NOUS41 KWBC 281904 AAA

PNSWSH

 

Service Change Notice 13-11 Amended

National Weather Service Headquarters Washington, DC

205 PM EST Thu Feb 28 2013

 

To:       Subscribers:

          -Family of Services

          -NOAA Weather Wire Service

          -Emergency Managers Weather Information Network

          -NOAAPORT

          Other NWS Partners, Users and Employees

 

From:     Mark Tew

          Chief, Marine and Coastal Services Branch

          NOAA’s National Weather Service

 

          Peter Stone

          Chief, Oceanographic Division

          Center for Operational Oceanographic Products and

          Services (CO-OPS)

          NOAA's National Ocean Service

 

Subject:  Amended: Change in Issuance Criteria for Beach

          Hazards Statements for Harmful Algal Bloom (HAB)

          Issued by WFO Tampa Bay Area, Effective Immediately

 

Refer to: SCN 13-11, issued January 31, 2013, subject: Beach Hazards  

Statements issued by WFO Tampa Bay Area to include information about

harmful algal blooms (HAB) when appropriate, effective February 4, 2013

 

This notice is amended to:

 

1. Change the issuance criteria for Beach Hazards Statements

issued by WFO Tampa Bay Area for harmful algal blooms. 

Specifically, the third criteria listed below has changed: Beach

Hazards Statements for HAB will now be issued by WFO Tampa Bay

only when National Ocean Services’ (NOS’) HAB-OFS team forecasts

high respiratory impacts are possible in the WFO Tampa Bay Area’s

area of responsibility.  Previously, the criteria included

moderate respiratory impacts as well as high respiratory impacts.

 

2. Correct the e-mail address for the point of contact

 

3. Update associated information online, including a new example

based on the new criteria, posted to:

 

http://www.nws.noaa.gov/os/notification/resources/bhs-tbw.pdf

 

Effective immediately, harmful algal bloom information provided

by NOAA’s National Ocean Service’s HAB-Operational Forecast

System (HAB-OFS), which meets the criteria shown below, will be

included in the Beach Hazards Statement being tested by WFO Tampa

Bay Area. NOAA's HAB-OFS provides information on the location,

extent, and the potential for development or movement of harmful

algal blooms in the Gulf of Mexico.

 

An NWS Beach Hazards Statement will be issued by WFO Tampa Bay

Area for its area of responsibility for a HAB of Karenia brevis

(commonly known as Florida Red Tide) if all of the following

criteria apply:

 

- NOS HAB-OFS team has issued a HAB-OFS public conditions

  report or update.

 

- Karenia brevis concentrations which correlate to respiratory

  impacts (between low b and high (>50,000 cells/L)) have been

  confirmed by in-situ cell counts in WFO Tampa Bay Area’s area

  of responsibility.

 

- NOS HAB-OFS team forecasts high respiratory impacts are      

  possible in the WFO Tampa Bay Area’s area of responsibility.

 

If the level of forecasted respiratory impacts decreases, WFO

Tampa Bay Area will cancel the Beach Hazards Statement for HAB.

 

An updated example of the Tampa Bay Area Beach Hazards Statement

containing harmful algal bloom information, based on the new

criteria, and a graphic showing WFO Tampa Bay Area’s area of

responsibility is online at:

 

http://www.nws.noaa.gov/os/notification/resources/bhs-tbw.pdf

 

Routine HAB bulletins prepared by NOS HAB-OFS are issued to

coastal managers once a week, at a minimum, or twice a week

during an active bloom. For more information about HAB-OFS and

the services they provide, refer to: 

 

http://tidesandcurrents.noaa.gov/hab/

 

The Beach Hazards Statement is issued under the NWS Coastal

Hazard Message (CFW) with a Valid Time Event Code (VTEC) of BH.S. 

The Beach Hazards Statement is being tested by six WFOs, but only

the Beach Hazards Statement issued by WFO Tampa Bay Area will

incorporate HAB content, when criteria are met, at this time.

 

Table 1:  Communication identifier for the CFW issued by the

WFO Tampa Bay Area for Beach Hazards (BH.S):

 

Issuing WFO                  WMO Header         AWIPS Id

-----------                  -----------        --------

Tampa Bay Area, FL           WHUS42 KTBW        CFWTBW

 

In addition to HAB impacts, the Beach Hazards Statement issued by

WFO Tampa Bay Area, with the headline of "Beach Hazards Statement

in effect for [timeframe]" will also inform beachgoers and local

authorities of a multitude of hazards including, but not 

limited to:

 

 - Rip currents or other dangerous currents in the surf zone

 - Unusually cold water temperatures

 - Potential for lightning along the beach/shoreline

 - High heat indices that do not meet advisory criteria

 - Unusual surf/wave conditions not meeting advisory criteria

 

WFO Tampa Bay Area will coordinate with NOS’ HAB analysts in the

HAB-OFS program concerning harmful algal blooms and potential

health impacts on coastal areas. The HAB analysts will provide

necessary information to include in the Beach Hazards

Statement issued by WFO Tampa Bay Area for its area of

responsibility. The HAB information will originate from

operational HAB forecast bulletins generated by NOS’ HAB-OFS

analysts in the NOS’ Center for Operational Oceanographic and

Products and Services (CO-OPS). An NOS HAB-OFS point of contact

for additional information will be included in all Beach Hazards

Statements with HAB information.

    

The Beach Hazards Statement is intended to provide information

for the hazards listed above in a single product. Those hazards

will not necessarily be included in the Beach Hazards Statements

issued by all NWS coastal offices taking part in this test. Each

office has unique criteria for its area of responsibility and

will tailor the contents of the Beach Hazards Statement as

appropriate. For example, only WFO Tampa Bay Area is testing the

inclusion of HAB information in its Beach Hazards Statement.

 

The BH.S VTEC code is operational, i.e., the VTEC line carries

the (O) identifier. When in effect, the Beach Hazard information

issued by WFO Tampa Bay Area and the other five test offices is

highlighted in turquoise on the NWS Watch, Warning, Advisory map:

 

http://www.weather.gov

 

Users interested in the Beach Hazards Statement, who have not

already installed the code, may need to make the appropriate

changes to their systems to process the BH.S VTEC code if they

have not done so already. No additional changes are necessary.

 

The test of the new VTEC event code (BH.S) began on May 15, 2012,

and will continue until further notice. For information about the

other five offices taking part in the BHS test, refer to the

original Service Change Notice, issued May 2, 2012: 

 

http://www.nws.noaa.gov/os/notification/scn12-10zone_des-aaa.htm

 

Users are encouraged to provide feedback by using the brief

survey and comment form:

 

http://weather.gov/survey/nws-survey.php?code=CHMBHS

 

General background information on VTEC can be found online at:

 

http://www.nws.noaa.gov/os/vtec

 

If you have questions or comments please contact:

 

Chris Alex

Ecological Forecasting Focal Point

NWS Marine and Coastal Weather Services Branch

Silver Spring, MD 20910

301-713-1858 ext. 171

Christine.Alex@noaa.gov

 

NWS Service Change Notices are online at:

 

http://www.weather.gov/os/notif.htm

 

$$