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WT Staff

Saturday Edition
NWS: chance of showers tonight west interior

Water news for Saturday, May 11, 2024 947 am EDT

National Weather Service Binghamton forecast office calls for a 50% chance of showers today in the interior, increasing to 60% likelihood of rain showers this evening. Showers yesterday have already had a measurable impact on the Chemung River and Susquehanna River watersheds with streamflows running above seasonal average for this date.

Current Streamflows, Drought Map from the USGS network in New York
Streamflows in the west interior have increased overnight with widespread rains in the region, presently running normal to above normal in the south interior, pushing the Upper Genesee and Chemung River watersheds clear of the drought map Saturday. Flow levels in the Lower Genesee watershed remain below normal. The Hudson River basin streamflows run normal to above normal with the west Catskill Schoharie Creek tributaries below normal. Long Island flows are normal to above normal, one station records above the 90th percentile in Nassau County. Streamflows in the St. Lawrence River watershed in the northeast remain below normal.

The drought map has cleared considerably overnight with Chemung and Upper Genesee River watersheds coming off a below normal rating. One new area is tagged Saturday, the Lake Ontario minor tributaries west section today rated below normal, adjacent the Lower Genesee River watershed, also rated below normal. A section of the Allegheny River watershed in Cattaraugus County and a section of the Niagara River - Lake Erie watershed along Lake Erie shoreline in Chautauqua County remain below normal. The entire St Lawrence River watershed remains below normal Saturday.

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

Two sites are recorded flowing above flood stage in northwest Georgia Saturday morning. A new flood event recorded yesterday afternoon in the Tennessee River west watershed, West Chickamauga Creek presently recorded three inches over the channel at GA 146 near Lakeview. In the Coosa River watershed, the Oostanula River has been flooding at Calhoun since the wee hours yesterday, on a slow upward trend that appears to have peaked a foot and a half above the channel.

Flooding ceased yesterday on Lookout Creek near New England. Coahulla Creek tucked back into the channel near Dalton around 6 pm yesterday. See the black tags for flood, blue tags for high flow 99th percentile volume updated daily here.

Louisiana posts the same five stations running above flood stage Saturday as reported the last few days. Region 4 watershed Sabine River is slowly receding, today flowing one and a half to two feet above the channel near Bon Wier, TX and downstream Ruliff, TX, respectively. To the east in Region 4 watershed, the Calcasieu River continues spreading out near Glenmora, running more than a foot outside the channel near Glenmora at 2160 cubic feet per second. To the north, Region 1 watershed's Bayou Dorcheat is slowly receding, down two inches overnight to run a foot and seven inches out of the channel near Springhill. Bayou Bodcau has dropped an inch or two overnight near Shreveport, still five feet above the basin. 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 10 at undetermined wind speed. This image is partially cloud obscured. 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.

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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