[nws-changes] 20110523: comments Hawaii--Fwd: ADMIN NOTICE NOUS41 KWBC

• To: nws-changes@xxxxxxxxxxxxxxxx
• Subject: [nws-changes] 20110523: comments Hawaii--Fwd: ADMIN NOTICE NOUS41 KWBC
• From: Linda Miller <lmiller@xxxxxxxxxxxxxxxx>
• Date: Mon, 23 May 2011 13:34:08 -0600

-------- Original Message --------

479
NOUS41 KWBC 231912
PNSWSH

Public Information Statement, Comment Request
National Weather Service Headquarters, Washington, DC
312 PM EDT Mon May 23 2011

To:        Subscribers:
           -Family of Services
           -NOAA Weather Wire Service
           -Emergency Managers Weather Information Network
           -NOAAPORT
           Other NWS Partners, Users and Employees

From:      Geoff DiMego
           Chief, Mesoscale Modeling Branch
           NCEP/Environmental Modeling Center

Subject:   Soliciting Public Comments through June 30, 2011,
           On the Removal of NCEPs Regional Spectral Model
           for Hawaii

The National Centers for Environmental Prediction (NCEP) is
proposing to stop running the Regional Spectral Model (RSM) and
discontinue all output products from this model. The RSM is
currently only run for a domain over the Hawaiian Islands. NWS
Pacific Region has agreed to discontinue the RSM run after NCEP
added a Guam domain to its HiResWindow suite in March 2011.
Output of the HiResWindow suite includes the Hawaiian Islands and
provides an alternative source of information for the RSM. NWS is
seeking comments on this proposed change through June 30, 2011.

The RSM is a limited-area atmospheric model using a spectral
method for horizontal advection. The model uses hydrostatic
dynamics; it is run for Hawaii with the equivalent of 10 km
horizontal resolution, at 20 North, using a grid of 97x76 points
on 42 levels. Runs are made twice daily from 00z and 12z and
range to 48 hours.

The RSM has been run operationally since June 1997 to provide
numerical guidance for use by NWS Weather Forecast Offices in
Hawaii. The Hawaii RSM products (211 fields per output time) are
only disseminated via the NWS and NCEP FTP servers. These
products are not available on NOAAPORT. At this time, the NWS no
longer has a requirement to produce these runs or products
because newer products have been introduced that meet the needs
of forecasters.

The table below lists characteristics of the RSM and other
current (and imminent) NCEP Operational Products, all of which
are based on nonhydrostatic dynamics, that 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:

http://www.nco.ncep.noaa.gov/pmb/changes/rsm_removal.shtml

Product    Runs/day  Range         Resolution     Grid
RSM         2         48hr         10km/42lev     see URL above
NAM         4         84hr         12 km/60lev    grid #182
NAM nest*   4         60hr          3 km/60lev    grid #196
HiResWindow
  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 July 2011.  See NWS
  TIN 11-16 for more details on the NAM nest.

NWS will evaluate all comments to determine whether to proceed
with this change. If approved, a TIN will be issued containing
implementation dates.

Send comments on this proposal to:

   Geoff DiMego
   NWS/NCEP Environmental Modeling Center
   Camp Springs , MD
   geoff.dimego@xxxxxxxx
or
  Rebecca Cosgrove
  NWS/NCEP Central Operations
  Camp Spring, MD
  rebecca.cosgrove@xxxxxxxx

National Public Information Statements are online at:

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

$$
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