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Re: [conduit] CONDUIT changes for NAM 40KM grid 212 implemented

On Wed, 2007-10-17 at 09:41 -0400, Geoff DiMego wrote:
> Steve - it appears by dropping awipak (#216) and grbgrd (#104)
> you've dropped support from NAM for Alaska & Canada since awip3d
> is grid #212 which covers only CONUS.

Geoff,

We haven't dropped the AWIPAK or the GRDGRD  grids. The reminder
announcement was that the duplicate GRIB1 version of these files
was being removed. The GRIB2 version of these files has been included
on CONDUIT for the past 2 weeks. Users continue to have access to both
the AWIPAKand GRBGRD data in GRIB2 format on CONDUIT. This is in
response to the transition of all grids on the ftp servers from GRIB1 to
GRIB2. The GRIB2 data has been posted for users to prepare their codes
for quite some time, and we are using a 2 week overlap period as well
for users to prepare their tranition on CONDUIT. Once the transition of
remaining GRIB1 data sets on CONDUIT is complete, we will be able to
consider adding other data sets given that the GRIB2 transition is
reducing the current data volume. The AWIP32grids are available as
GRIB2, but first we have to transition the GRID3 and GRID2 GFS grids
from GRIB1 to GRIB2, allowing for a 2 week overlap with both data sets
being sent. After that extra volume is removed, then new additions can
be made 

Steve Chiswell
Unidata User Support


> 
> Have you considered putting the awip32 on CONDUIT as well?  This grid
> is #221 and is a 32 km Lambert grid which covers most of North America.
> It also contains the most output fields (885 at last count) of any of
> our numerous NAM output grids.  Awip3d has "only" 617 fields.
> 
> Most of our NAM, HiResWindow and RUC output grids are listed with links
> to inventories, plots etc at Eric Rogers' page: 
> http://www.emc.ncep.noaa.gov/mmb/namgrids/
> 
> 
> 
> Steve Chiswell wrote:
> > CONDUIT Data users,
> > 
> > Just as a reminder, the GRIB2 format 40 Km NAM (awip3d) grids were added to
> > the CONDUIT data stream beginning with the 12Z run today. The legacy GRIB1
> > awipak (grid 216) and grbgrd (grid 104) grids were removed at the same time.
> > 
> > The awip3d grids will be available as both GRIB1 and GRIB2 format products
> > on CONDUIT for 2 weeks. On Oct 30, the GRIB1 awip3d grids will be removed.
> > 
> > Steve Chiswell
> > Unidata User Support
> > -----------------------------------------------------------------------------
> > 
> > 
> > Date: Fri, 21 Sep 2007 13:21:10 -0600
> > 
> > CONDUIT data users,
> > 
> > On Tuesday Sep 25, NCEP will begin producing 10 additional fields in the
> > GEFS ensemble data output in support of TIGGE. These fields are:
> > 
> > - Specific humidity at 1000, 925, 850, 700, 500, 300, 250, & 200 mb
> > - Potential vorticity at 320K theta
> > - Dewpoint temperature at 2 m AGL
> > 
> > These parameters will be added to the files being inserted as:
> > data2/TIGGE/gepXX.tHHz.pgrb2cfFF
> > 
> > The current size of these files is ~300KB, and will increase to ~800KB
> > per perturbation (20) and forecast time (65) for a total of 650MB per
> > run time (4x per day).
> > 
> > After taking in to account feedback received from my message on Sep 13,
> > 2007 regarding replacement of existing GRIB1 data sets with GRIB2
> > versions, a two
> > week transition period between changes will be scheduled as follows:
> > 
> > DATE
> > 
> > 10/02/2007
> > 
> > 
> > Remove existing RUC GRIB1 data
> > (GRIB2 data already being sent)
> > Add NAM awipak and grbgrd GRIB2 data
> > files
> > 
> > 
> > 10/16/2007
> > 
> > 
> > Remove NAM awipak and grbgrd GRIB1
> > data files
> > Add NAM awip3d GRIB2 data files
> > 
> > 
> > 10/30/2007
> > 
> > 
> > Remove NAM awip3d GRIB1 data files
> > 
> > I will be updating the CONDUIT data examples on the web page with
> > additional
> > patterns to reflect these changes.
> > 
> > Steve Chiswell
> > Unidata User Support
> > 
> > 
> > 
-- 
Steve Chiswell <address@hidden>
Unidata