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Red Tide Current Status

Daily Sample Map
This map contains the last eight days of sampling and is updated daily at 5 p.m.
Please be sure to click on individual dots for sampling details.

Red Tide Status Update for December 13, 2019

Current Conditions

A patchy bloom of the red tide organism, Karenia brevis, persists in Southwest Florida. Additional details are provided below.

  • In Southwest Florida over the past week, K. brevis was observed at background to medium concentrations in Charlotte County, background to medium concentrations in and/or offshore of Lee and Collier counties, and background concentrations offshore of Monroe County. Bloom concentrations (>100,000 K. brevis cells per liter) were observed at two estuarine sites in Charlotte and Lee counties and at three coastal and offshore sites in Collier County. For additional information, view the Southwest Coast report and map.
  • In Northwest Florida over the past week, K. brevis was not observed. For additional information, view the Northwest Coast report and map.
  • Along the Florida East Coast over the past week, K. brevis was not observed. For additional information, view the East Coast report and map.

Fish Kills

In Southwest Florida over the past week, fish kill reports were received for Charlotte County (please see https://myfwc.com/research/saltwater/health/fish-kills-hotline).

Respiratory Irritation

Respiratory irritation was reported over the past week in Southwest Florida in Charlotte, Lee, and Collier counties. Additional details are provided in the Southwest Coast report.

Forecast

Forecasts by the USF-FWC Collaboration for Prediction of Red Tides for Sarasota to northern Monroe counties predict variable movement of surface waters and minimal net movement of subsurface waters in most areas over the next four days.

Red Tide Status Map (December 13, 2019)

Statewide Red Tide Counts December 5 through 12, 2019

View a larger map (December 13, 2019).

To see detailed information on this week's samples, view the current Statewide Google Earth map for December 13th, 2019.

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

A midweek status update will be issued on Wednesday, December 18th and the next complete status report will be issued on Friday, December 20th. Please check our daily sampling map which can be accessed from the top of this page.

Archived status maps can be found in our Flickr galleryPrevious regional status reports and maps can be found on our red tide resources page.

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 727-502-4952. 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.

Key for Results

Description K. brevis abundance Possible effects (K. brevis only)
NOT PRESENT- BACKGROUND background levels of 1,000 cells or less no effects anticipated
VERY LOW > 1,000 - 10,000 cells/L possible respiratory irritation; shellfish harvesting closures when cell abundance equals or exceeds 5,000 cells/L
LOW > 10,000 - 100,000 cells/L respiratory irritation; shellfish harvesting closures; possible fish kills; probable detection of chlorophyll by satellites at upper range of cell abundance
MEDIUM > 100,000 - 1,000,000 cells/L respiratory irritation; shellfish harvesting closures; probable fish kills; detection of surface chlorophyll by satellites
HIGH > 1,000,000 cells/L as above, plus water discoloration