NOCN03 CWAO 071810 GENOT ADMIN. NO. 001 VERSION FRANCAISE DE CE GENOT NO. 002 FRENCH VERSION OF THIS GENOT NO. 002 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. 1. BACKGROUND THE GDPS IS LAUNCHED FOUR TIMES A DAY IN ANALYSIS MODE, WITH ANALYSIS TIMES CENTERED AT 0000, 0600, 1200 AND 1800 UTC. IN FORECAST MODE IT IS LAUNCHED TWICE A DAY WITH INITIAL TIME AT 0000 AND 1200 UTC. IN ADDITION TO PROVIDING ANALYSIS AND GUESS FIELDS TO ITS OWN FORECAST COMPONENT, THE GDPS ANALYSIS COMPONENT PROVIDES THE INITIAL CONDITIONS FOR THE GUESS FIELDS OF THE RDPS, THEREFORE THESES CHANGES INFLUENCE THE ANALYSIS COMPONENT OF THE RDPS. GDPS-300 CHANGES ARE THREEFOLD: THEY CONCERN THE ASSIMILATION SCHEME FOR THE ANALYSIS, THE ASSIMILATION OF NEW DATA, AND CHANGES TO THE FORECAST COMPONENT FOR ITS RESOLUTION AND PHYSICS SCHEME. THEY ARE DESCRIBED IN MORE DETAILS IN THE FOLLOWING SECTIONS. 2. CHANGES TO THE 4D-VAR ASSIMILATION SCHEME 2.1 OUTER LOOP CONFIGURATION: A) ANALYSES GENERATED ON A NEW STAGGERED VERTICAL COORDINATE. B) SAME DYNAMICS, PHYSICS, RESOLUTION AS THE NEW FORECAST MODEL. C) SLIGHTLY SHORTER TIME-STEP (9 MIN INSTEAD OF 12) THAN THE MODEL COMPONENT, TO SYNCHRONIZE IT WITH THE INNER-LOOP TIME-STEPPING. 2.2 INNER LOOP CONFIGURATION: A) HORIZONTAL GRID INCREASED FROM 240X120 TO 400X200 POINTS. B) THE NON-LINEAR, TANGENT-LINEAR AND ADJOINT MODELS USED IN THE INNER LOOP ARE STILL BASED ON THE GEM THAT USES THE NON-STAGGERED HYBRID VERTICAL COORDINATE. C) THE SPECTRAL RESOLUTION OF BACKGROUND ERROR COVARIANCES, STILL DEFINED ON NON-STAGGERED HYBRID LEVELS, IS EXTENDED FROM T108 TO T180, EFFECTIVELY INCREASING THE RESOLUTION OF ANALYSIS INCREMENTS. D) THE TIME STEP IS REDUCED FROM 45 TO 18 MIN OR 21 BINS IN A 6-H WINDOW, COMPARED TO 9 BINS IN THE PREVIOUS SYSTEM. THIS INCREASES SIGNIFICANTLY THE TOTAL AMOUNT OF DATA ASSIMILATED. E) THE NUMBER OF ITERATIONS IS INCREASED FROM 55 (30 IN THE FIRST LOOP + 25 IN THE SECOND), TO 65 (35 + 30). ALL THESE CHANGES COMBINED LEAD TO SIGNIFICANT IMPROVEMENTS IN THE MIDDLE-RANGE FORECASTS. 2.3 SURFACE ANALYSIS THE ANALYSIS OF SURFACE TEMPERATURE WAS MODIFIED TO USE THE NEW TOPOGRAPHY FIELD AT 25 KM RESOLUTION. 2.4 CHANGES MADE TO MAINTAIN CONSISTENCY WITH THE RDPS THE GDPS ANALYSIS PROVIDED TO THE RDPS NOW HAS TO BE INTERPOLATED VERTICALLY FROM STAGGERED TO NON-STAGGERED HYBRID LEVELS. AS IN THE PREVIOUS VERSION, BOTH THE DRIVER AND LIMITED AREA MODEL (LAM) SUBSYSTEMS OF THE RDPS UTILIZE THE BIAS CORRECTION COEFFICIENTS PRODUCED BY THE GDPS. CHANGES IN THE GDPS BIAS CORRECTION (AS DESCRIBED ABOVE) THUS HAVE A MARKED AND GENERALLY POSITIVE IMPACT ON THE PERFORMANCE OF THE RDPS-3.1.0. 3. CHANGES RELATIVE TO THE REMOTE SENSING DATA. 3.1 BIAS CORRECTION COEFFICIENTS THE BIAS CORRECTION COEFFICIENTS FOR THE ASSIMILATED SATELLITE RADIANCE OBSERVATIONS ARE UPDATED, RESULTING IN A SIGNIFICANT REDUCTION IN THE GEOPOTENTIAL HEIGHT AND TEMPERATURE BIASES IN THE STRATOSPHERE. 3.2 GPS-RO DATA THE THERMODYNAMIC RELATIONSHIP OF GPS-RO DATA WAS UPDATED, TO OBTAIN A BETTER AGREEMENT BETWEEN GPS-RO AND RADIOSONDE TEMPERATURES, BOTH BEING USED AS ANCHOR MEASUREMENTS FOR THE ASSIMILATION SYSTEM. 3.3 NEW OBSERVATION DATA THESE NEW DATA ARE ADDED IN ORDER TO MAINTAIN THE CONTINUITY AND ROBUSTNESS OF THE DATA ASSIMILATION SYSTEM: A) ADDITION OF POLAR SATWINDS PRODUCED BY THE AVHRR INSTRUMENT ONBOARD METOP-2 AND THE VARIOUS NOAA SATELLITES. B) A GREATER AMOUNT OF ATOVS (AMSUA, AMSUB/MHS) DATA IS NOW ASSIMILATED WITH THE ADDITION OF RARS (REGIONAL ATOVS RETRANSMISSION SERVICE) SETS OF DATA. C) THE RADIANCE DATA FROM THE WATER VAPOUR CHANNEL OF THE GOES-13 (E), GOES-15 (W) AND MTSAT-2 SATELLITES ARE NOW ASSIMILATED. D) RADIANCE DATA OF THE 7 SSM/I-LIKE MICROWAVE CHANNELS FROM THE SSMIS INSTRUMENT ONBOARD THE DMSP17 AND DMSP18 SATELLITES ARE ADDED TO THE DATA ALREADY ASSIMILATED FROM THE DMSP16 SATELLITE. THE NEW OBSERVATION SOURCES ADDED IN THE GDPS-3.0.0 ARE ALSO ADDED TO THE RDPS-3.1.0. 4. CHANGES TO THE FORECAST MODEL 4.1 GLOBAL MODEL GRID (HORIZONTAL RESOLUTION) A) MODEL GRID (NON-ROTATED, LATITUDE-LONGITUDE) CHANGED FROM 800X600 GRID POINTS (RESOLUTION OF APPROXIMATELY 33KM AT MID- LATITUDES) TO 1024X800 (APPROXIMATELY 25KM): B) TIME STEP REDUCED ACCORDINGLY, FROM 15 TO 12 MIN: C) THE NUMBER OF PROGNOSTIC VERTICAL LEVELS (79) AND THE POSITION OF THE MODEL LID (ABOUT 0.1 HPA) REMAIN THE SAME. 4.2 CHANGES TO THE DYNAMICS A) THE MODEL'S TERRAIN-FOLLOWING VERTICAL COORDINATE IS CHANGED TO A COORDINATE OF THE TYPE LOG-HYDROSTATIC PRESSURE. B) THE DISCRETIZATION OF THE PREVIOUS COORDINATES WAS ON A REGULAR (NON-STAGGERED) GRID, THE NEW COORDINATES ARE DISCRETIZED ON A STAGGERED GRID OF THE CHARNEY-PHILLIPS TYPE. THOSE CHANGES ABOVE AND OTHER NUMERICAL CHANGES BRING AN OVERALL REDUCTION OF NOISE, AN ENHANCED NUMERICAL STABILITY, IMPROVED CONSERVATION PROPERTIES, AND A SIGNIFICANT REDUCTION OF FORECAST ERRORS IN THE STRATOSPHERE. DETAILS ABOUT THE NEW COORDINATES AND GRID, AND THEIR BENEFITS, MAY BE FOUND IN GIRARD AND PLANTE (2012). 4.3 CHANGES TO THE PHYSICS SEVERAL CHANGES TO PHYSICS PARAMETERIZATION AND SCHEMES ALSO LEAD TO SIGNIFICANT REDUCTIONS IN FORECAST ERRORS. MORE PRECISELY: A) THE BULK DRAG COEFFICIENT WITHIN THE PARAMETERIZATION OF THE LOW-LEVEL DRAG (ASSOCIATED WITH UPSTREAM BLOCKING OF THE FLOW OVER UNRESOLVED MOUNTAINS) IS NOW ALLOWED TO VARY ACCORDING TO THE NON- UNIFORM STATIC STABILITY OF THE FLOW, AND TO THE INCIDENT WIND DIRECTION. THIS GREATLY IMPACTS THE GENERAL CIRCULATION OF THE MODEL, ESPECIALLY IN WINTER. B) THE INTRODUCTION OF A PHYSICALLY-BASED HYSTERETIC EFFECT IN THE PLANETARY BOUNDARY LAYER (PBL) SCHEME REDUCES THE ERRORS IN THE THERMAL STRUCTURE IN AREAS WITH STRONG TEMPERATURE ADVECTION, WITHOUT ADVERSELY AFFECTING GUIDANCE IN OTHER REGIONS. THIS IS PARTICULARLY IMPORTANT FOR THE FORECAST OF PRECIPITATION TYPES DURING WINTER AT MID-LATITUDES. C) CHANGES IN THE NON-OROGRAPHIC GRAVITY WAVE DRAG WHICH IMPROVES THE CIRCULATION NEAR THE MODEL LID. D) OPTIMIZED SUB-TERRAIN EXTRAPOLATION ALGORITHM LEADING TO LESS NOISY FIELDS SUCH AS THE SEA-LEVEL PRESSURE OVER THE CONTINENTS. E) ADDITIONAL IMPROVEMENTS TO THE NUMERICAL CODE MAKE THE MODEL MORE ROBUST, WITH NO ADVERSE IMPACT ON THE FORECASTS. 4.4 CHANGES TO THE CLIMATOLOGICAL AND GEOPHYSICAL FIELDS A) TWO NEW SETS OF GEOPHYSICAL FIELDS WERE GENERATED, FIRST ON A 1024X800 GRID FOR THE OUTER-LOOP MODEL, AND A SECOND ON A 400X200 GRID FOR THE INNER-LOOP OF THE ASSIMILATION SCHEME. B) A NEW AND MORE REALISTIC MONTHLY GLOBAL CLIMATOLOGY OF SEA-ICE THICKNESS, MERGING THREE SOURCES OF DATA, IS IMPLEMENTED IN THE GDPS-3.0.0, AS WAS DONE IN OCTOBER 2012 IN THE RDPS. 5. OBJECTIVE PERFORMANCE EVALUATION IN DEVELOPMENT PHASE THE GDPS-3.0.0 WAS TESTED WITH TWO SETS OF ANALYSIS AND FORECASTS CYCLES, EACH COVERING MORE THAN TWO SUMMER MONTHS AND TWO WINTER MONTHS. IN THE FINAL TESTS, VERIFICATION OF UPPER AIR AND SURFACE FIELDS AGAINST RADIOSONDE DATA SHOWED A SIGNIFICANT IMPROVEMENT AT ALL FORECAST LEAD-TIMES OVER MOST REGIONS AND FOR BOTH SEASONS. THE GDPS-3.0.0 PARALLEL RUN BEGAN THE THIRD WEEK OF OCTOBER 2012, AND ENDED LATE JANUARY 2013. SCORES WERE COMPILED FOR THE PERIOD FROM OCTOBER 29TH 2012 TO JANUARY 21ST 2013. THE RDPS-3.1.0 PARALLEL RUN WAS SCORED FROM NOVEMBER 14TH, 2012 TO JANUARY 21ST, 2013. 5.1 SUMMARY OF RESULTS FOR UPPER AIR FIELDS: - WARMER TEMPERATURES, IN BETTER AGREEMENT WITH THE OBSERVATIONS, IN THE UPPER-TROPOSPHERE AND THE STRATOSPHERE. - A SIGNIFICANT REDUCTION IN THE STANDARD DEVIATION OF FORECAST ERRORS IS OBSERVED THROUGHOUT THE TROPOSPHERE, MOST NOTABLY OVER THE EXTRA-TROPICS IN THE WINTER SEASONS, ATTRIBUTED TO THE MODIFICATIONS TO THE OROGRAPHIC BLOCKING AND BOUNDARY LAYER SCHEME. - A SIGNIFICANT REDUCTION OF DAY-5 ERRORS (BIAS AND STANDARD DEVIATION) FOR TEMPERATURE AND GEOPOTENTIAL, AT PRACTICALLY ALL LEVELS DURING WINTER OVER NORTH AMERICA: THE MAXIMUM IMPROVEMENT IS FOUND FOR THE TEMPERATURE STANDARD DEVIATION BELOW 850 HPA. - DURING THE PARALLEL RUN, STATISTICALLY SIGNIFICANT IMPROVEMENT WAS NOTED AT ALL LEVELS OUT TO DAY 10 OVER THE NORTHERN HEMISPHERE (20-90N) AND OUT TO LEAD TIMES OF DAY 6 TO 8 OVER NORTH AMERICA. VERIFICATION AGAINST ANALYSES GENERALLY CONFIRMS THE IMPROVEMENTS MEASURED BY THE SCORES AGAINST RADIOSONDES. 5.2 QUANTITATIVE PRECIPITATION FORECASTS (QPF) FORECASTS FROM THE WINTER AND SUMMER CYCLES WERE VERIFIED AGAINST THE SYNOPTIC (AT 0000 AND 1200 UTC OVER NORTH AMERICA) AND HIGH DENSITY U.S. SHEF NETWORKS (AT 1200 UTC OVER THE U.S. ONLY). IN THE DEVELOPMENT TEST, THE IMPACT OF THE NEW SYSTEM IS MOSTLY NEUTRAL IN SUMMER: IN WINTER, BECAUSE OF THE UNCERTAINTY IN THE QUALITY OF THE OBSERVATIONS (ESPECIALLY FOR LARGE AMOUNTS), THE EVALUATION WAS NOT CONCLUSIVE. IN PARALLEL RUN, SCORES OUT TO THE DAY 5 LEAD TIME WERE NEUTRAL OR SHOWED A SLIGHT IMPROVEMENT OVER THE OPERATIONAL MODEL. HOWEVER IN THE HIGHER AMOUNTS CATEGORIES SOME OVER-FORECAST IS NOTED. 5.3 TROPICAL CYCLONES (TCS) TCS FROM THE SUMMER CYCLE FORECASTS WERE TRACKED OVER THE ATLANTIC, EAST PACIFIC AND WEST PACIFIC BASINS, AND COMPARED TO BEST TRACK DATA PROVIDED BY THE US NATIONAL HURRICANE CENTRE AND THE JOINT TYPHOON WARNING CENTER. OVERALL, THE GDPS-3.0.0 SHOWS A SIGNIFICANT INCREASE IN TC HIT RATE, AND A REDUCTION IN THE INTENSITY BIAS, RESULTING FROM THE INCREASED RESOLUTION OF BOTH THE FORECAST AND ANALYSES COMPONENTS. THIS IS MORE EVIDENT OVER THE ATLANTIC AND EAST PACIFIC BASINS, WHERE SMALL-SCALE TCS OCCUR MORE FREQUENTLY. NO SIGNIFICANT CHANGES WERE FOUND IN THE AVERAGE TC POSITION ERRORS OR IN THE NUMBER OF FALSE ALARMS. 5.4 VERIFICATION SCORES FOR THE RDPS-3.1.0 SCORES DONE FOR THE RDPS-3.1.0 IN DEVELOPMENT PHASE SHOW RESULTS QUALITATIVELY SIMILAR TO THOSE FOR THE GDPS-3.0.0, BUT LESS ROBUST, AND WITH LESS LEVELS WHERE STATISTICAL SIGNIFICANCE IS ACHIEVED, SINCE NO CHANGES WERE DONE ON THE MODEL COMPONENT OF THE SYSTEM. IN PARALLEL RUN SCORES FOR THE RDPS-3.1.0 PARALLEL ARE STRONGLY IMPROVED IN THE UPPER ATMOSPHERE: THERE IS A SMALL BUT STATISTICALLY SIGNIFICANT IMPROVEMENT THROUGHOUT THE TROPOSPHERE, AT ALL LEVELS AND FORECAST TIMES EXCEPT FOR DAY 1 AT 850 HPA AND BELOW, WHERE THE SIGNAL IS NEUTRAL. 5.5 UMOS GLOBAL THE TRAINING OF THE UMOS (UPDATABLE MODEL OUTPUT STATISTICS) WITH THE NEW GDPS-3.0.0 HAS BEEN CARRIED OUT USING HINDCASTS FOR WINTER AND SUMMER 2011. IN ADDITION, TRAINING FOR THE WINTER SEASON HAS ADVANCED DURING THE PARALLEL RUN FOR ALL RUNS. VERIFICATIONS PERFORMED FOR BOTH SEASONS HAVE SHOWN THAT THE ACCUMULATED CASES ENSURE A STABLE AND ROBUST PRODUCTION OF REGRESSION EQUATIONS, AND THAT IN TERMS OF BIAS, ROOT MEAN SQUARE ERROR AND VARIANCE REDUCTION, THE AVERAGED OVERALL PERFORMANCES OF THE UMOS FORECASTS ARE MAINTAINED AND EQUIVALENT TO THE OPERATIONAL SYSTEM. 5.6 SCRIBE THE SCRIBE FORECAST SYSTEM CONNECTED TO GDPS-3.0.0 OUTPUT IN PARALLEL MODE WAS VERIFIED WITH THE SCRIBE VERIFICATION SYSTEM FOR THE PERIOD EXTENDING FROM NOVEMBER 2ND 2012 TO JANUARY 7, 2013, AND THE VERIFICATIONS RESULTS ARE GREATLY IN FAVOR OF THE PARALLEL MODEL. 5.7 OTHER SYSTEMS NO ADVERSE IMPACT WAS NOTED ON THE CANADIAN SEASONAL INTER-SEASONAL PREDICTION SYSTEM (CANSIPS), AND NEITHER ON FORECAST DOMAINS OF THE DETERMINISTIC WAVE PREDICTION SYSTEM DEPENDANT ON THE GDPS. 6. SUBJECTIVE EVALUATION DURING THE PARALLEL RUN OPERATIONAL METEOROLOGISTS AT CMC EVALUATED SUBJECTIVELY ON A DAILY BASIS THE GDPS-3.0.0 AGAINST THE OPERATIONAL GDPS. WHEN A DIFFERENCE IN MASS FIELDS FORECASTS WAS FOUND (MORE THAN 40 PERCENT OF THE TIME): - PREFERENCE FOR THE GDPS-3.0.0 WAS GENERALLY BY A RATIO NEAR 2:1 OR BETTER, FOR ALL REGIONS AND LEAD TIMES: - DIFFERENCES WERE MORE FREQUENT ALONG THE ATLANTIC AND PACIFIC COAST: - WHEN THE SYSTEMS DIFFERED, PREFERENCE FOR THE GDPS-3.0.0 WAS STRONGER OVER THE ARCTIC REGION: WHEN A DIFFERENCE IN THE QPF WAS FOUND (MORE THAN 45 PERCENT OF THE TIME), PREFERENCE WAS SLIGHTLY IN FAVOR OF THE GDPS-3.0.0. THE CMC OPERATIONAL METEOROLOGISTS ALSO HAD THESE OBSERVATIONS: - A GENERAL INCREASE IN THE DETAIL OF PRECIPITATION PATTERNS IS SEEN, DUE TO THE INCREASE IN RESOLUTION: - BETTER HANDLING OF CYCLOGENESIS TO THE LEE OF THE ROCKIES: - BETTER HANDLING OF SHORT WAVES TRAPPED IN A CLOSED CIRCULATION OVER THE ARCTIC: - FASTER CONVERGENCE TOWARD A BETTER SOLUTION ON THE PART OF THE NEW GDPS-3.0.0 WHEN LARGE ERRORS WERE NOTED AT LONG LEAD TIME: - IN GENERAL, BETTER HANDLING OF SO CALLED WARM NOSE THERMAL PROFILES, WITH THE INTRODUCTION OF AN HYSTERETIC EFFECT IN THE TRANSITION BETWEEN LAMINAR AND TURBULENT FLOW (SEE SECTION 4.3 B). - CUT-OFF UPPER LOWS ARE OFTEN FOUND TO FORM EARLIER AND TO OPEN LATE WITH THE NEW SYSTEM. THE BEHAVIOR OF THE GDPS-3.0.0 WITH HURRICANE SANDY, WHICH MADE LANDFALL OVER THE EASTERN UNITED STATES ON OCTOBER 30TH 2012, WAS GENERALLY BETTER OR MARGINALLY BETTER THAN THAT OF THE OPERATIONAL GDPS, ESPECIALLY AT LEAD TIMES LONGER THAN 48 HOURS. A SUBJECTIVE EVALUATION OF THE NEW RDPS-3.1.0 WAS ALSO DONE. THERE WAS NOT A STRONG PREFERENCE FOR THE NEW SYSTEM WHEN A DIFFERENCE WAS FOUND WITH THE PREVIOUS ONE, EXCEPT OVER THE ATLANTIC REGION WHERE PREFERENCE WAS CLEARLY IN FAVOR OF THE NEW SYSTEM. 7. AVAILABILITY OF PRODUCTS NO NEW ANALYSIS OR FORECAST PRODUCTS ACCOMPANY THIS UPGRADE OF THE GDPS. THE INCREASE IN RESOLUTION IN BOTH THE DATA ASSIMILATION AND FORECAST COMPONENTS OF THE SYSTEM ARE MORE DEMANDING IN COMPUTER RESOURCES, SO TO ENSURE THE AVAILABILITY OF MOST PRODUCTS AT THE SAME TIME THAN WITH THE SYSTEM BEING REPLACED, THE DATA ACQUISITION CUT-OFF TIME HAS BEEN BROUGHT BACK TO 3 HOUR 10 MINUTES, A TIME SIMILAR TO THAT IN USE PRIOR TO THE MOST RECENT SUPERCOMPUTER UPGRADE. ONGOING NUMERICAL CODE OPTIMIZATION COMBINED WITH PROGRAMMED INCREASES IN COMPUTING CAPACITY WILL ALLOW US TO CONTINUE TO EITHER PROVIDE PRODUCTS AT AN EARLIER TIME OR BRING AGAIN A LONGER CUT-OFF TIME. THE SCRIBE SYSTEM OUTPUT DELIVERED TO THE MSC REGIONAL PREDICTION CENTRES WILL CONTINUE TO BE AVAILABLE AT THE SAME TIME. SOME DATA FILES IN GRIB FORMAT SENT TO THE PUBLIC DATAMART WILL BE AVAILABLE APPROXIMATELY 15 MINUTES LATER. FOR MORE DETAILS PLEASE REFER TO THE TECHNICAL NOTE AVAILABLE VIA THE FOLLOWING AT THE ENTRY THERE REFERRING TO THE GDPS-3.0.0 IMPLEMENTATION (THE LINK MUST BE TYPED IN LOWERCASE) AT: HTTP://COLLABORATION.CMC.EC.GC.CA/CMC/CMOI/PRODUCT_GUIDE/DOCS/CHANG ES_E.HTML FOR QUESTIONS REGARDING THE NEW GDPS-3.0.0 AND ITS ASSOCIATED OUTPUT AND PRODUCTS, OR OTHER SPECIFIC QUESTIONS CONCERNING THIS OPERATIONAL IMPLEMENTATION, YOU CAN WRITE TO (USING LOWER CASE): PRODUCTION-INFO(AT)CMC.EC.GC.CA GRIMES / ADMA-MSC / SMA-SMC OTTAWA END