{
"lid": "PABN4",
"usgsId": "01396060",
"reachId": "",
"name": "Arthur Kill at Perth Amboy (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": "Middlesex",
"timeZone": "EST5EDT",
"latitude": 40.5039,
"longitude": -74.2622,
"pedts": {
"observed": "HMIRG",
"forecast": "HMIFE"
},
"status": {
"observed": {
"primary": 3.11,
"primaryUnit": "ft",
"secondary": -999,
"secondaryUnit": "kcfs",
"floodCategory": "no_flooding",
"validTime": "2026-09-18T02:00:00Z"
},
"forecast": {
"primary": 6,
"primaryUnit": "ft",
"secondary": -999,
"secondaryUnit": "kcfs",
"floodCategory": "no_flooding",
"validTime": "2026-09-19T19:00:00Z"
}
},
"flood": {
"stageUnits": "ft",
"flowUnits": "cfs",
"categories": {
"major": {
"stage": 9.2,
"flow": -9999
},
"moderate": {
"stage": 8.2,
"flow": -9999
},
"minor": {
"stage": 7.2,
"flow": -9999
},
"action": {
"stage": -9999,
"flow": -9999
}
},
"lro": null,
"crests": {
"historic": [
{
"occurredTime": "2022-12-23T00:00:00Z",
"stage": 9.39,
"flow": 0,
"preliminary": "R",
"olddatum": false
},
{
"occurredTime": "2018-10-27T00:00:00Z",
"stage": 9.39,
"flow": 0,
"preliminary": "R",
"olddatum": false
},
{
"occurredTime": "2024-01-13T00:00:00Z",
"stage": 8.83,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2018-09-09T00:00:00Z",
"stage": 8.63,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2018-03-03T00:00:00Z",
"stage": 8.54,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2018-11-25T00:00:00Z",
"stage": 8.54,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2018-11-16T00:00:00Z",
"stage": 8.54,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2024-03-09T00:00:00Z",
"stage": 8.5,
"flow": 0,
"preliminary": "R",
"olddatum": false
},
{
"occurredTime": "2021-05-28T00:00:00Z",
"stage": 8.48,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2021-02-01T00:00:00Z",
"stage": 8.45,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2017-03-14T00:00:00Z",
"stage": 8.44,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2020-12-17T00:00:00Z",
"stage": 8.44,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2022-04-18T00:00:00Z",
"stage": 8.43,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2019-01-20T00:00:00Z",
"stage": 8.38,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2017-05-25T00:00:00Z",
"stage": 8.36,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2018-04-15T00:00:00Z",
"stage": 8.29,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2019-03-21T00:00:00Z",
"stage": 8.26,
"flow": 0,
"preliminary": "O",
"olddatum": false
}
],
"recent": [
{
"occurredTime": "2024-03-09T00:00:00Z",
"stage": 8.5,
"flow": 0,
"preliminary": "R",
"olddatum": false
},
{
"occurredTime": "2024-01-13T00:00:00Z",
"stage": 8.83,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2022-12-23T00:00:00Z",
"stage": 9.39,
"flow": 0,
"preliminary": "R",
"olddatum": false
},
{
"occurredTime": "2022-04-18T00:00:00Z",
"stage": 8.43,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2021-05-28T00:00:00Z",
"stage": 8.48,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2021-02-01T00:00:00Z",
"stage": 8.45,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2020-12-17T00:00:00Z",
"stage": 8.44,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2019-03-21T00:00:00Z",
"stage": 8.26,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2019-01-20T00:00:00Z",
"stage": 8.38,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2018-11-25T00:00:00Z",
"stage": 8.54,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2018-11-16T00:00:00Z",
"stage": 8.54,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2018-10-27T00:00:00Z",
"stage": 9.39,
"flow": 0,
"preliminary": "R",
"olddatum": false
},
{
"occurredTime": "2018-09-09T00:00:00Z",
"stage": 8.63,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2018-04-15T00:00:00Z",
"stage": 8.29,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2018-03-03T00:00:00Z",
"stage": 8.54,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2017-05-25T00:00:00Z",
"stage": 8.36,
"flow": 0,
"preliminary": "O",
"olddatum": false
},
{
"occurredTime": "2017-03-14T00:00:00Z",
"stage": 8.44,
"flow": 0,
"preliminary": "O",
"olddatum": false
}
]
},
"lowWaters": {
"historic": []
},
"impacts": [
{
"stage": 9.39,
"statement": "(Mean Lower Low Water (MLLW)) The level reached on October 27, 2018 and on December 23, 2022."
},
{
"stage": 9.2,
"statement": "(MLLW) MAJOR FLOODING. At this level, widespread roadway flooding begins in Middlesex County near the Arthur Kill, the lower Raritan River, the Raritan Bay and the tidal tributaries. Vulnerable homes and businesses may be damaged as water levels rise further above this threshold. Numerous roads become impassable and some neighborhoods may be isolated. The water becomes a danger to anyone who attempts to cross on foot or in a vehicle."
},
{
"stage": 8.2,
"statement": "(MLLW) MODERATE FLOODING. At this level, additional roadways in Middlesex County near the Arthur Kill, the lower Raritan River, the Raritan Bay and the tidal tributaries begin to flood. 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 Woodbridge Creek in Woodbridge Township and Perth Amboy, especially around State Street. Flooding begins in Perth Amboy. Flooding begins along the South River in East Brunswick Township, South River and Sayreville. Flooding begins around Victory Plaza in Sayreville (US Route 9 and NJ Route 35). Flooding begins along North Rosewell Avenue in South Amboy. Flooding begins along NJ Route 35 in Laurence Harbor."
},
{
"stage": 7.5,
"statement": "(MLLW) COASTAL FLOOD ADVISORY LEVEL."
},
{
"stage": 7.2,
"statement": "(MLLW) MINOR FLOODING."
}
]
},
"images": {
"probability": {
"weekint": {
"stage": "",
"flow": "",
"volume": ""
},
"entperiod": {
"stage": "",
"flow": "",
"volume": ""
},
"shortrange": ""
},
"hydrograph": {
"default": "https://water.noaa.gov/resources/hydrographs/pabn4_hg.png",
"floodcat": "https://water.noaa.gov/resources/hydrographs/pabn4_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": "01396060",
"title": "Observations courtesy of U.S. Geological Survey",
"url": "https://waterdata.usgs.gov/nwis/inventory/?site_no=01396060"
}
],
"impactsLowWaters": [],
"normalThreshold": {
"value": 0,
"units": "ft"
},
"hydronotes": [
{
"statement": " \r\nPlease refer to our Coastal Hazard Message for specific information regarding Coastal Flood Watches, Warnings and Advisories. 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. \r\nDuring tropical cyclones, please refer \r\nhere for additional storm surge information.",
"effective": "0101",
"expiration": "1231"
},
{
"statement": "\r\nDuring a Tropical Storm or Hurricane Watch or Warning, inundation mapping provided by the \r\nNational Hurricane Center reflects a reasonable worst case scenario. The experimental forecast above is the total water forecast that is expected to occur.",
"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": -0.208
},
{
"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": -2.877
},
{
"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": -5.383
},
{
"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": -5.71
},
{
"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": -3.061
}
]
},
"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 issued routinely year-round.",
"TruncateObs": "-1",
"TruncateFcst": "3",
"ObservedFloodCategory": "no_flooding",
"ForecastFloodCategory": "no_flooding"
}