Dear MSC Datamart users,
On July 3, 2019, the Canadian Meteorological Centre (CMC)
conducted a
major update of its forecast systems.
Full
details of the changes made to the various
systems are available at this address:
http://collaboration.cmc.ec.gc.ca/cmc/CMOI/product_guide/docs/changes_e.html
Among the highlights, I would like to mention the following
points:
- The horizontal resolution of the Global Deterministic
Prediction System (SGPD) is reduced from 25km to 15km, and
the number of vertical levels is increased from 80 to 84
levels.
- The atmospheric component of the Global Ensemble
Prediction System (GEPS) is now coupled with the ocean-ice
model.
- The horizontal resolution of the Regional Ensemble
Prediction System (REPS) increases from 15km to 10km, with
an increase in the output frequency from 2 to 4 runs per
day.
The resolution of the associated GRIB2 data will be increased
accordingly this fall for the benefit of MSC Datamart users
(an announcement will follow).
In the meantime, here is the
list of impacts of this
important update for your applications:
- As announced on May 17, 2009 (*), the REPS grid includes
a limited area of no data in the northeast corner of the
grid, which currently remains at 15 km.
- As announced on May 29, 2010 (**), the new nomenclature
for the Showalter Index and the Uplift Index is now being
applied to the northern domain of the High Resolution
Deterministic Prediction System (HRDPS) and to the
Canadian Arctic Prediction System (CAPS) data available on
DD-Alpha as part of the YOPP project
- The available convective potential energy, CAPE, in
GRIB2 format in the Regional Deterministic Prediction
System (RDPS) dataset has changed nomenclature and is now
found under CAPE_SFC_0 instead of CAPE_ETAL_10000
(encoding change). We apologize for this non announced
change.
- GDPS data are delayed by about 25 minutes and GEPS data
are available about 20 minutes later with respect to the
previous schedule
We apologize for any impact these changes may have on your
applications.
A new important step has just been taken to improve the
quality of the data available to the public.
Feel free to contact me for any additional information you may
require.
Sincerely,
Sandrine