9/19/2024
WT Staff
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September 19, 2024 updated 1147 pm EDT
Coastal and estuary flooding ends, Great South Bay at Lindenhurst, Hudson River at Piermont
Streamflow Situation from the USGS network of streamflow gauges in New York
A coastal flood watch from National Weather Service ended at 11 am, the remains of which left elevated the water level in the Hudson River estuary as measured at Piermont. Flooding at Piermont and Great South Bay at Lindenhurst ended after 1 pm.
An increasing number of streamflow gauges are recording water levels below 25th percentile, rated below normal to much below seasonal normal Thursday. Normal to above normal flows are trending in the south-flowing and northeast watersheds. The drought map has taken on another area below normal, the central Chautauqua County below normal in Allegheny River watershed. Four areas again rated below normal, one in each of the drainage basins, Lake Ontario watershed of the northwest basin remains below normal through Niagara, Orleans and northwest Monroe Counties, along with the Niagara River - Lake Erie basin below normal along the north of Cattaraugus County. The central drainage basin's Lower Hudson River watershed is yet rated below normal through Putnam and Westchester Counties. In the Upper Hudson River watershed, Essex, Hamilton and Warren Counties have surface area rated below normal again today. As of this report, there are no severe weather events in the forecast, no extreme high flows or floods, and no first percentile low flows recorded in the network.
From the National Hurricane Center, the remnants of Tropical Depression Gordon show up as an area of disorganized showers and thunderstorms located over the central subtropical Atlantic. Some development of this system is possible while it moves generally northward over the next several days. Formation chance through 48 hours...low...20 percent. Formation chance through 7 days...low...30 percent.
WT HAB Tracker from the satellite monitoring program of the NOAA National Centers for Coastal Ocean Science(NCCOS), Cyanobacteria Assessment Network (CyAN) and State sources where available
New York
Three hundred and fifty-nine HABs are active on the notifications board Thursday morning, down from 379 yesterday afternoon. Marsh Creek shows up with first bluegreen report of the season, Bradley Brook Reservoir comes back on the impacted water bodies list, joining Swinging Bridge, Alcove and Basic Creek Reservoirs also confirmed with another wave of bluegreen growth over the weekend. Another wave of reports confirmed in the Finger Lakes, just four lakes account for sixty percent of the bluegreen going on New York right now. The latest impacted water body list is available here.
The latest satellite image of Lake Champlain was captured September 18, a mostly clear view of open water. HABs are visible as dispersed open water mats from Baie Missisquoi down past Alburg-Swanton bridge to the north end of North Hero Island. St Albans Bay HAB shows up as widespread up to the north shore, in each case matching color scale for concentration 600 thousand cells per ml.
See the NCCOS color image of Lake Champlain here.
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