NOUS41 KWBC 211820



Technical Implementation Notice 11-34

National Weather Service Headquarters, Washington, DC

220 PM EDT Thu Jul 21 2011


To:          Subscribers:

             -Family of Services

             -NOAA Weather Wire Service

             -Emergency Managers Weather Information Network


             Other NWS Partners, Users and Employees


From:        Geoff DiMego

             Chief, Mesoscale Modeling Branch

             NCEP/Environmental Modeling Center


Subject:     Termination of NCEP’s Regional Spectral Model for     

             Hawaii:  Effective September 13, 2011


Effective Tuesday, September 13, 2011, with the 1200 Universal

Coordinated Time (UTC) cycle, the National Centers for

Environmental Prediction (NCEP) will stop running the Regional

Spectral Model (RSM) for Hawaii and discontinue all output

products from this model run.


A Public Information Statement was issued on May 23, 2011,

requesting comments on the proposed termination of the RSM for

Hawaii. Please see:


Based on the responses received, the decision was made to

terminate the RSM run and associated output products for Hawaii.


The RSM is a hydrostatic limited-area atmospheric model using a

spectral method for horizontal advection. It is run to 48 hours

twice daily over Hawaii with an equivalent grid spacing of 10 km

on 42 levels. 


The table below lists characteristics of the RSM and other

current, and imminent, NCEP Operational Products, all of which

are based on nonhydrostatic dynamics, and all of which provide

similar or better guidance than the Hawaii RSM. More details

about the exact grids and products available for each of the

items listed in the table below are available at:


Product    Runs/day  Range         Resolution     Grid    

RSM            2      48hr         10 km/42lev    see URL above

NAM            4      84hr         12 km/60lev    grid #182

NAM nest*      4      60hr          3 km/60lev    grid #196


WRF-ARW        2      48hr          5 km/35lev    see URL above

WRF-NMM        2      48hr          4 km/35lev    see URL above


* NAM nest is planned for implementation in August or September

2011.  See NWS  TIN 11-16 for more details on the NAM nest.


If you have questions about this termination, please contact:


   Geoff DiMego

   NWS/NCEP Environmental Modeling Center

   Camp Springs, MD


   Rebecca Cosgrove

  NWS/NCEP Central Operations

  Camp Spring, MD


National Public Information Statements are online at: