{ "title": "Same-cycle HRDPS West1km versus operational2.5km diagnostic", "retrieved": "2026-09-05", "initializationUtc": "2026-09-05T00:00:00Z", "validTimeRangeUtc": [ "2026-09-05T01:00:00Z", "2026-09-05T06:00:00Z" ], "selection": "Sept2 West files were not listed in available00/12routes. Current00route listed Sept5 cycle;12route empty. Six common complete station hours selected before inspecting forecast errors. Does not compare skill across dates.", "modelDescriptions": { "west1km": "Experimental HRDPS West,1km,not just operational2.5km resampled", "operational2p5km": "Operational continental HRDPS2.5km" }, "stations": [ { "id": "10476F0", "name": "Squamish Airport", "lat": 49.7832083333, "lon": -123.1611944444, "stationElevationM": 53.7 }, { "id": "10459NN", "name": "Pam Rocks", "lat": 49.4877802778, "lon": -123.2994527778, "stationElevationM": 7.1 }, { "id": "woodfibre_proxy", "name": "Woodfibre map proxy", "lat": 49.665252528, "lon": -123.254184806, "stationElevationM": null, "terrainReference": "Legacy CDEM point about9m; not a weather station or exact flare location" } ], "grids": { "west1km": { "gridType": "rotated_ll", "gridDefinitionTemplateNumber": 1, "Ni": 1330, "Nj": 1180, "latitudeOfSouthernPoleInDegrees": -33.443381, "longitudeOfSouthernPoleInDegrees": 266.463574, "angleOfRotationInDegrees": 0.0, "uvRelativeToGrid": 1, "iScansNegatively": 0, "jScansPositively": 1, "jPointsAreConsecutive": 0, "latitudeOfFirstGridPointInDegrees": -5.29511, "longitudeOfFirstGridPointInDegrees": 337.819605, "iDirectionIncrementInDegrees": 0.00899, "jDirectionIncrementInDegrees": 0.00899, "shapeOfTheEarth": 6, "radius": 6371229 }, "operational2p5km": { "gridType": "rotated_ll", "gridDefinitionTemplateNumber": 1, "Ni": 2540, "Nj": 1290, "latitudeOfSouthernPoleInDegrees": -36.08852, "longitudeOfSouthernPoleInDegrees": 245.305142, "angleOfRotationInDegrees": 0.0, "uvRelativeToGrid": 1, "iScansNegatively": 0, "jScansPositively": 1, "jPointsAreConsecutive": 0, "latitudeOfFirstGridPointInDegrees": -12.302501, "longitudeOfFirstGridPointInDegrees": 345.17878, "iDirectionIncrementInDegrees": 0.0225, "jDirectionIncrementInDegrees": 0.0225, "shapeOfTheEarth": 6, "radius": 6371229 } }, "nativePointMetadata": { "west1km": [ { "lat": 49.781208, "lon": -123.166024, "distance": 0.41184503373317616, "index": 380774, "modelOrographyM": 53.0, "stationId": "10476F0", "rotationCoefficients": [ 0.9107302433724301, 0.4130017237334418 ], "surroundingNativeOrographyPoints": [ { "lat": 49.793104, "lon": -123.159104, "value": 73.0, "distance": 1.1104192577866634, "index": 382105 }, { "lat": 49.789392, "lon": -123.171768, "value": 50.0, "distance": 1.0245772830217266, "index": 382104 }, { "lat": 49.784916, "lon": -123.153352, "value": 87.0, "distance": 0.5940431636650315, "index": 380775 }, { "lat": 49.781208, "lon": -123.166024, "value": 53.0, "distance": 0.41184503373317616, "index": 380774 } ] }, { "lat": 49.486672, "lon": -123.294312, "distance": 0.3911733404427048, "index": 346172, "modelOrographyM": 0.0, "stationId": "10459NN", "rotationCoefficients": [ 0.90995340763144, 0.41471049653936964 ], "surroundingNativeOrographyPoints": [ { "lat": 49.494852, "lon": -123.300056, "value": 0.0, "distance": 0.7875241508395412, "index": 347502 }, { "lat": 49.491128, "lon": -123.312632, "value": 4.0, "distance": 1.0220305587057632, "index": 347501 }, { "lat": 49.486672, "lon": -123.294312, "value": 0.0, "distance": 0.3911733404427048, "index": 346172 }, { "lat": 49.482948, "lon": -123.306888, "value": 4.0, "distance": 0.7598455850559142, "index": 346171 } ] }, { "lat": 49.666688, "lon": -123.253368, "distance": 0.1702201567665504, "index": 368793, "modelOrographyM": 135.0, "stationId": "woodfibre_proxy", "rotationCoefficients": [ 0.910214814254479, 0.41413644117812665 ], "surroundingNativeOrographyPoints": [ { "lat": 49.666688, "lon": -123.253368, "value": 135.0, "distance": 0.1702201567665504, "index": 368793 }, { "lat": 49.662972, "lon": -123.266, "value": 252.0, "distance": 0.8873322478777848, "index": 368792 }, { "lat": 49.658508, "lon": -123.247624, "value": 33.0, "distance": 0.8865152340319117, "index": 367463 }, { "lat": 49.654788, "lon": -123.260248, "value": 148.0, "distance": 1.2426934610857685, "index": 367462 } ] } ], "operational2p5km": [ { "lat": 49.788064, "lon": -123.15312, "distance": 0.7924055638225855, "index": 960536, "modelOrographyM": 107.31789599609375, "stationId": "10476F0", "rotationCoefficients": [ 0.9928792325737787, 0.11912526819992514 ], "surroundingNativeOrographyPoints": [ { "lat": 49.788064, "lon": -123.15312, "value": 107.31789599609375, "distance": 0.7924055638225855, "index": 960536 }, { "lat": 49.785384, "lon": -123.18764, "value": 330.61839599609374, "distance": 1.9141888047711348, "index": 960535 }, { "lat": 49.765724, "lon": -123.148968, "value": 83.65839599609374, "distance": 2.133241359996878, "index": 957996 }, { "lat": 49.763048, "lon": -123.183472, "value": 433.82289599609373, "distance": 2.7544240014926404, "index": 957995 } ] }, { "lat": 49.481496, "lon": -123.305272, "distance": 0.8154363376070166, "index": 927510, "modelOrographyM": 3.0468959960937503, "stationId": "10459NN", "rotationCoefficients": [ 0.9926165241601304, 0.12129483074006583 ], "surroundingNativeOrographyPoints": [ { "lat": 49.506548, "lon": -123.275168, "value": 169.00889599609374, "distance": 2.7261872678059333, "index": 930051 }, { "lat": 49.503828, "lon": -123.309472, "value": 1.40039599609375, "distance": 1.9257586209232975, "index": 930050 }, { "lat": 49.484212, "lon": -123.270976, "value": 0.12789599609375, "distance": 2.09484673919347, "index": 927511 }, { "lat": 49.481496, "lon": -123.305272, "value": 3.0468959960937503, "distance": 0.8154363376070166, "index": 927510 } ] }, { "lat": 49.665604, "lon": -123.270152, "distance": 1.1497198293082485, "index": 947832, "modelOrographyM": 568.3948959960937, "stationId": "woodfibre_proxy", "rotationCoefficients": [ 0.992679631914293, 0.12077726765622604 ], "surroundingNativeOrographyPoints": [ { "lat": 49.668312, "lon": -123.23572, "value": 263.75939599609376, "distance": 1.3717823459894452, "index": 947833 }, { "lat": 49.665604, "lon": -123.270152, "value": 568.3948959960937, "distance": 1.1497198293082485, "index": 947832 }, { "lat": 49.645976, "lon": -123.231536, "value": 96.28789599609375, "distance": 2.693101293154268, "index": 945293 }, { "lat": 49.643272, "lon": -123.265952, "value": 404.88289599609374, "distance": 2.587059822139244, "index": 945292 } ] } ] }, "observations": { "retainedRecords": 12, "matchedModelPairs": 24, "flags": "All retained TEMP/WIND_SPEED/WIND_DIRECTION values present and flags null; recent observations may be revised.", "queryDatetimeLiteral": "2026-09-04T16:00:00Z/2026-09-05T04:00:00Z", "interpretation": "Query returned local-date-valued rows; exact UTC_DATE values,not URL literals,were joined. Verified UTC_DATE=LOCAL_DATE+8h; retained01..06UTC for both models.", "forecastSupport": "GRIB stepType=instant; not hour-average fields.", "windObservationSupport": "Exact station-specific2/10minute near-hour averaging configuration unresolved; not treated as full-hour mean.", "files": [ { "file": "airport-sept5-climate.json", "sha256": "13136cedbf4d5e3fb725ed3066bc2760d73053ac766950c8387fbc1942c0edb8", "url": "https://api.weather.gc.ca/collections/climate-hourly/items?f=json&limit=24&CLIMATE_IDENTIFIER=10476F0&datetime=2026-09-04T16:00:00Z/2026-09-05T04:00:00Z" }, { "file": "pamrocks-sept5-climate.json", "sha256": "c52bde9c0405c34c19929029031aaa2cfafb0f0a87d26bd867ed270404070425", "url": "https://api.weather.gc.ca/collections/climate-hourly/items?f=json&limit=24&CLIMATE_IDENTIFIER=10459NN&datetime=2026-09-04T16:00:00Z/2026-09-05T04:00:00Z" } ] }, "windRotation": { "method": "Use each models own GRIB pole. Northpole P is antipode of southern pole; gridEast=normalize(P cross r). For coefficients(a,b)in true east/north,ue=a*ug-b*vg,vn=b*ug+a*vg. Wind-from is atan2(-ue,-vn)mod360.", "gridSpecific": true, "directionCheckRule": "Direction agreement scored only where derived and published speed≥1m/s; all weak-wind check differences retained separately.", "strongDirectionChecks": 13, "maxAbsoluteDirectionDifferenceAtLeast1MsDeg": 0.5592235493457451, "publishedChecks": [ { "model": "west1km", "stationId": "10476F0", "leadHours": 1, "derivedDirectionDeg": 311.7832485970665, "publishedDirectionDeg": 311.6, "directionDifferenceDeg": 0.18324859706649477, "derivedSpeedMs": 2.3755987577791036, "publishedSpeedMs": 2.376510262489319, "speedDifferenceMs": -0.0009115047102152829 }, { "model": "west1km", "stationId": "10459NN", "leadHours": 1, "derivedDirectionDeg": 239.32326926043754, "publishedDirectionDeg": 239.10000000000002, "directionDifferenceDeg": 0.22326926043751882, "derivedSpeedMs": 1.0858436222698549, "publishedSpeedMs": 1.0865102624893188, "speedDifferenceMs": -0.0006666402194639431 }, { "model": "west1km", "stationId": "woodfibre_proxy", "leadHours": 1, "derivedDirectionDeg": 82.09977378350611, "publishedDirectionDeg": 82.4, "directionDifferenceDeg": -0.3002262164939111, "derivedSpeedMs": 1.3567658419043773, "publishedSpeedMs": 1.3465102624893188, "speedDifferenceMs": 0.010255579415058502 }, { "model": "west1km", "stationId": "10476F0", "leadHours": 3, "derivedDirectionDeg": 313.04398711007354, "publishedDirectionDeg": 312.8, "directionDifferenceDeg": 0.24398711007353313, "derivedSpeedMs": 1.4464907346519214, "publishedSpeedMs": 1.441258344501257, "speedDifferenceMs": 0.0052323901506643455 }, { "model": "west1km", "stationId": "10459NN", "leadHours": 3, "derivedDirectionDeg": 349.15602952924905, "publishedDirectionDeg": 349.1, "directionDifferenceDeg": 0.05602952924903093, "derivedSpeedMs": 0.762332922988977, "publishedSpeedMs": 0.756258344501257, "speedDifferenceMs": 0.006074578487720084 }, { "model": "west1km", "stationId": "woodfibre_proxy", "leadHours": 3, "derivedDirectionDeg": 337.1627937885864, "publishedDirectionDeg": 336.0, "directionDifferenceDeg": 1.1627937885863844, "derivedSpeedMs": 0.17584976754706, "publishedSpeedMs": 0.17125834450125696, "speedDifferenceMs": 0.004591423045803039 }, { "model": "west1km", "stationId": "10476F0", "leadHours": 6, "derivedDirectionDeg": 326.7777403161986, "publishedDirectionDeg": 326.8, "directionDifferenceDeg": -0.022259683801394203, "derivedSpeedMs": 2.6344489515000062, "publishedSpeedMs": 2.6301950200088324, "speedDifferenceMs": 0.004253931491173812 }, { "model": "west1km", "stationId": "10459NN", "leadHours": 6, "derivedDirectionDeg": 2.08136045341945, "publishedDirectionDeg": 2.0, "directionDifferenceDeg": 0.08136045341944964, "derivedSpeedMs": 4.549115643552168, "publishedSpeedMs": 4.540195020008833, "speedDifferenceMs": 0.008920623543335005 }, { "model": "west1km", "stationId": "woodfibre_proxy", "leadHours": 6, "derivedDirectionDeg": 59.763836588700165, "publishedDirectionDeg": 60.0, "directionDifferenceDeg": -0.23616341129982743, "derivedSpeedMs": 0.6288490375629573, "publishedSpeedMs": 0.6251950200088322, "speedDifferenceMs": 0.0036540175541250886 }, { "model": "operational2p5km", "stationId": "10476F0", "leadHours": 1, "derivedDirectionDeg": 332.04147331243234, "publishedDirectionDeg": 331.5, "directionDifferenceDeg": 0.5414733124323448, "derivedSpeedMs": 1.5543809056984714, "publishedSpeedMs": 1.5462043032050132, "speedDifferenceMs": 0.008176602493458196 }, { "model": "operational2p5km", "stationId": "10459NN", "leadHours": 1, "derivedDirectionDeg": 296.72323070244715, "publishedDirectionDeg": 294.0, "directionDifferenceDeg": 2.723230702447154, "derivedSpeedMs": 0.25238858928247926, "publishedSpeedMs": 0.2562043032050133, "speedDifferenceMs": -0.0038157139225340475 }, { "model": "operational2p5km", "stationId": "woodfibre_proxy", "leadHours": 1, "derivedDirectionDeg": 50.305368184922564, "publishedDirectionDeg": 50.0, "directionDifferenceDeg": 0.3053681849225711, "derivedSpeedMs": 1.5339491516996253, "publishedSpeedMs": 1.5212043032050133, "speedDifferenceMs": 0.012744848494611993 }, { "model": "operational2p5km", "stationId": "10476F0", "leadHours": 3, "derivedDirectionDeg": 329.408883484029, "publishedDirectionDeg": 329.20000000000005, "directionDifferenceDeg": 0.20888348402894508, "derivedSpeedMs": 1.3656500283747663, "publishedSpeedMs": 1.3613560053706169, "speedDifferenceMs": 0.004294023004149494 }, { "model": "operational2p5km", "stationId": "10459NN", "leadHours": 3, "derivedDirectionDeg": 286.05865518499536, "publishedDirectionDeg": 284.8, "directionDifferenceDeg": 1.258655184995348, "derivedSpeedMs": 0.43462627624201455, "publishedSpeedMs": 0.4363560053706169, "speedDifferenceMs": -0.0017297291286023642 }, { "model": "operational2p5km", "stationId": "woodfibre_proxy", "leadHours": 3, "derivedDirectionDeg": 12.939909180651432, "publishedDirectionDeg": 12.600000000000001, "directionDifferenceDeg": 0.33990918065143205, "derivedSpeedMs": 1.3823530663329102, "publishedSpeedMs": 1.3613560053706169, "speedDifferenceMs": 0.020997060962293368 }, { "model": "operational2p5km", "stationId": "10476F0", "leadHours": 6, "derivedDirectionDeg": 323.4592235493458, "publishedDirectionDeg": 322.90000000000003, "directionDifferenceDeg": 0.5592235493457451, "derivedSpeedMs": 1.554155719353759, "publishedSpeedMs": 1.55, "speedDifferenceMs": 0.004155719353758913 }, { "model": "operational2p5km", "stationId": "10459NN", "leadHours": 6, "derivedDirectionDeg": 338.8608254763354, "publishedDirectionDeg": 338.8, "directionDifferenceDeg": 0.06082547633536706, "derivedSpeedMs": 2.0421557237390098, "publishedSpeedMs": 2.04, "speedDifferenceMs": 0.0021557237390097406 }, { "model": "operational2p5km", "stationId": "woodfibre_proxy", "leadHours": 6, "derivedDirectionDeg": 3.2287318655908104, "publishedDirectionDeg": 2.9000000000000004, "directionDifferenceDeg": 0.3287318655908109, "derivedSpeedMs": 1.4731259280862585, "publishedSpeedMs": 1.47, "speedDifferenceMs": 0.003125928086258556 } ], "maxAbsoluteDirectionDifferenceDeg": 2.723230702447154, "maxAbsoluteSpeedDifferenceMs": 0.020997060962293368 }, "comparisonMethod": "Nearest native grid points,without interpolation,station elevation correction,bias adjustment,downscaling or model tuning. Direction uses shared hours where observation and both model speeds≥1m/s; speed/temp/vector metrics use all6hours.", "scores": [ { "model": "west1km", "stationId": "10476F0", "stationName": "Squamish Airport", "n": 6, "temperatureC": { "n": 6, "bias": 0.7516666666666895, "mae": 0.7516666666666895, "rmse": 0.7713300201600055 }, "windSpeedMs": { "n": 6, "bias": 0.9538556290596195, "mae": 1.1577684137144115, "rmse": 1.411282315702023 }, "vectorWindRmseMs": 1.5436590044832155, "directionMAEDegCommonHours": 20.40638992196918, "commonDirectionHours": 4 }, { "model": "west1km", "stationId": "10459NN", "stationName": "Pam Rocks", "n": 6, "temperatureC": { "n": 6, "bias": 0.23833333333336112, "mae": 0.36833333333335655, "rmse": 0.4095322535120781 }, "windSpeedMs": { "n": 6, "bias": -5.34906472667804, "mae": 5.743679337695696, "rmse": 6.817872537226782 }, "vectorWindRmseMs": 7.092727299411484, "directionMAEDegCommonHours": 25.33003406533942, "commonDirectionHours": 2 }, { "model": "operational2p5km", "stationId": "10476F0", "stationName": "Squamish Airport", "n": 6, "temperatureC": { "n": 6, "bias": 0.18050000000002875, "mae": 0.1911666666666824, "rmse": 0.22924186644969818 }, "windSpeedMs": { "n": 6, "bias": 0.30577899971493794, "mae": 0.7920988732154223, "rmse": 1.068851816123897 }, "vectorWindRmseMs": 1.1475629436387296, "directionMAEDegCommonHours": 13.362538431132862, "commonDirectionHours": 4 }, { "model": "operational2p5km", "stationId": "10459NN", "stationName": "Pam Rocks", "n": 6, "temperatureC": { "n": 6, "bias": 0.3961666666666949, "mae": 0.5295000000000206, "rmse": 0.5688258374347638 }, "windSpeedMs": { "n": 6, "bias": -5.948231729660584, "mae": 6.062005384099758, "rmse": 7.139618492865247 }, "vectorWindRmseMs": 7.512524948365752, "directionMAEDegCommonHours": 36.47920830071058, "commonDirectionHours": 2 } ], "profiles": [ { "model": "west1km", "stationId": "10476F0", "validUtc": "2026-09-05T06:00:00Z", "pressureHpa": 985, "temperatureC": 14.770000000000039, "heightGeopotentialMetres": 269.7222412109375, "modelOrographyM": 53.0, "heightAboveModelOrographyApproxM": 216.7222412109375, "modelSurfacePressurePa": 101044.828125, "aboveModelSurface": true, "eastUMs": 1.8436051211523907, "northVMs": -3.171145509815887, "windSpeedMs": 3.6681117331898148, "windFromTrueDeg": 329.82761600891314 }, { "model": "west1km", "stationId": "10476F0", "validUtc": "2026-09-05T06:00:00Z", "pressureHpa": 950, "temperatureC": 12.620410156250045, "heightGeopotentialMetres": 574.90283203125, "modelOrographyM": 53.0, "heightAboveModelOrographyApproxM": 521.90283203125, "modelSurfacePressurePa": 101044.828125, "aboveModelSurface": true, "eastUMs": 1.2062678792241066, "northVMs": -2.5405372423798087, "windSpeedMs": 2.812367628238994, "windFromTrueDeg": 334.60124952494186 }, { "model": "west1km", "stationId": "10459NN", "validUtc": "2026-09-05T06:00:00Z", "pressureHpa": 985, "temperatureC": 15.79000000000002, "heightGeopotentialMetres": 262.8472412109375, "modelOrographyM": 0.0, "heightAboveModelOrographyApproxM": 262.8472412109375, "modelSurfacePressurePa": 101588.828125, "aboveModelSurface": true, "eastUMs": -0.9456354649613643, "northVMs": -5.293276697100964, "windSpeedMs": 5.377081422543719, "windFromTrueDeg": 10.128946001094375 }, { "model": "west1km", "stationId": "10459NN", "validUtc": "2026-09-05T06:00:00Z", "pressureHpa": 950, "temperatureC": 14.065410156250039, "heightGeopotentialMetres": 569.27783203125, "modelOrographyM": 0.0, "heightAboveModelOrographyApproxM": 569.27783203125, "modelSurfacePressurePa": 101588.828125, "aboveModelSurface": true, "eastUMs": -0.1683311947968178, "northVMs": -3.622980583601116, "windSpeedMs": 3.626888983728673, "windFromTrueDeg": 2.660167703278232 }, { "model": "west1km", "stationId": "woodfibre_proxy", "validUtc": "2026-09-05T06:00:00Z", "pressureHpa": 985, "temperatureC": 15.590000000000032, "heightGeopotentialMetres": 266.94724121093753, "modelOrographyM": 135.0, "heightAboveModelOrographyApproxM": 131.94724121093753, "modelSurfacePressurePa": 100020.828125, "aboveModelSurface": true, "eastUMs": -1.3711267596810701, "northVMs": -0.5738247316156497, "windSpeedMs": 1.4863591133125547, "windFromTrueDeg": 67.29039890619502 }, { "model": "west1km", "stationId": "woodfibre_proxy", "validUtc": "2026-09-05T06:00:00Z", "pressureHpa": 950, "temperatureC": 13.500410156250041, "heightGeopotentialMetres": 572.92783203125, "modelOrographyM": 135.0, "heightAboveModelOrographyApproxM": 437.92783203125, "modelSurfacePressurePa": 100020.828125, "aboveModelSurface": true, "eastUMs": -1.677929442777699, "northVMs": -1.831245236102106, "windSpeedMs": 2.483728312373746, "windFromTrueDeg": 42.49833910969746 }, { "model": "operational2p5km", "stationId": "10476F0", "validUtc": "2026-09-05T06:00:00Z", "pressureHpa": 985, "temperatureC": 14.548000000000002, "heightGeopotentialMetres": 271.0, "modelOrographyM": 107.31789599609375, "heightAboveModelOrographyApproxM": 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