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5/24/2024

WT Staff

HAPPENING NOW
Friday, May 24, 2024
>NY DEC HAB Monitoring season opens

May 24, 2024 928 am EDT
updated 219 pm

HAB Tracker
NY Department of Environmental Conservation has opened the 2024 HAB reporting season. HAB reports from the public, from state and county departments, from the Citizens Statewide Lake Assessment Program will be accepted, assessed and posted on the NY DEC HAB Notification site. WTNY brings the confirmed active HAB reports to our coverage of water matters here. More to follow.

National Centers for Coastal Ocean Science have added a monitoring program for Lake Champlain, providing a daily satellite image of cyanabacteria markers showing the presence, extent and concentration of HAB under relatively calm conditions. When the wind is above 4 mph, the HAB can evade detection by imaging and ground observation as it can become submerged and mixed down the water column. NCCOS provides a color scale for interpretation of HAB concentration. WTNY receives the satellite images and provides a daily interpretation of the locations of HAB activity and an estimate of the extent and concentration based on the color scale. See the HAB Tracker report below for more information.

Current Streamflow Situation - NYS Drought Map
Four stations are recording extreme low flow volume Friday. Niagara River - Lake Erie watershed has a 2nd percentile flow level. Another low flow value shows up in the Chemung River watershed on Canisteo River at Arkport, a third is recorded in the St. Lawrence River watershed on the Raquette River. Swan River continues to flow low at East Patochgue. Statewide flows trend toward below normal and much below normal flow. Normal flows are most prevalent in south and up in the Lake Champlain watershed. Severe drought remains over the Raquette River channel, moderate drought holds the Oswegatchie River channel and below normal rating applies throughout the remaining surface area of St. Lawrence River watershed, Black River, Lake Ontario minor tributaries east section and Upper Hudson River watersheds. West interior Finger Lakes watershed remains below normal from south Wayne County, Cayuga, Onondaga, Yates, Schuyler and north Steuben Counties. Below normal rating is applied to a larger part of the Niagara River - Lake Erie watershed in the south, extending to north Chautauqua County.

The highest streamflow ratings recorded in NYS 85th to 87th percentile, recorded on the north side of Long Island in Nassau County. One station recording 80th percentile in the Delaware River watershed. There are no active flood events or extreme high flows in the network Friday.

WT USA Flows and Flood Tracker provisional data from the network of USGS streamflow monitors

As of this update, forty-two sites record flooding on the national USGS network, up from forty-one this morning. Nine floodings are actively occurring in the WT coverage area, four in Georgia, and five in Louisiana.

Georgia: Satilla River flooding has ended near Waycross, the provisional data shows this flood ended early this morning. Satilla continues to overflow the channel downstream at Atkinson, running two feet over as of this update. Little Satilla River is still recording a flood event near Offerman, down to half a foot of flood flow and receding. Gulf of Mexico basin's Ochlockonee River tucked back down into the channel around 730 this morning. Withlachoochee River curtailed flooding around the same time at Skipper Rd near Bemiss. The Withlacoochee River overflow continues at US84 near Quitman and downstream near Pinetta, FL. See black tags indicating flow volume and gauge height, updated daily on the map to the right.

Louisiana is down to five sites in the USGS monitor network recording active flooding overnight. Calcasieu River is no longer flooding near Kinder, the flooding does continue on in the upper channel currently recorded a foot over the channel near Glenmora. Pearl River is no longer flooding near Bogalusa. In Region 1 watershed, Bayou Bodcau continues to run a foot and three inches over the channel. Region 4 Sabine River flooding continues in the lower end of the channel near Ruliff, TX. Region 5 watershed Mermentau River continues to overflow the channel at Mermentau, three inches over as of this report. In Region 7, Pearl River flooding continues at the Town of Pearl River. See black tags indicating flow volume and gauge height, flows updated daily here.

As many drinking water facilities are supplied from surface water reservoirs, the streamflow situation is pertinent to both drinking water supply and quality. High flows can stir up sediment and cause turbidity in the reservoirs, requiring additional treatments to render the water potable. Low flow volume is linked to warmer temperatures in the reservoir and can be an issue for water quality where HABs are present. WT tracks streamflow trends with an eye to the impacts on drinking water supply and quality in each of the state's watersheds. Check the watershed layer on the map to see the direction of flow and streamflows that may be impacting drinking water today.

USGS Provisional Data Statement
Data are provisional and subject to revision until they have been thoroughly reviewed and received final approval. Current condition data relayed by satellite or other telemetry are automatically screened to not display improbable values until they can be verified.
Provisional data may be inaccurate due to instrument malfunctions or physical changes at the measurement site. Subsequent review based on field inspections and measurements may result in significant revisions to the data.
Data users are cautioned to consider carefully the provisional nature of the information before using it for decisions that concern personal or public safety or the conduct of business that involves substantial monetary or operational consequences. Information concerning the accuracy and appropriate uses of these data or concerning other hydrologic data may be obtained from the USGS.









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