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NOAA Harmful Algal Bloom Operational Forecast System (HAB-OFS)

Operational Conditions Reports

HAB-OFS Products:
Public Conditions Reports by Region (including Impact Forecasts):

Operational Conditions Reports
Southwest Florida Forecast Region Maps
Friday, March 24, 2017

Not present to 'medium' concentrations of Karenia brevis
(commonly known as Florida red tide) are present along- and
offshore portions of southwest Florida, and not present in
the Florida Keys. K. brevis concentrations are patchy in
nature and levels of respiratory irritation will vary
locally based upon nearby bloom concentrations, ocean
currents, and wind speed and direction. The highest level
of potential respiratory irritation forecast for Friday,
March 24 through Monday, March 27 is listed below.

County Region: Forecast (Duration)
Southern Manatee: Very Low (F-M)
Southern Manatee, bay regions: Low (F-M)
Northern Sarasota: Very Low (F), Low (Sa-M)
Northern Sarasota, bay regions: Low (F-M)
Southern Sarasota: Very Low (F), Low (Sa-M)
Northern Charlotte: Very Low (F), Low (Sa-M)
Northern Charlotte, bay regions: Moderate (F-M)
Southern Charlotte: Very Low (F), Low (Sa-M)
Southern Charlotte, bay regions: Low (F-M)
Northern Lee: Very Low (F), Low (Sa-M)
Northern Lee, bay regions: Low (F-M)
Central Lee: Very Low (F), Low (Sa-M)
Central Lee, bay regions: Very Low (F-M)
All Other SWFL County Regions: None expected (F-M)

for recent, local observations, including Mote Marine
Laboratorys Beach Conditions Report. Health information,
from the Florida Department of Health and other agencies,
is available at
Over the past several days, reports of dead fish were
received from Sarasota and Lee counties.
Northwest Florida to Louisiana Forecast Region Maps
Saturday, March 25, 2017

There are currently no reports of harmful algae in this region. 
No impacts are expected.

Last report: Monday, October 31, 2016
East Florida
Saturday, March 25, 2017

There are currently no reports of harmful algae in this region. 
No impacts are expected.

Last report: Monday, August 01, 2016
Texas Forecast Region Maps
Monday, March 20, 2017

Karenia brevis (commonly known as Texas red tide) ranges
from not present to very low concentrations along the coast
of Texas. No respiratory irritation is expected Monday,
March 20 through Monday, March 27.

for recent, local observations.

About the NOAA HAB-OFS Conditions Report

Harmful algal blooms of Karenia brevis, the organism responsible for red tide in the Gulf of Mexico, can impact the health of humans and animal life. The blooms are patchy in nature and the impacts vary by location and throughout the day depending on nearby bloom concentrations, ocean currents, surf conditions, and wind speed and direction. The NOAA HAB-OFS Conditions Report identifies whether or not there are K. brevis cell concentrations. When K. brevis cell concentrations are present, the report indicates the general location and provides forecasts of the highest potential level of associated respiratory irritation as described here. The Conditions Reports are based on the analysis of information from HAB-OFS Contributors & Data Providers.

Health Info, HAB Observations, and other Data Resources

The Local Beach Conditions page provides a list of sources for up-to-date information about the observed, local beach conditions in Florida and Texas. During a K. brevis bloom, the Conditions Report and resources on the Local Beach Conditions page may help you find an unaffected beach nearby. For health information and resources, see the Health Information page.

Additional bloom analysis is included in the HAB Bulletin, which is emailed to a list of subscribers who have natural resource management responsibilities and are involved in HAB event response. To view archived HAB Bulletins or learn more about them and how to subscribe, visit the Bulletin page.

Other Sources of Gulf of Mexico HAB Status Info:

Check our Local Beach Conditions page.

View map of cell counts and environmental data.

Click to go to the NOAA HABs Observing System

Health Questions about Red Tide?

Visit Our HAB Health Information Page

For 24/7 medical advice about the health impacts of red tide, call your local Poison Control Center (1-800-222-1222).


Revised: 10/15/2013
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services