NOUS41 KWBC 201856 AAA

PNSWSH

 

Technical Implementation Notice 14-17, Amended

National Weather Service Headquarters Washington DC

255 PM EDT Fri Jun 20 2014

 

To:      Subscribers:

         -Family of Services

         -NOAA Weather Wire Service

         -Emergency Managers Weather Information Network

         -NOAAPORT

         Other NWS Partners and Employees

 

From:    Mark Tew

         Chief, Marine and Coastal Weather Services Branch 

 

Subject: Amended: Multi-Grid Hurricane Wave Model Added to SBN

         and NOAAPORT: Effective July 8, 2014

 

Amended to change the effective date from June 24 to July 8, 2014 

 

Effective on or around July 8, 2014, with the 1200 Coordinated

Universal Time (UTC) run, the Multi-grid Hurricane Wave model

produced by the National Centers for Environmental Prediction

will be added to the SBN and NOAAPORT.

 

The Multi-grid Hurricane Wave model is run as a mosaic of ten

grids:

 

 1) 0.5 degree global domain grid

 2) 0.25 degree regional domain for North Atlantic

 3) 0.25 degree regional domain for North Pacific

 4) 10 arc min grid for the North Atlantic regional waters

 5) 10 arc min grid for the North Pacific regional waters

 6) 10 arc min grid for the Pacific Islands and Hawaii

 7) 10x15 arc min grid for the Alaskan waters

 8) 4 arc min grid for the US East Coast

 9) 4 arc min grid for the US West Coast (including the

    coastal waters of Hawaii)

10) 8x4 arc min grid for the Alaskan coast

 

The grids have internal two-way coupling and exchange information

during the computational cycle.

 

Wind forcing for the global, Alaskan and Pacific Island grids

will be from the Global Forecast System (GFS) winds while all the

other grids are currently using a blend of the GFS and GFDL

hurricane model winds. The only exception is the Hawaiian

Islands, part of the Pacific Island grid, which also will have a

blend of GFS and hurricane model wind forcings.

 

The forecast interval will be provided over the SBN and NOAAPORT

as follows: 0 to 72 hours - 3 hours; 72 to 126 hours - 6 hours.

 

GRIB2 files will be available 5 hours after the synoptic time

(00, 06, 12, 18 UTC.) The per cycle data volume will be

approximately 900 MB.

 

The WMO Heading for these products will be as follows:

 

T1:     DATA FORMAT OF GRIB2 /E/

T2:     PARAMETER CODE /ONE OF ABCJKLMNOPQRWY/

A1:     GRID CODE /ONE OF ABCDEFGHMQ /

A2:     FORECAST TIME /ONE OF ABCDEFGHIJKLMNOPQRSTUVWXYZ/

II:     LAYER OR LEVEL /88/

CCCC:   KWBU

 

Information on WMO Headers and NECP GRIB messages is online at:

 

   http://www.nco.ncep.noaa.gov/pmb/docs/on388/appendixa.html

 

For a complete listing of WMO Headings please refer to the

following web page:

 

   http://www.nws.noaa.gov/os/notification/mc/hurr_wave.pdf

 

For questions concerning the Multi-grid Hurricane Wave model

contact:

 

     Hendrik Tolman

     NCEP/EMC Chief Marine Modeling and Analysis Branch

     5830 University Research Ct

     College Park, MD 

     Phone: (301) 683-3748 

     Email: Hendrik.Tolman@noaa.gov

 

For questions regarding SBN and NOAAPORT activation contact:

 

     John Kuhn

     Marine and Coastal Services Branch

     Silver Spring, MD

     Phone: (301) 713-1677 x121 

     Email: John.F.Kuhn@noaa.gov

 

National Technical Implementation Notices are online at:

 

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

 

$$