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
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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
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Steve Chiswell <chiz@xxxxxxxxxxxxxxxx>
Unidata
