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6/4/2024

WT Staff

HAPPENING NOW
Tuesday, June 4, 2024
Niagara County drops into moderate drought


June 4, 2024 updated 324 pm EDT

Current Streamflows from the network of USGS river monitors in NYS
Much below seasonal streamflows continue overnight upstate, east and north. Below normal is the more common rating statewide Tuesday with normal flows registering in the south Chemung River and Delaware River watersheds. The same three stations run at record low levels for the calendar date. Raquette River hit an extreme low flow for a period overnight, flow has since picked up to the much below normal rating common through the interior. See the red-brown tags on the map to the right.

Drought Map
Lake Ontario minor tributaries west section in Niagara County provisionally records a running 7-day average streamflow consistent with moderate hydrologic drought rating Tuesday. The Upper Hudson River watershed is cleared from drought map Tuesday, leaving only the St Lawrence River watershed on at below normal rating in all of the north state. In the southwest, Allegheny River watershed is rated below normal through central Chautauqua County again today, along with interior Oswego River-Finger Lakes watershed. Follow how ongoing dry conditions in these watersheds may contribute to HABs forming in Chautauqua Lake and the Finger Lakes. No HABs are reported here yet, more to follow.

HABs Tracker
from National Centers for Coastal Ocean Science satellite monitoring program
from NYS Department of Environmental Conservation HAB Notifications

Eight HAB reports are confirmed on seven NY water bodies as of this update. Cayuga Lake is the first of the Finger Lakes to show a HAB in the 2024 season, two reports submitted yesterday have been confirmed in the north end off the west shore, off Pumphouse Rd and off Cayuga Lake State Park. A new HAB has been confirmed in Toronto Reservoir in Sullivan County, Delaware River watershed. Another HAB has been confirmed in the north end of Lake Casse, Putnam County in the Lower Hudson River watershed. Active HABs are tagged in bluegreen on the map to the right. Plan your beach time for clear access to the water, avoid contact with HAB mats. If you spot a suspicious algal bloom, which may appear as spilled paint in the water, use the on-line form here.

NCCOS uploads new satellite photos of Lake Champlain on a near-daily basis. The latest image was captured June 3 at unknown surface wind speed. This is a nice clear image with a view to the open water, shorelines and islands of Lake Champlain. No HAB activity is observed in this image. Note that low or moderate blooms are not always visible in the imaging and high wind speed can submerge any HAB mats present. HABs were last documented on April 26 in Lake Champlain, see the HAB Tracker report here for a description of the locations, extent and concentration of those HABs.


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

Fifty-five streamflow gauges indicate flow above flood stage in the USA Tuesday afternoon, up from fifty- two this morning. Louisiana is under a flash flood warning this afternoon with six monitoring stations reporting active flooding.

As northwest Louisiana remains under Flood Watch until tomorrow evening, rounds of thunderstorms and locally heavy rains have inundated the northwest giving rise to the flash flood warning issued 1130 am today. As of this update, Bayou Bodcau Lake has overrun the basin near Shreveport again, flood stage breached around noon on a rapid rising flow trend. The same five stations reported flooding this morning and three non-rated sites indicating extreme high flows are unchanged at this time. Bayou Dorcheat continues flooding near Springhill in watershed Region 1. Watershed Region 4 Sabine River is flooding near Logansport and Ruliff, TX. Calcasieu River is flooding near Glenmora and downstream near Oberlin. See black tags indicating flood flow volume and gauge height, blue tags for 99th percentile 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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