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WT Staff

Sunday, June 16, 2024
Lower flows Sunday, heat wave coming

June 16, 2024 1105 am EDT

Heat wave coming Tuesday Hazardous weather outlook issued 327 am June 16 from National Weather Service forecast center in New York

The first heat wave of the season will likely start on Tuesday, peak Thursday and may last through Saturday. Peak heat index values of 100 to around 105 are possible.

Impacting Northern Fairfield-Northern New Haven-Northern Middlesex-Northern New London-Southern Fairfield-Western Passaic-Eastern Passaic-Hudson-Western Bergen-Eastern Bergen-Western Essex- Eastern Essex-Western Union-Eastern Union-Orange-Putnam-Rockland-Northern Westchester-Southern Westchester-New York (Manhattan)-Bronx-Richmond (Staten Island)-Kings (Brooklyn)-Northern Queens Counties

Heat wave coming upstate Hazardous weather outlook issued 327 am June 16 from National Weather Service forecast center in Binghamton
Confidence in an extended period of hot and humid conditions next week continues to increase. The heat index will climb into the 90s Monday through at least Friday during the daytime with the hottest days expected to be Tuesday through Thursday. Not only will we have to deal with oppressive daytime heat, but the lows during the overnight hours will stay in the 70s, extremely limiting any relieve we normally get at night and greatly increasing the heat related impacts felt across the region.

Current Streamflow Situation
Below normal values are sprouting up through the interior Sunday, watch for this drying trend to increase the stress on the aquatic environments of NYS through the coming heat wave. Low water levels combined with higher temperatures concentrate the contaminants and nutrients in the waterways, leading to increased HAB activity and lower dissolved oxygen levels. Watch for new HAB reports through the coming week. The highest streamflows Sunday are a single rating much above normal, 95th percentile at Cold Spring Harbor Long Island. Above normal rating 85th percentile is the next highest flow, this is down from yesterday in the Black River watershed. The lowest streamflows Sunday include an extreme low 1st percentile measured on Hudson River at Green Island, 2nd percentile in Niagara River - Lake Erie watershed and the same station at 1st percentile at East Patchogue on Long Island. The drought map is unchanged overnight, Raquette River channel through St. Lawrence River watershed remains below normal, northeast Essex and Dutchess Counties are still below normal in the lower Hudson River watershed. As of this report, there are no floods observed in the NYS network of streamflow monitors and no extreme high flows.

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

Thirty streamflow gauges record flows above flood stage through the US monitoring network Sunday, up from twenty-nine yesterday. WT USA follows the water levels and volume on four of these reference flood events, and all four occurring in the state of Louisiana.

Louisiana: West state border Sabine River got back out of the channel around 9pm Saturday night near Logansport, currently recorded half a foot over minor flood stage running 22600 cubic feet per second. The volume downstream near Bon Wier is 31000 cfs and nine inches over minor flood stage on a steady receding trend. Closer to the Gulf outlet near Ruliff the water level is still more than two feet above the channel and 41600 cfs. Region 1 Bayou Bodcau Lake continues to recede slowly, down another three inches over the last twenty-four hours, currently recorded three and a half feet above the basin near Shreveport. For more info on the flooding in Louisiana, see black tags indicating flood flow volume and gauge height 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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