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Red Tide Current Status

Red Tide Status (December 2, 2016)

A bloom of the Florida red tide organism, Karenia brevis, persists in Southwest Florida from southern Pinellas to Lee County, with patches observed in Collier and northern Monroe counties.

Over the past week, Karenia brevis was observed in very low to low concentrations in four samples collected from Pinellas County; low to medium concentrations in thirteen samples collected from Manatee County; low to high concentrations in twenty-four samples collected from Sarasota County; very low to high concentrations in two samples collected from Charlotte County; background to medium concentrations in ten samples collected from Lee County; background to low concentrations in two samples collected from Collier County; and very low concentrations in one sample collected from Monroe County. 

Additional samples collected throughout Florida over the past week did not contain K. brevis.

Fish kills affecting multiple species have been reported along Pinellas, Charlotte, Lee, and Collier counties over the past week. Respiratory irritation has also been reported in some areas of Sarasota and Lee counties.  Forecasts for Southwest Florida by the USF-FWC Collaboration for Prediction of Red Tides show net offshore, southern movement of surface waters, and onshore, southern movement of subsurface waters between southern Pinellas and northern Monroe counties over the next 3 days.

View a larger map Adobe PDF (December 2, 2016)

Regional Status Reports and Maps Adobe PDF (December 2, 2016)

Southwest coast report and map
East coast report and map
Northwest coast report and map

To see detailed information on this week's samples, view the current Statewide Google Earth map for December 2, 2016.

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. External Website

The FWRI Red Tide Status Line is now available to callers throughout the state. FWRI updates the recording each Friday by 5 p.m. Red Tide Status Line: 866-300-9399 (toll-free inside Florida only); 727-552-2448 (outside Florida).

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.

FWC's Red Tide Action Report

Red tide is a naturally-occurring microscopic alga that has been documented along Florida’s Gulf Coast since the 1840’s and occurs nearly every year. Blooms, or higher-than-normal concentrations, of the Florida red tide alga, Karenia brevis, frequently occur in the Gulf of Mexico at this time of year (late summer or early fall). Red tide begins in the Gulf of Mexico 10 to 40 miles offshore and can be transported inshore by winds and currents.

FWC Actions and Partnerships:

Red Tide Resources

Previous Regional Status Reports and Maps

November 23, 2016
Southwest coast report and map
East coast report and map
Northwest coast report and map
Google earth map

November 18, 2016
Southwest coast report and map
East coast report and map
Northwest coast report and map
Google Earth map

November 10, 2016
Southwest coast report and map
East coast report and map
Northwest coast report and map
Google Earth map

November 4, 2016
Southwest coast report and map
East coast report and map
Northwest coast report and map
Google Earth map

Additional archived status maps can be found on Flickr

Key for Results

Description Karenia brevis cells/liter Possible Effects (K. brevis only)
NOT PRESENT - BACKGROUND background levels of 1,000 cells or less None anticipated
VERY LOW >1,000 to 10,000 Possible respiratory irritation; shellfish harvesting closures >  5,000 cells/L
LOW >10,000 to 100,000 Respiratory irritation, possible fish kills and bloom chlorophyll probably detected by satellites at upper limits
MEDIUM >100,000 to 1,000,000 Respiratory irritation and probable fish kills
HIGH >1,000,000

As above plus discoloration


Hotlines and Information Sources

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