }, "entperiod": { "stage": "https://water.noaa.gov/resources/probabilistic/exceedance/NFKN1.SSTG.exceed.90day.gif", "flow": "https://water.noaa.gov/resources/probabilistic/exceedance/NFKN1.QINE.exceed.90day.gif", "volume": "https://water.noaa.gov/resources/probabilistic/exceedance/NFKN1.volume.exceed.90day.gif" }, "shortrange": "https://water.noaa.gov/resources/probabilistic/short_term/NFKN1.shortrange.hefs.png" }, "hydrograph": { "default": "https://water.noaa.gov/resources/hydrographs/nfkn1_hg.png", "floodcat": "https://water.noaa.gov/resources/hydrographs/nfkn1_record.png" }, "photos": [ { "id": "8993695636623856110", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 42.00378, -97.426033 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/nfkn1/8993695636623856110.jpeg", "caption": "Looking downstream" } }, { "id": "3407370457995022830", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 42.00378, -97.426033 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/nfkn1/3407370457995022830.jpeg", "caption": "Looking downstream, low flow (stage = 1.2 feet)" } }, { "id": "7253862886763925998", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 42.00378, -97.426033 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/nfkn1/7253862886763925998.jpeg", "caption": "Gage house" } }, { "id": "7263227152419787246", "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 42.00378, -97.426033 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/nfkn1/7263227152419787246.jpeg", "caption": "Looking upstream" } } ] }, "dataAttribution": [ { "abbrev": "USGS", "text": "06799000", "title": "Observations courtesy of the USGS", "url": "https://waterdata.usgs.gov/monitoring-location/06799000" } ], "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" }, { "statement": "Stage may be affected by ice.", "effective": "1101", "expiration": "0331" } ], "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": 1500.95 } ] }, "horizontal": { "value": [] }, "notes": { "value": [] } }, "inundation": { "enabled": false, "url": "", "zeroDatum": null, "downloads": null, "siteSpecificInfo": "", "dataAttribution": [] }, "upstreamLid": "TLDN1", "downstreamLid": "PLGN1", "inService": { "enabled": true, "message": "" }, "lowThreshold": null, "forecastReliability": "Forecasts are issued as needed during times of high water, but are not routinely available.", "TruncateObs": "-1", "TruncateFcst": "5", "ObservedFloodCategory": "no_flooding", "ForecastFloodCategory": "fcst_not_current" }