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WT Staff

Sunday Edition

Water news for Sunday, May 12, 2024 949 am EDT

Current Streamflows, Drought Map from the USGS network in New York
Streamflows in the west interior run similar to Saturday, below normal to above normal, with the slower flows located in the Lower Genesee and Lake Ontario minor tributaries west section, the highest flows centered in the Chemung River watershed. Northeast state flows run below normal in St. Lawrence River watershed; a mix of below normal and normal rated streamflows through the Lake Champlain watershed. Streamflows in the upper basin register much below normal Sunday sufficient that the lower channel has slowed from yesterday, currently rated at seasonal normal. One station records much below normal flow in the Schoharie Creek drainage area of the west Catskills. Long Island flows run normal Sunday with one station recording much below normal, Swan River station at East Patchogue. This station was the one recording much above seasonal normal the last two weeks, it is possible the gauge is malfunctioning.

The drought map has regained area in the Upper Hudson River watershed in parts Essex, Hamilton and Warren Counties rated below normal. Adjacent area of the St Lawrence River watershed remains below normal Sunday. Lake Ontario minor tributaries west section, Lower Genesee and Allegheny River watersheds remain below normal. A portion of the Niagara River - Lake Erie watershed along Lake Erie shoreline in Chautauqua County remains below normal. There are no extreme low flows registering in the network on Sunday morning.

WT USA Flows and Flood Tracker provisional data from the network of USGS streamflow monitors
Fifty-seven streamflow gauges record flooding in the USA Sunday morning, down from seventy Saturday. WT tracks the nation's most common natural disaster dynamics through the states of New York, Ohio, Georgia and Louisiana. As of this report, five sites record flooding on the network, all in Louisiana.

Two sites flooding yesterday in northwest Georgia have subsided since the Saturday report. West Chickamauga Creek was recorded three inches over the channel at GA 146 near Lakeview at the time of the Saturday report, the flooding ended around 930 am. In the Coosa River watershed, the Oostanula River receded back into the channel at Calhoun around 830 am this morning. Coosawattee River records 99th percentile flow near Pine Chapel and Carters with a level volume trend.

See the blue tags for high flow 99th percentile volume updated daily here.

Louisiana posts the same five stations running above flood stage Sunday as reported the past week. Region 4 watershed Sabine River continues to recede, down more than half a foot overnight, currently running nine inches above flood stage near Bon Wier, TX. Water level at downstream station near Ruliff, TX is also down overnight, currently running a foot and ten inches over the channel. Calcasieu River runs less than a foot above flood stage Sunday morning, on a declining trend. In Region 1, Bayou Dorcheat continues on a declining flow trend, flowing a foot and two inches above the channel near Springhill. Bayou Bodcau dropped half a foot overnight, running four and a half feet above the channel near Shreveport. See black tags on the map here.

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 of Lake Champlain uploaded from NCCOS was captured May 11 at undetermined wind speed. This image is completely clear with no HAB activity noted. For a description HABs captured in prior images, click 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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