NOUS41 KWBC 301215

PNSWSH

 

Service Change Notice 17-39

National Weather Service Headquarters Silver Spring, MD

815 AM EDT Thu Mar 30 2017

 

To:         Subscribers:

            -NOAA Weather Wire Service

            -Emergency Managers Weather Information Network

            -NOAAPORT  

            -Other NWS Partners, Users and Employees

 

From:       Allison Allen

            Chief, Marine, Tropical, and Tsunami

            Services Branch

 

Subject:    Depiction of Potential Tropical Cyclones on

            The Unified Surface Analysis and Forecast Marine

            Radiofax Charts effective on or around May 15, 2017

 

Effective on or around May 15, 2017, the NWS National Hurricane

Center (NHC) Tropical Analysis and Forecast Branch (TAFB), the

Ocean Prediction Center, and the Honolulu Weather Forecast

Office (HFO) will provide information for potential tropical

cyclones on the Unified Surface Analysis map as well as on

marine forecast surface and wind wave radiofax charts.

  

Potential tropical cyclones are defined as disturbances that are

not yet tropical cyclones but which pose a threat to land within

48 hours. Potential tropical cyclones will share the naming

conventions currently in place for tropical and subtropical

depressions, with depressions and potential tropical cyclones 

numbered from a single list (e.g., One, Two, Three, ..., Twenty-

Three, etc.). For more information on potential tropical

cyclones, please refer to Service Change Notice 17-28,  

“Changing criteria for issuing tropical cyclone watches and

warnings to include certain land-threatening disturbances that

are not yet tropical cyclones effective on or about May 15,

2017”:

 

http://www.nws.noaa.gov/os/notification/scn17-28potential_tc.htm

 

Tropical cyclone text box information will be included on the

Unified Surface Analysis (USA) as well as all the marine

forecast surface and wind wave radiofax charts.   

 

The text box information will appear with the following wording

for potential tropical cyclones in the Atlantic basin:

 

POTENTIAL T.C. FOUR

MAX WINDS 45 KT G 55 KT

SEE LATEST NHC ADVISORY 

 

The text box information will appear with the following wording

for potential tropical cyclones in the East Pacific basin:

 

POTENTIAL T.C. FOUR-E

MAX WINDS 45 KT G 55 KT

SEE LATEST NHC ADVISORY

 

The text box information will appear with the following wording

for potential tropical cyclones in the Central Pacific basin:

 

POTENTIAL T.C. FOUR-C

MAX WINDS 45 KT G 55 KT

SEE LATEST CPHC ADVISORY

 

If you have comments or questions, please contact:

 

Hugh Cobb

Chief, Tropical Analysis and Forecast Branch

National Hurricane Center

E-mail:  Hugh.Cobb@noaa.gov

Phone:   305-229-4454

 

Darin Figurskey

Chief, Operations Forecast Branch

Ocean Prediction Center

E-mail:     Darin.Figursky@noaa.gov

Phone:      301-683-1497     

 

Tom Evans

Director Operations

Weather Forecast Office Honolulu Hawaii

E-mail:     Tom.Evans@noaa.gov

Phone:      808-973-5273

 

NWS Service Change Notices are online at:

 

      http://www.nws.noaa.gov/om/notif.htm

 

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