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Re: What is MRF product to WMO header mapping?

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  • Subject: Re: What is MRF product to WMO header mapping?
  • Date: Mon, 4 Oct 1999 14:02:44 -0600
Neil,

I show the typical realtime decoder entries for Gempak at:
http://www.unidata.ucar.edu/packages/gempak/tutorial/pqact/decoders.tbl

You will notice that the grid regions for AIJKL that you refer to below
are:
# NOAAport MRF grids
# Grid #201 N. Hemisphere 381km: ^Y.A... KWBH
# Grid #202 CONUS         190km: ^Y.I... KWBH
# Grid #203 Alaska        190km: ^Y.J... KWBH
# Grid #204 Hawaii        160km: ^Y.K... KWBH
# Grid #205 Puerto Rico   190km: ^Y.L... KWBH
eg, these are not Global.

You will find further down on the page the pattern for thr MRF grids on
the IDD which are Global 3.5-10 days (84-240 hours):
#  MRF grids - Extended range grids E and F
#
HRS     ^H.[EF][A-Z][0-9][0-9] KWB. ([0-3][0-9])([0-2][0-9])..


Note that the MRF global set on the IDD/NOAAport is very limited in the
number of levels and parameters as compared with the previously refered to
regional grids. Here is the correspnding gribtonc entry with cdl from the
decoders package:
# MRF model on global 5.0 x 5.0 degree grid
HRS     ^H.[EF]... KWBC (..)(..)
        PIPE    /usr/local/ldm/decoders/gribtonc
        etc/mrf-e.cdl
        data/GRIB/(\1:yy)(\1:mm)\1\2_mrf-e.nc

Depending on your actual use, you may actually want the
AVN grids for global coverage for forecast hours 0-72 (eg, the MRF is
the extension of the AVN...MRF is 00Z only, while AVN is available 00Z and
12Z):
# AVN model on thinned grids
HRS     ^H.[I-P]... KWB. (..)(..).*(/mAVN|/mSSIAVN)


Steve Chiswell
Unidata User Support


On Mon, 4 Oct 1999, Neil R. Smith wrote:

> Boy, this has turned out to be entirely too difficult to track
> down.  I'm astounded at there being no definitive location
> to get the info from.  Can anyone lend a hand?
> 
> One of my users wants all the MRF forcast products, on a global
> grid, in netcdf format.  
> 
> So,
> - What *are* the MRF products?  ie., what all do they comprise?
> - What are their WMO headers?
> - What is the expected release time and frequency of these
>   products, at least ballpark estimates?
> 
> The listing I've been able to find for the 'current' (12/08/98)
> MRF headers shows the A1 entries to be A,I,J,K,L.  The        WMO
> header decoder shows those to be:
> A - 0-90W NH
> I - 0-90W SH
> J - 90W-180 SH
> K - 180-90E SH
> L - 90E-0 SH
> Is this all there is?
> 
> Any help much appreciated.  -Neil
> -- 
> Neil R. Smith, Sys. Admin.              address@hidden
> Dept. Meteorology, Texas A&M Univ.      409/845-6272 FAX:409/862-4466
> 
>