{
"lid": "KSBN4",
"usgsId": "01407081",
"reachId": "",
"name": "Raritan Bay at Keansburg (IN MLLW)",
"description": "",
"rfc": {
"abbreviation": "MARFC",
"name": "Middle Atlantic River Forecast Center"
},
"wfo": {
"abbreviation": "PHI",
"name": "Mount Holly"
},
"state": {
"abbreviation": "NJ",
"name": "New Jersey"
},
"county": "Monmouth",
"timeZone": "EST5EDT",
"latitude": 40.4492,
"longitude": -74.1475,
"pedts": {
"observed": "HMIRA",
"forecast": "HMIFA"
},
"status": {
"observed": {
"primary": 3.24,
"primaryUnit": "ft",
"secondary": -999,
"secondaryUnit": "kcfs",
"floodCategory": "no_flooding",
"validTime": "2026-09-18T02:30:00Z"
},
"forecast": {
"primary": -999,
"primaryUnit": "",
"secondary": -999,
"secondaryUnit": "",
"floodCategory": "fcst_not_current",
"validTime": "0001-01-01T00:00:00Z"
}
},
"flood": {
"stageUnits": "ft",
"flowUnits": "cfs",
"categories": {
"major": {
"stage": 9,
"flow": -9999
},
"moderate": {
"stage": 8,
"flow": -9999
},
"minor": {
"stage": 7,
"flow": -9999
},
"action": {
"stage": -9999,
"flow": -9999
}
},
"lro": null,
"crests": {
"historic": [
{
"occurredTime": "2012-10-29T00:00:00Z",
"stage": 16.73,
"flow": 0,
"preliminary": "R",
"olddatum": false
},
{
"occurredTime": "1950-11-25T00:00:00Z",
"stage": 10.83,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2011-08-28T00:00:00Z",
"stage": 10.09,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2010-03-13T00:00:00Z",
"stage": 9.94,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2018-10-27T00:00:00Z",
"stage": 9.19,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2022-12-23T00:00:00Z",
"stage": 8.99,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2016-02-08T00:00:00Z",
"stage": 8.69,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2024-01-13T00:00:00Z",
"stage": 8.67,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2018-03-03T00:00:00Z",
"stage": 8.53,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2009-10-18T00:00:00Z",
"stage": 8.4,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2002-12-25T00:00:00Z",
"stage": 8.39,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2016-01-10T00:00:00Z",
"stage": 8.38,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2011-04-16T00:00:00Z",
"stage": 8.37,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2018-11-25T00:00:00Z",
"stage": 8.34,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2018-09-09T00:00:00Z",
"stage": 8.33,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2007-04-16T00:00:00Z",
"stage": 8.33,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2016-01-23T00:00:00Z",
"stage": 8.31,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2018-11-16T00:00:00Z",
"stage": 8.3,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2017-03-14T00:00:00Z",
"stage": 8.29,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2006-01-31T00:00:00Z",
"stage": 8.26,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2021-05-28T00:00:00Z",
"stage": 8.24,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2021-02-01T00:00:00Z",
"stage": 8.24,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2012-06-04T00:00:00Z",
"stage": 8.19,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2020-12-17T00:00:00Z",
"stage": 8.19,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2008-05-12T00:00:00Z",
"stage": 8.16,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2024-03-09T00:00:00Z",
"stage": 8.15,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2009-11-13T00:00:00Z",
"stage": 8.14,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2003-01-03T00:00:00Z",
"stage": 8.14,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2014-04-29T00:00:00Z",
"stage": 8.12,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2019-01-20T00:00:00Z",
"stage": 8.11,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2017-05-25T00:00:00Z",
"stage": 8.1,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2017-01-24T00:00:00Z",
"stage": 8.08,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2010-03-30T00:00:00Z",
"stage": 8.04,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2006-10-07T00:00:00Z",
"stage": 8.03,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2024-01-10T00:00:00Z",
"stage": 8.02,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2025-10-13T00:00:00Z",
"stage": 8,
"flow": 0,
"preliminary": "O",
"olddatum": false
}
],
"recent": [
{
"occurredTime": "2025-10-13T00:00:00Z",
"stage": 8,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2024-03-09T00:00:00Z",
"stage": 8.15,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2024-01-13T00:00:00Z",
"stage": 8.67,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2024-01-10T00:00:00Z",
"stage": 8.02,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2022-12-23T00:00:00Z",
"stage": 8.99,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2021-05-28T00:00:00Z",
"stage": 8.24,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2021-02-01T00:00:00Z",
"stage": 8.24,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2020-12-17T00:00:00Z",
"stage": 8.19,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2019-01-20T00:00:00Z",
"stage": 8.11,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2018-11-25T00:00:00Z",
"stage": 8.34,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2018-11-16T00:00:00Z",
"stage": 8.3,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2018-10-27T00:00:00Z",
"stage": 9.19,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2018-09-09T00:00:00Z",
"stage": 8.33,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2018-03-03T00:00:00Z",
"stage": 8.53,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2017-05-25T00:00:00Z",
"stage": 8.1,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2017-03-14T00:00:00Z",
"stage": 8.29,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2017-01-24T00:00:00Z",
"stage": 8.08,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2016-02-08T00:00:00Z",
"stage": 8.69,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2016-01-23T00:00:00Z",
"stage": 8.31,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2016-01-10T00:00:00Z",
"stage": 8.38,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2014-04-29T00:00:00Z",
"stage": 8.12,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2012-10-29T00:00:00Z",
"stage": 16.73,
"flow": 0,
"preliminary": "R",
"olddatum": false
},
{
"occurredTime": "2012-06-04T00:00:00Z",
"stage": 8.19,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2011-08-28T00:00:00Z",
"stage": 10.09,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2011-04-16T00:00:00Z",
"stage": 8.37,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2010-03-30T00:00:00Z",
"stage": 8.04,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2010-03-13T00:00:00Z",
"stage": 9.94,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2009-11-13T00:00:00Z",
"stage": 8.14,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2009-10-18T00:00:00Z",
"stage": 8.4,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2008-05-12T00:00:00Z",
"stage": 8.16,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2007-04-16T00:00:00Z",
"stage": 8.33,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2006-10-07T00:00:00Z",
"stage": 8.03,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2006-01-31T00:00:00Z",
"stage": 8.26,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2003-01-03T00:00:00Z",
"stage": 8.14,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2002-12-25T00:00:00Z",
"stage": 8.39,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "1950-11-25T00:00:00Z",
"stage": 10.83,
"flow": 0,
"preliminary": "O",
"olddatum": false
}
]
},
"lowWaters": {
"historic": []
},
"impacts": [
{
"stage": 16.73,
"statement": "(Mean Lower Low Water (MLLW)) The level reached on October 29, 2012 during Post Tropical Cyclone Sandy."
},
{
"stage": 10.83,
"statement": "(MLLW) The level reached on November 25, 1950."
},
{
"stage": 10.09,
"statement": "(MLLW) The level reached on August 28, 2011 during Hurricane Irene."
},
{
"stage": 9.94,
"statement": "(MLLW) The level reached on March 13, 2010."
},
{
"stage": 9.19,
"statement": "(MLLW) The level reached on October 27, 2018."
},
{
"stage": 9,
"statement": "(MLLW) MAJOR FLOODING. At this level, flooding starts to become severe enough to begin causing structural damage along with widespread flooding of roadways in Aberdeen, Keyport, Union Beach, Keansburg and Middletown Township. Vulnerable homes and businesses may be severely damaged or destroyed as water levels rise further above this threshold. Numerous roads become impassable and some neighborhoods may be isolated. The flood waters become a danger to anyone attempting to cross on foot or in a vehicle. "
},
{
"stage": 8,
"statement": "(MLLW) MODERATE FLOODING. At this level, widespread flooding of roadways begins due to high water and/or wave action with many roads becoming impassable in Aberdeen, Keyport, Union Beach, Keansburg and Middletown Township. Lives may be at risk when people put themselves in harm's way. Some damage to vulnerable structures may begin to occur. COASTAL FLOOD WARNING LEVEL."
},
{
"stage": 7.8,
"statement": "(MLLW) Flooding begins along sections of NJ Route 35 in Keyport and Hazlet as water backs up into tidal streams in the communities. Flooding begins along sections of NJ Route 36 in Keyport, Hazlet and Middletown Township as water backs up into tidal streams in the communities. "
},
{
"stage": 7.3,
"statement": "(MLLW) COASTAL FLOOD ADVISORY LEVEL."
},
{
"stage": 7.2,
"statement": "(MLLW) Flooding begins in Aberdeen, Keyport (along West Front Street), Union Beach, Keansburg and Middletown Township. "
},
{
"stage": 7,
"statement": "(MLLW) MINOR FLOODING."
}
]
},
"images": {
"probability": {
"weekint": {
"stage": "",
"flow": "",
"volume": ""
},
"entperiod": {
"stage": "",
"flow": "",
"volume": ""
},
"shortrange": ""
},
"hydrograph": {
"default": "https://water.noaa.gov/resources/hydrographs/ksbn4_hg.png",
"floodcat": "https://water.noaa.gov/resources/hydrographs/ksbn4_record.png"
},
"photos": []
},
"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": "01407081",
"title": "Observations courtesy of U.S. Geological Survey",
"url": "https://waterdata.usgs.gov/nwis/inventory/?site_no=01407081"
}
],
"impactsLowWaters": [],
"normalThreshold": {
"value": 0,
"units": "ft"
},
"hydronotes": [
{
"statement": "Please refer to our \r\n\r\nCoastal Hazard Message for specific information regarding Coastal Flood Watches, Warnings and Advisories. \r\nDuring tropical cyclones, please refer\r\nhere for additional storm surge information.",
"effective": "0101",
"expiration": "1231"
},
{
"statement": "Flood impacts are based on long-term averages. Actual impacts from any tidal flooding event may vary due to factors such as rainfall, wave action, and the number of tide cycles during which there is an onshore flow.",
"effective": "0101",
"expiration": "1231"
}
],
"datums": {
"vertical": {
"value": [
{
"label": "Mean Lower Low Water",
"abbrev": "MLLW*",
"description": "The average of the lower low water height of each tidal day observed over the National Tidal Datum Epoch. For stations with shorter series, comparison of simultaneous observations with a control tide station is made in order to derive the equivalent datum of the National Tidal Datum Epoch.",
"value": 0
},
{
"label": "Mean Low Water",
"abbrev": "MLW",
"description": "The average of all the low water heights observed over the National Tidal Datum Epoch. For stations with shorter series, comparison of simultaneous observations with a control tide station is made in order to derive the equivalent datum of the National Tidal Datum Epoch.",
"value": -0.205
},
{
"label": "Mean Sea Level",
"abbrev": "MSL",
"description": "The arithmetic mean of hourly heights observed over the National Tidal Datum Epoch. Shorter series are specified in the name; e.g. monthly mean sea level and yearly mean sea level.",
"value": -2.725
},
{
"label": "Mean High Water",
"abbrev": "MHW",
"description": "The average of all the high water heights observed over the National Tidal Datum Epoch. For stations with shorter series, comparison of simultaneous observations with a control tide station is made in order to derive the equivalent datum of the National Tidal Datum Epoch.",
"value": -5.115
},
{
"label": "Mean Higher High Water",
"abbrev": "MHHW*",
"description": "The average of the higher high water height of each tidal day observed over the National Tidal Datum Epoch. For stations with shorter series, comparison of simultaneous observations with a control tide station is made in order to derive the equivalent datum of the National Tidal Datum Epoch.",
"value": -5.437
},
{
"label": "North American Vertical Datum of 1988",
"abbrev": "NAVD88",
"description": "A fixed reference for elevations determined by geodetic leveling. The datum was derived from a general adjustment of the first-order terrestrial leveling nets of the United States, Canada, and Mexico. In the adjustment, only the height of the primary tidal bench mark, referenced to the International Great Lakes Datum of 1985 (IGLD 85) local mean sea level height value, at Father Point, Rimouski, Quebec, Canada was held fixed, thus providing minimum constraint. NAVD 88 and IGLD 85 are identical. However, NAVD 88 bench mark values are given in Helmert orthometric height units while IGLD 85 values are in dynamic heights. See International Great Lakes Datum of 1985, National Geodetic Vertical Datum of 1929, and geopotential difference. NAVD 88 should not be used as Mean Sea Level.",
"value": -2.93
}
]
},
"horizontal": {
"value": []
},
"notes": {
"value": []
}
},
"inundation": {
"enabled": false,
"url": "",
"zeroDatum": null,
"downloads": null,
"siteSpecificInfo": "",
"dataAttribution": []
},
"upstreamLid": "",
"downstreamLid": "",
"inService": {
"enabled": true,
"message": ""
},
"lowThreshold": {
"units": "ft",
"value": -2
},
"forecastReliability": "Forecasts are not available. Only observed stages are available for this point.",
"TruncateObs": "-1",
"TruncateFcst": "7",
"ObservedFloodCategory": "no_flooding",
"ForecastFloodCategory": "fcst_not_current"
}