{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:56.261198", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2025-Apr-29_to_2025-May-03_237.0_56.5"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2025040002792}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "April 29 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 03 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Heat wave"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 133717.29148992637}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["Canada"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": []}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 56.5}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 237.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "237.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 231.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 241.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 54.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 60.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-128.2, 60.13], [-128.03, 60.53], [-127.5, 60.75], [-127.25, 60.65], [-127.0, 60.75], [-126.75, 60.65], [-126.5, 60.75], [-125.97, 60.53], [-125.82, 60.18], [-125.75, 60.15], [-125.5, 60.25], [-125.25, 60.15], [-125.0, 60.25], [-124.75, 60.15], [-124.5, 60.25], [-123.97, 60.03], [-123.75, 59.5], [-123.85, 59.25], [-123.82, 59.18], [-123.47, 59.03], [-123.32, 58.68], [-123.25, 58.65], [-123.0, 58.75], [-122.75, 58.65], [-122.5, 58.75], [-121.97, 58.53], [-121.82, 58.18], [-121.47, 58.03], [-121.32, 57.68], [-120.97, 57.53], [-120.75, 57.0], [-120.85, 56.75], [-120.82, 56.68], [-120.5, 56.54], [-120.0, 56.75], [-119.75, 56.65], [-119.5, 56.75], [-119.25, 56.65], [-119.0, 56.75], [-118.47, 56.53], [-118.25, 56.0], [-118.46, 55.5], [-118.25, 55.0], [-118.47, 54.47], [-119.0, 54.25], [-119.25, 54.35], [-119.32, 54.32], [-119.47, 53.97], [-120.0, 53.75], [-120.53, 53.97], [-120.68, 54.32], [-120.75, 54.35], [-121.0, 54.25], [-121.53, 54.47], [-121.68, 54.82], [-121.75, 54.85], [-121.87, 54.8], [-121.75, 54.5], [-121.97, 53.97], [-122.5, 53.75], [-123.03, 53.97], [-123.18, 54.32], [-123.25, 54.35], [-123.5, 54.25], [-123.75, 54.35], [-124.0, 54.25], [-124.25, 54.35], [-124.5, 54.25], [-124.75, 54.35], [-125.0, 54.25], [-125.25, 54.35], [-125.5, 54.25], [-126.03, 54.47], [-126.18, 54.82], [-126.25, 54.85], [-126.5, 54.75], [-127.03, 54.97], [-127.25, 55.5], [-127.03, 56.03], [-126.5, 56.25], [-126.25, 56.15], [-126.18, 56.18], [-126.15, 56.25], [-126.25, 56.5], [-126.15, 56.75], [-126.25, 57.0], [-126.15, 57.25], [-126.25, 57.5], [-126.03, 58.03], [-125.5, 58.25], [-124.97, 58.03], [-124.82, 57.68], [-124.75, 57.65], [-124.62, 57.7], [-124.75, 58.0], [-124.65, 58.25], [-124.68, 58.32], [-124.75, 58.35], [-125.0, 58.25], [-125.53, 58.47], [-125.68, 58.82], [-125.75, 58.85], [-126.0, 58.75], [-126.25, 58.85], [-126.32, 58.82], [-126.47, 58.47], [-127.0, 58.25], [-127.25, 58.35], [-127.5, 58.25], [-127.75, 58.35], [-128.0, 58.25], [-128.53, 58.47], [-128.68, 58.82], [-129.03, 58.97], [-129.25, 59.5], [-129.03, 60.03], [-128.5, 60.25], [-128.2, 60.13]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-04-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.75, 57.0], [-123.53, 57.53], [-123.0, 57.75], [-122.47, 57.53], [-122.32, 57.18], [-121.97, 57.03], [-121.75, 56.5], [-121.97, 55.97], [-122.5, 55.75], [-122.75, 55.85], [-123.0, 55.75], [-123.53, 55.97], [-123.75, 56.5], [-123.65, 56.75], [-123.75, 57.0]]]]}, "2025-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.53, 57.53], [-123.0, 57.75], [-122.47, 57.53], [-122.32, 57.18], [-121.97, 57.03], [-121.75, 56.5], [-121.97, 55.97], [-122.5, 55.75], [-122.75, 55.85], [-123.0, 55.75], [-123.53, 55.97], [-123.75, 56.5], [-123.65, 56.75], [-123.75, 57.0], [-123.53, 57.53]]], [[[-125.53, 60.03], [-125.0, 60.25], [-124.75, 60.15], [-124.5, 60.25], [-123.97, 60.03], [-123.75, 59.5], [-123.85, 59.25], [-123.75, 59.0], [-123.97, 58.47], [-124.5, 58.25], [-124.75, 58.35], [-125.0, 58.25], [-125.53, 58.47], [-125.75, 59.0], [-125.65, 59.25], [-125.75, 59.5], [-125.53, 60.03]]]]}, "2025-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-129.03, 58.97], [-129.25, 59.5], [-129.03, 60.03], [-128.5, 60.25], [-128.2, 60.13], [-128.03, 60.53], [-127.5, 60.75], [-127.25, 60.65], [-127.0, 60.75], [-126.75, 60.65], [-126.5, 60.75], [-125.97, 60.53], [-125.82, 60.18], [-125.75, 60.15], [-125.5, 60.25], [-125.25, 60.15], [-125.0, 60.25], [-124.75, 60.15], [-124.5, 60.25], [-123.97, 60.03], [-123.75, 59.5], [-123.85, 59.25], [-123.82, 59.18], [-123.47, 59.03], [-123.32, 58.68], [-123.25, 58.65], [-123.0, 58.75], [-122.75, 58.65], [-122.5, 58.75], [-121.97, 58.53], [-121.82, 58.18], [-121.47, 58.03], [-121.32, 57.68], [-120.97, 57.53], [-120.75, 57.0], [-120.85, 56.75], [-120.82, 56.68], [-120.5, 56.54], [-120.0, 56.75], [-119.75, 56.65], [-119.5, 56.75], [-119.25, 56.65], [-119.0, 56.75], [-118.47, 56.53], [-118.25, 56.0], [-118.46000000000001, 55.5], [-118.25, 55.0], [-118.47, 54.47], [-119.0, 54.25], [-119.25, 54.35], [-119.32, 54.32], [-119.47, 53.97], [-120.0, 53.75], [-120.53, 53.97], [-120.68, 54.32], [-120.75, 54.35], [-121.0, 54.25], [-121.53, 54.47], [-121.68, 54.82], [-121.75, 54.85], [-121.87, 54.8], [-121.75, 54.5], [-121.97, 53.97], [-122.5, 53.75], [-123.03, 53.97], [-123.18, 54.32], [-123.25, 54.35], [-123.5, 54.25], [-123.75, 54.35], [-124.0, 54.25], [-124.25, 54.35], [-124.5, 54.25], [-124.75, 54.35], [-125.0, 54.25], [-125.25, 54.35], [-125.5, 54.25], [-126.03, 54.47], [-126.18, 54.82], [-126.25, 54.85], [-126.5, 54.75], [-127.03, 54.97], [-127.25, 55.5], [-127.03, 56.03], [-126.5, 56.25], [-126.25, 56.15], [-126.18, 56.18], [-126.15, 56.25], [-126.25, 56.5], [-126.15, 56.75], [-126.25, 57.0], [-126.15, 57.25], [-126.25, 57.5], [-126.03, 58.03], [-125.5, 58.25], [-124.97, 58.03], [-124.82, 57.68], [-124.75, 57.65], [-124.62, 57.7], [-124.75, 58.0], [-124.65, 58.25], [-124.68, 58.32], [-124.75, 58.35], [-125.0, 58.25], [-125.53, 58.47], [-125.68, 58.82], [-125.75, 58.85], [-126.0, 58.75], [-126.25, 58.85], [-126.32, 58.82], [-126.47, 58.47], [-127.0, 58.25], [-127.25, 58.35], [-127.5, 58.25], [-127.75, 58.35], [-128.0, 58.25], [-128.53, 58.47], [-128.68, 58.82], [-129.03, 58.97]]]]}, "2025-05-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-129.03, 58.97], [-129.25, 59.5], [-129.03, 60.03], [-128.5, 60.25], [-128.2, 60.13], [-128.03, 60.53], [-127.5, 60.75], [-127.25, 60.65], [-127.0, 60.75], [-126.75, 60.65], [-126.5, 60.75], [-125.97, 60.53], [-125.82, 60.18], [-125.75, 60.15], [-125.5, 60.25], [-125.25, 60.15], [-125.0, 60.25], [-124.75, 60.15], [-124.5, 60.25], [-123.97, 60.03], [-123.75, 59.5], [-123.85, 59.25], [-123.82, 59.18], [-123.47, 59.03], [-123.32, 58.68], [-123.25, 58.65], [-123.0, 58.75], [-122.75, 58.65], [-122.5, 58.75], [-121.97, 58.53], [-121.82, 58.18], [-121.47, 58.03], [-121.32, 57.68], [-120.97, 57.53], [-120.75, 57.0], [-120.85, 56.75], [-120.82, 56.68], [-120.5, 56.54], [-120.0, 56.75], [-119.75, 56.65], [-119.5, 56.75], [-119.25, 56.65], [-119.0, 56.75], [-118.47, 56.53], [-118.25, 56.0], [-118.46000000000001, 55.5], [-118.25, 55.0], [-118.47, 54.47], [-119.0, 54.25], [-119.25, 54.35], [-119.32, 54.32], [-119.47, 53.97], [-120.0, 53.75], [-120.53, 53.97], [-120.68, 54.32], [-120.75, 54.35], [-121.0, 54.25], [-121.53, 54.47], [-121.68, 54.82], [-121.75, 54.85], [-121.87, 54.8], [-121.75, 54.5], [-121.97, 53.97], [-122.5, 53.75], [-123.03, 53.97], [-123.18, 54.32], [-123.25, 54.35], [-123.5, 54.25], [-123.75, 54.35], [-124.0, 54.25], [-124.25, 54.35], [-124.5, 54.25], [-124.75, 54.35], [-125.0, 54.25], [-125.25, 54.35], [-125.5, 54.25], [-126.03, 54.47], [-126.18, 54.82], [-126.25, 54.85], [-126.5, 54.75], [-127.03, 54.97], [-127.25, 55.5], [-127.03, 56.03], [-126.5, 56.25], [-126.25, 56.15], [-126.18, 56.18], [-126.15, 56.25], [-126.25, 56.5], [-126.15, 56.75], [-126.25, 57.0], [-126.15, 57.25], [-126.25, 57.5], [-126.03, 58.03], [-125.5, 58.25], [-124.97, 58.03], [-124.82, 57.68], [-124.75, 57.65], [-124.62, 57.7], [-124.75, 58.0], [-124.65, 58.25], [-124.68, 58.32], [-124.75, 58.35], [-125.0, 58.25], [-125.53, 58.47], [-125.68, 58.82], [-125.75, 58.85], [-126.0, 58.75], [-126.25, 58.85], [-126.32, 58.82], [-126.47, 58.47], [-127.0, 58.25], [-127.25, 58.35], [-127.5, 58.25], [-127.75, 58.35], [-128.0, 58.25], [-128.53, 58.47], [-128.68, 58.82], [-129.03, 58.97]]]]}, "2025-05-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-129.03, 58.97], [-129.25, 59.5], [-129.03, 60.03], [-128.5, 60.25], [-128.2, 60.13], [-128.03, 60.53], [-127.5, 60.75], [-127.25, 60.65], [-127.0, 60.75], [-126.75, 60.65], [-126.5, 60.75], [-125.97, 60.53], [-125.82, 60.18], [-125.75, 60.15], [-125.5, 60.25], [-125.25, 60.15], [-125.0, 60.25], [-124.75, 60.15], [-124.5, 60.25], [-123.97, 60.03], [-123.75, 59.5], [-123.85, 59.25], [-123.82, 59.18], [-123.47, 59.03], [-123.32, 58.68], [-123.25, 58.65], [-123.0, 58.75], [-122.75, 58.65], [-122.5, 58.75], [-121.97, 58.53], [-121.82, 58.18], [-121.47, 58.03], [-121.32, 57.68], [-120.97, 57.53], [-120.75, 57.0], [-120.85, 56.75], [-120.82, 56.68], [-120.5, 56.54], [-120.0, 56.75], [-119.75, 56.65], [-119.5, 56.75], [-119.25, 56.65], [-119.0, 56.75], [-118.47, 56.53], [-118.25, 56.0], [-118.46000000000001, 55.5], [-118.25, 55.0], [-118.47, 54.47], [-119.0, 54.25], [-119.25, 54.35], [-119.32, 54.32], [-119.47, 53.97], [-120.0, 53.75], [-120.53, 53.97], [-120.68, 54.32], [-120.75, 54.35], [-121.0, 54.25], [-121.53, 54.47], [-121.68, 54.82], [-121.75, 54.85], [-121.87, 54.8], [-121.75, 54.5], [-121.97, 53.97], [-122.5, 53.75], [-123.03, 53.97], [-123.18, 54.32], [-123.25, 54.35], [-123.5, 54.25], [-123.75, 54.35], [-124.0, 54.25], [-124.25, 54.35], [-124.5, 54.25], [-124.75, 54.35], [-125.0, 54.25], [-125.25, 54.35], [-125.5, 54.25], [-126.03, 54.47], [-126.18, 54.82], [-126.25, 54.85], [-126.5, 54.75], [-127.03, 54.97], [-127.25, 55.5], [-127.03, 56.03], [-126.5, 56.25], [-126.25, 56.15], [-126.18, 56.18], [-126.15, 56.25], [-126.25, 56.5], [-126.15, 56.75], [-126.25, 57.0], [-126.15, 57.25], [-126.25, 57.5], [-126.03, 58.03], [-125.5, 58.25], [-124.97, 58.03], [-124.82, 57.68], [-124.75, 57.65], [-124.62, 57.7], [-124.75, 58.0], [-124.65, 58.25], [-124.68, 58.32], [-124.75, 58.35], [-125.0, 58.25], [-125.53, 58.47], [-125.68, 58.82], [-125.75, 58.85], [-126.0, 58.75], [-126.25, 58.85], [-126.32, 58.82], [-126.47, 58.47], [-127.0, 58.25], [-127.25, 58.35], [-127.5, 58.25], [-127.75, 58.35], [-128.0, 58.25], [-128.53, 58.47], [-128.68, 58.82], [-129.03, 58.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 9.381705599248619}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 5.799031652513104}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [6.72422815958663, 7.1103489103771835, 8.473775868476196, 11.491634027666237, 10.422822087927784]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.356633758544945, 8.967794036865257, 12.235219573974632, 16.309166208903036, 16.95935974121096]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [3.821070683149685, 3.565058503605339, 4.285778101843685, 7.266439531792886, 6.117936753655211]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [3.9541566925088887, 3.7984307525165946, 5.583186850313211, 9.001106392874306, 9.381705599248619]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.4350256509047188, 1.1642986497184136, 1.404033735093071, 2.183447578724307, 1.6967997557527468]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.4479737730634257, 1.2738717754581097, 2.292575201283959, 3.0752135107541902, 2.1343662440305735]}}