Red Tide Report (Update)

Posted by on Thursday Sep 13, 2018 9:01 am

Red Tide Mid-week Update for September 12, 2018

Current Conditions
A bloom of the Florida red tide organism, Karenia brevis, persists in Southwest Florida and extends from northern Pinellas to Lee counties along ~125 miles of coastline. Aerial surveys conducted on 9/6 and 9/11 as well as recent water sampling indicate that the bloom of K. brevis still extends offshore (10 miles or more) in some areas. A bloom of K. brevis was also observed in Northwest Florida for the first time this past week.

Observations of >1,000,000 K. brevis cells per liter (“high” concentrations) occurred in samples collected in or offshore of Pinellas, Manatee, Sarasota, Charlotte, and Lee counties and relative to last week, multiple locations in Pinellas, Sarasota, Charlotte and Lee counties showed increased K. brevis concentrations. Decreased cell concentrations were observed in Collier County. In Northwest Florida, very low to low cell concentrations (<100,000 cells per liter) were reported from Okaloosa to Bay counties.

In Southwest Florida, reports of fish kills were received for multiple locations in and/or offshore of Pinellas, Manatee, Sarasota, and Lee counties. In Northwest Florida, reports of fish kills were received in and offshore of Panama City Beach (Bay County). Respiratory irritation was reported in Southwest Florida (in Pinellas, Manatee, Sarasota, and Lee counties).

Forecasts by the USF-FWC Collaboration for Prediction of Red Tides for Pinellas to northern Monroe counties predict net southern movement of surface waters for most areas and net southeastern transport of subsurface waters over the next three days. Forecasts for Northwest Florida predict net eastern transport of surface and subsurface waters.

The next complete red tide status report will be posted on Friday, September 14^th.

Red Tide Status Map (September 12, 2018)
View a larger map  (September 12, 2018)

 Red Tide Status Update for September 7, 2018

Current Conditions
A bloom of the Florida red tide organism, Karenia brevis, persists in Southwest Florida and extends from Pinellas to northern Collier counties along ~120 miles of coastline. Observations of >1,000,000 K. brevis cells per liter (“high” concentrations) occurred in samples collected in or offshore of Sarasota, Charlotte, and Lee counties only. Relative to last week, multiple locations in Sarasota and Collier counties showed decreased cell concentrations. An aerial survey conducted on 9/6 as well as recent water sampling and chlorophyll satellite imagery indicate that the bloom of K. brevis likely extends offshore (10 miles or more) in some areas of the bloom region. Patchy accumulations of the marine cyanobacterium Trichodesmium were also observed ~10 miles offshore of Manatee and Sarasota counties. Persistent surface currents—prior to, during, and after the passage of Tropical Storm Gordon—likely played a role in transporting cells of K. brevis to the northwest. More specific details are provided below.

• In Southwest Florida over the past week, K. brevis was observed at background to medium concentrations in or offshore of Pinellas County, background to medium concentrations in Manatee County, background to high concentrations in Sarasota County, very low to high concentrations in or offshore of Charlotte County, background to high concentrations in or offshore of Lee County, and medium concentrations in Collier County. For additional information, view the southwest coast report  and map . 
  
  
• In Northwest Florida over the past week, K. brevis was observed at very low concentrations in one sample collected from Bay County. For additional information, view the Northwest Coast report  and map .
  
  
• Samples collected along the east coast of Florida over the past week did not contain K. brevis. For additional information, view the East Coast report  and map .

Fish Kills
Over the past week, reports were received for multiple locations in Pinellas, Manatee, Sarasota, and Lee counties. More detailed information is available at /fishkill.

Respiratory Irritation
Respiratory irritation was reported over the past week in Manatee, Sarasota, and Lee counties. For additional information, view the Southwest Coast report . 

Forecast
Forecasts by the USF-FWC Collaboration for Prediction of Red Tides for Pinellas to northern Monroe counties predict net northwestern movement of surface waters for most areas and net southeastern transport of subsurface waters over the next three days. A change from northwestern to southeastern surface transport is predicted to occur towards the end of this period.  

Red Tide Status Map (September 7, 2018)

View a larger map  (September 7, 2018)

To see detailed information on this week's samples, view the current Statewide Google Earth map for September 7, 2018. 

By using Google Earth, you can zoom in to specific locations and click on stations to see detailed information, including sample date and cell concentration. You must have Google Earth installed on your computer to view this map; the software can be downloaded from the Google Earth website. 

Archived status maps can be found in our Flickr gallery.

Latest Red Tide Status Report Available by Phone
Call 866-300-9399 at any time from anywhere in Florida to hear a recording about red tide conditions throughout the state. Callers outside of Florida can dial 727-552-2448. Standard calling charges apply.

Reports are updated on Friday afternoon except during holidays, in which case the report will be released on the closest day. Additional information, if available, is provided on Wednesday afternoon. To receive an e-mail when the current status has been updated, visit our subscription area.

Additional Information
For additional information about red tide and the current red tide bloom, including information on how to report a fish kill or other wildlife effects, consult health authorities about human exposure, or locate other resources, visit our Red Tide-Related Hotlines and Information Sources article.

Blue-Green Algae Bloom Information

Additional information regarding the current status of algal blooms in South Florida is being consolidated and posted on the Florida Department of Environmental Protection’s website: https://floridadep.gov/dear/algal-bloom.

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Tags:   boat safety  boating safety  Bradenton Boat Club  Florida boating  Red tide  Sarasota & Bradenton Boating  Sarasota Boat Club  Stump Pass  Venice

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