Red Tide Current Status

FWC reports on the current status of Karenia brevis blooms using tables, static maps, and interactive Google Earth maps. Archived status maps can be found in our Flickr gallery.

Red Tide Status (May 20, 2016)

The Florida red tide organism, Karenia brevis, persists along Pinellas, Sarasota, and Charlotte counties in Southwest Florida.

Over the past week, K. brevis was observed at background concentrations in 1 sample collected from Pinellas County; very low to background concentrations in 6 samples collected from Sarasota County; and background concentrations in 3 samples collected from Charlotte County.

In addition, one sample collected from inshore waters of Brevard County (East Coast) contained background concentrations of K. brevis.

Fish kills and respiratory irritation were not reported in Southwest Florida over the past week. Forecasts for Southwest Florida by the USF-FWC Collaboration for Prediction of Red Tides show net southern, onshore movement of surface and bottom waters between Pinellas and Lee counties over the next 3 days.

Red Tide Status Map (May 20, 2016)

Southwest Coast red tide counts May 12-19, 2016

View a larger map Adobe PDF (May 20, 2016)

Regional Status Reports and Maps Adobe PDF (May 20, 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 May 20, 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.

Previous Regional Status Reports and Maps

May 13, 2016
Southwest coast report and map
East coast report and map
Northwest coast report and map
Google Earth map

May 6, 2016
Southwest coast report and map
East coast report and map
Northwest coast report and map
Google Earth map

April 29, 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



FWC Facts:
The star coral may live for several centuries and grow to the size of an automobile. Its growth rate ranges from about 1/4 inch to 3/4 inch of yearly outward expansion.

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