Major CMC upgrade, Starting at 12z run, 2/13/13 Options

[NYCSuburbs]

It's about time... that model greatly deserves an upgrade. I really hope the NAM is up next...

Brief highlights from important upgrades:
- 12z runs now up to hour 240
- Resolution increased from 33km to 25km
- Accuracy particularly increased over North America during the winter

MAJOR UPGRADE TO THE GLOBAL DETERMINISTIC PREDICTION SYSTEM GDPS-
VERSION 3.0.0) AT THE CANADIAN METEOROLOGICAL CENTRE
ON WEDNESDAY FEBRUARY 13, 2013, STARTING WITH THE 1200 UTC RUN, THE
CANADIAN METEOROLOGICAL CENTRE (CMC) OF THE METEOROLOGICAL SERVICE
OF CANADA (MSC) WILL IMPLEMENT VERSION 3.0.0 OF ITS GLOBAL
DETERMINISTIC PREDICTION SYSTEM (GDPS), HEREAFTER REFERRED TO AS
GDPS-3.0.0. THE MAIN CHANGES OF THIS UPDATE ARE:

- CHANGES TO THE 4D-VAR DATA ASSIMILATION SYSTEM: - THE USE OF
ADDITIONAL REMOTE SENSING DATA: - AN INCREASE IN HORIZONTAL
RESOLUTION FROM 33 TO 25 KM: - IMPORTANT CHANGES IN THE GEM MODEL
PHYSICS: - AND 1200 UTC RUNS NOW DONE TO 240 HOURS AS FOR 0000 UTC
RUNS.

OBJECTIVE SCORES DONE IN DEVELOPMENT AND PARALLEL RUN PHASES SHOW
IMPROVEMENTS IN THE FORECASTS WITH MOST METRICS THROUGHOUT MOST OF
THE ATMOSPHERE, IN PARTICULAR OVER NORTH AMERICA IN WINTER. THESE
IMPROVEMENTS ARE OF AN ORDER OF MAGNITUDE USUALLY SEEN ONLY ONCE IN
A DECADE. A SUBJECTIVE EVALUATION BY OPERATIONAL METEOROLOGISTS AT
CMC CONFIRMED THOSE IMPROVEMENTS. OTHER FORECAST SYSTEMS WHICH
DEPEND ON GDPS OUTPUT ALSO BENEFIT FROM THE GDPS-3.0.0. CHANGES
WERE MADE TO THE REGIONAL DETERMINISTIC PREDICTION SYSTEM (RDPS) TO
HARMONIZE IT WITH THE NEW GDPS, AND THE RDPS FORECASTS ARE ALSO
IMPROVED AS A RESULT, SO ITS VERSION NUMBER IS ALSO INCREASED TO
3.1.0, AND IS HEREAFTER REFERRED TO AS RDPS-3.1.0.

Source

This post has been edited by NYCSuburbs: Feb 12 2013, 11:03 AM

[NYCSuburbs]

The 0z run tonight, if I understand things correctly, was the last run of the CMC as we know it. For comparison purposes with the 12z run, I posted several frames, which I'll compare later in the day to where they were are the 12z run, and later on which one is the most accurate.

Hour 30 (2/14 6z):



Hour 84 (2/16 12z):



Hour 114 (2/17 18z):



Hour 180 (2/20 12z):



Hour 240 (2/23 0z):

[NYCSuburbs]

Already seeing nice differences in the CMC P-type maps - you can already tell resolution is higher with the 12z run vs. the old 0z run:

12z:



0z:

[NYCSuburbs]

Comparing the 0z CMC images above vs. the new 12z CMC:

Hour 18 (2/14 6z):



Hour 72 (2/16 12z):



Hour 102 (2/17 18z):



Hour 168 (2/20 12z):



Hour 228 (2/23 0z):