6/15/2024
WT Staff
 HAPPENING NOW
Saturday, June 15, 2024
High concentration HAB expands in Sandusky Bay
June 15, 2024 1108 am EDT
HABS Tracker satellite monitoring by the National Centers for Coastal Ocean Science (NCCOS)
A new sat image for Lake Erie captured June 14 at 7.7 mph shows the Sandusky Bay high expanding to touch the north shore around Danbury, also now seen spilling into the outer bay area past route 269. The concentration appears slightly lower in this image, running 1 million cells per 100 ml to a peak concentration 1.2 or 1.3 million on the south edge of the mass near Lagoon Deer Park. The Sandusky Bay HAB was first seen on the south shore from Bayview to Willow Point Wildlife Area on Tuesday June 11. This HAB matched the concentration color scale for a count of 1.5 million cells per 100 ml sample. the latest raw water test results posted for Sandusky City have total microcystins below minimum reporting level as of June 8. More to follow as the HAB grows in the direction of the Sandusky raw water intake and new labs are posted.
Hazardous Weather Outlook issued 308 am June 15 by NWS Cleveland forecast center
There is growing confidence in a heat wave developing Sunday through the middle of next week. Heat indices will likely approach 100 degrees beginning on Monday.
Impacting Lorain-Cuyahoga-Lake-Geauga-Ashtabula Inland-Huron-Medina-Summit-Portage-Trumbull-Wyandot-Crawford-Richland-Ashland-Wayne-Stark-Mahoning-Marion-Morrow-Holmes-Knox-Ashtabula Lakeshore-Northern Erie-Southern Erie Counties.
Streamflow Situation
from the USGS network of streamflow gauges in Ohio
A downward streamflow trend this week has placed Ohio with an even mix of normal and below normal values for the weekend. The below normal ratings apply on both sides of the state divide, the highest flow now seen in a normal rating above 60th percentile in the Mahoning River watershed. The normal-rated water bodies are in the low end of the normal range as a heat dome approaches. The lowest flow recorded Saturday before noon is 3rd percentile on the Cuyahoga River near the Lake Erie outlet end. The drought map tells the state water story today with new candidate watersheds appearing, below normal ratings applied Saturday on both sides of the divide. Ohio River minor tributaries Little Beaver Creek and Wheeling watersheds join Raccoon-Symmes watershed and Muskingum River basin's Wills Creek watershed, all rated below normal. In the Lake Erie basin, Ashtabula-Chagrin watershed has been tagged with a below normal rating, joining Upper Wabash watershed in Mercer County, still below normal as reported here yesterday.
WT USA Flood Tracker provisional data from the network of USGS streamflow monitors
Twenty-nine streamflow gauges record flows above flood stage through the US monitoring network Saturday, down from thirty-two yesterday. WT USA follows the water levels and volume on three of these reference flood events now, and all three pertain to the state of Louisiana.
Louisiana: Sabine River flooding continues, down two feet overnight near Bon Wier, still two and a half feet above flood stage, overflowing about the same measure above flood stage near Ruliff. Region 1 Bayou Bodcau Lake is settling down slowly, down three inches overnight, presently three feet nine inches over 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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