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5/7/2024

WT Staff





HAPPENING NOW
Much above normal streamflows Long Island
NWS: Thunderstorms tonight

Water news for Tuesday, May 7, 2024 updated 211 pm EDT

National Weather Service Hazardous Weather Outlook issued 314 am EDT
Showers and embedded thunderstorms are in the forecast for tonight, but any storms are not expected to be severe. Thunderstorms Wednesday are expected to be isolated, a few may contain damaging wind gusts and hail. There is a marginal risk for severe thunderstorms.

Impacting Northern Oneida-Yates-Seneca-Southern Cayuga-Onondaga-Steuben-Schuyler-Chemung-Tompkins-Madison-Southern Oneida-Cortland-Chenango-Otsego-Tioga-Broome-Delaware-Sullivan Counties.

Current Streamflows, Drought Map from the USGS network in New York
Northeast NY streamflows toward the Atlantic Ocean via St Lawrence River and Lake Champlain are running below normal through St Lawrence County to above seasonal normal through Franklin and Clinton Counties Tuesday. Through east central state the Hudson River and tributaries are running mostly normal, above normal on Long Island. West interior flows are a mix of below normal to normal streamflows with one station recording a low flow, 1st percentile on the Seneca River near Baldwinsville. Swan River still flows high near Patchogue in Suffolk County.

Drought map shifted overnight away from moderate drought, the Upper Hudson River has stepped down to below normal rating Tuesday while the Lower Hudson watershed has been cleared from the drought map. St. Lawrence River and Black River watersheds remain below normal, along with Allegheny, Niagara - Lake Erie, Lower Genesee, Chemung and Delaware Rivers hang on the drought map at the below normal rating.


Harmful Algal Bloom HAB Monitoring satellite program of the National Center for Coastal Ocean Science (NCCOS)
New York Department of Environmental Conservation surface observation of HABs monitoring season has not yet opened as of this report. Check back here for the daily update on HABs monitoring status.

The latest satellite image uploaded from NCCOS was captured May 6 at undetermined wind speed. This image reveals a clear view to the water and shorelines of the northern two thirds of Lake Champlain. No HAB activity is visible. A prior capture dated April 26 shows dozens of localized blooms at moderate concentration 100 thousand cells per 100 ml in various locations along the east, west and island shorelines and open water of Lake Champlain. For a description of the April 26 capture, click here or click on the HABs button to the right of the map.

WT USA Flows and Flood Tracker provisional data from the network of USGS streamflow monitors
Seventy-six streamflow gauges record flooding in the USA Tuesday afternoon, up from seventy-three this morning. WT tracks the nation's most common natural disaster dynamics through the states of New York, Ohio, Georgia and Louisiana. As of this report, we are watching six active flooding events recorded on the network, all in Louisiana.

Allen Parish: Flooding ended near Kinder around 845 am CDT this morning. Calcasieu River is still overflowing the channel upstream near Glenmora, the top end of watershed Region 4. Sabine River continues to flood from the mid-channel station near Burkeville, flooding through the mid channel near Bon Wier, TX and more than two and a half feet over the channel near Ruliff, TX. Watershed Region 1 sees flooding in the northwest, Bayou Dorcheat still runs ten inches over flood stage near Springhill in Webster Parish. Bayou Bodcau continues to flood six feet four inches over the basin near Shreveport in Bossier Parish.

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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