{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:06.036160", "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-Jan-02_to_2025-Jan-06_247.5_41.0"}, "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": 2025010001117}, "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": "January 02 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 06 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": 237048.12139979907}, "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": ["United States"]}, "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": 41.0}, "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": 247.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "247.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 242.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 251.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-118.0, 38.75], [-117.75, 38.65], [-117.5, 38.75], [-117.25, 38.65], [-117.0, 38.75], [-116.75, 38.65], [-116.68, 38.68], [-116.65, 38.75], [-116.75, 39.0], [-116.65, 39.25], [-116.68, 39.32], [-117.03, 39.47], [-117.18, 39.82], [-117.53, 39.97], [-117.68, 40.32], [-118.03, 40.47], [-118.25, 41.0], [-118.03, 41.53], [-117.5, 41.75], [-117.25, 41.65], [-117.0, 41.75], [-116.5, 41.54], [-116.0, 41.75], [-115.7, 41.63], [-115.62, 41.8], [-116.03, 41.97], [-116.18, 42.32], [-116.25, 42.35], [-116.5, 42.25], [-117.03, 42.47], [-117.18, 42.82], [-117.25, 42.85], [-117.5, 42.75], [-118.03, 42.97], [-118.25, 43.5], [-118.15, 43.75], [-118.25, 44.0], [-118.03, 44.53], [-117.5, 44.75], [-116.97, 44.53], [-116.82, 44.18], [-116.75, 44.15], [-116.5, 44.25], [-115.97, 44.03], [-115.82, 43.68], [-115.75, 43.65], [-115.5, 43.75], [-115.25, 43.65], [-115.0, 43.75], [-114.47, 43.53], [-114.32, 43.18], [-114.25, 43.15], [-114.0, 43.25], [-113.47, 43.03], [-113.25, 42.5], [-113.35, 42.25], [-113.32, 42.18], [-113.25, 42.15], [-113.0, 42.25], [-112.75, 42.15], [-112.5, 42.25], [-112.25, 42.15], [-112.0, 42.25], [-111.47, 42.03], [-111.32, 41.68], [-111.25, 41.65], [-111.0, 41.75], [-110.47, 41.53], [-110.32, 41.18], [-110.25, 41.15], [-110.0, 41.25], [-109.47, 41.03], [-109.32, 40.68], [-109.25, 40.65], [-109.0, 40.75], [-108.75, 40.65], [-108.5, 40.75], [-107.97, 40.53], [-107.75, 40.0], [-107.97, 39.47], [-108.5, 39.25], [-108.75, 39.35], [-109.0, 39.25], [-109.25, 39.35], [-109.5, 39.25], [-109.75, 39.35], [-110.0, 39.25], [-110.25, 39.35], [-110.32, 39.32], [-110.35, 39.25], [-110.25, 39.0], [-110.47, 38.47], [-110.82, 38.32], [-110.97, 37.97], [-111.32, 37.82], [-111.35, 37.75], [-111.25, 37.5], [-111.47, 36.97], [-111.82, 36.82], [-111.97, 36.47], [-112.5, 36.25], [-113.03, 36.47], [-113.18, 36.82], [-113.25, 36.85], [-113.5, 36.75], [-113.75, 36.85], [-114.0, 36.75], [-114.25, 36.85], [-114.5, 36.75], [-115.0, 36.96], [-115.5, 36.75], [-115.75, 36.85], [-116.0, 36.75], [-116.25, 36.85], [-116.5, 36.75], [-116.75, 36.85], [-117.0, 36.75], [-117.53, 36.97], [-117.68, 37.32], [-117.75, 37.35], [-118.0, 37.25], [-118.53, 37.47], [-118.75, 38.0], [-118.53, 38.53], [-118.0, 38.75]], [[-115.35, 38.75], [-115.32, 38.68], [-115.25, 38.65], [-115.18, 38.68], [-115.07, 38.93], [-115.32, 38.82], [-115.35, 38.75]], [[-115.12, 40.8], [-115.3, 40.88], [-115.47, 40.47], [-115.82, 40.32], [-115.85, 40.25], [-115.82, 40.18], [-115.75, 40.15], [-115.5, 40.25], [-115.2, 40.13], [-115.15, 40.25], [-115.25, 40.5], [-115.12, 40.8]], [[-114.68, 39.32], [-114.8, 39.38], [-114.93, 39.07], [-114.62, 39.2], [-114.68, 39.32]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-118.0, 37.25], [-118.53, 37.47], [-118.75, 38.0], [-118.53, 38.53], [-118.0, 38.75], [-117.75, 38.65], [-117.5, 38.75], [-117.25, 38.65], [-117.0, 38.75], [-116.75, 38.65], [-116.68, 38.68], [-116.65, 38.75], [-116.75, 39.0], [-116.65, 39.25], [-116.68, 39.32], [-117.03, 39.47], [-117.18, 39.82], [-117.53, 39.97], [-117.68, 40.32], [-118.03, 40.47], [-118.25, 41.0], [-118.03, 41.53], [-117.5, 41.75], [-117.25, 41.65], [-117.0, 41.75], [-116.5, 41.54], [-116.0, 41.75], [-115.69999999999999, 41.63], [-115.62, 41.8], [-116.03, 41.97], [-116.25, 42.5], [-116.03, 43.03], [-115.5, 43.25], [-115.25, 43.15], [-115.0, 43.25], [-114.75, 43.15], [-114.5, 43.25], [-114.25, 43.15], [-114.0, 43.25], [-113.47, 43.03], [-113.25, 42.5], [-113.35, 42.25], [-113.32, 42.18], [-113.25, 42.15], [-113.0, 42.25], [-112.75, 42.15], [-112.5, 42.25], [-112.25, 42.15], [-112.0, 42.25], [-111.47, 42.03], [-111.32, 41.68], [-111.25, 41.65], [-111.0, 41.75], [-110.47, 41.53], [-110.32, 41.18], [-110.25, 41.15], [-110.0, 41.25], [-109.47, 41.03], [-109.32, 40.68], [-109.25, 40.65], [-109.0, 40.75], [-108.75, 40.65], [-108.5, 40.75], [-107.97, 40.53], [-107.75, 40.0], [-107.97, 39.47], [-108.5, 39.25], [-108.75, 39.35], [-109.0, 39.25], [-109.25, 39.35], [-109.5, 39.25], [-109.75, 39.35], [-110.0, 39.25], [-110.25, 39.35], [-110.32, 39.32], [-110.35, 39.25], [-110.25, 39.0], [-110.47, 38.47], [-110.82, 38.32], [-110.97, 37.97], [-111.32, 37.82], [-111.35, 37.75], [-111.25, 37.5], [-111.47, 36.97], [-111.82, 36.82], [-111.97, 36.47], [-112.5, 36.25], [-113.03, 36.47], [-113.18, 36.82], [-113.25, 36.85], [-113.5, 36.75], [-113.75, 36.85], [-114.0, 36.75], [-114.25, 36.85], [-114.5, 36.75], [-115.0, 36.96], [-115.5, 36.75], [-115.75, 36.85], [-116.0, 36.75], [-116.25, 36.85], [-116.5, 36.75], [-116.75, 36.85], [-117.0, 36.75], [-117.53, 36.97], [-117.68, 37.32], [-117.75, 37.35], [-118.0, 37.25]], [[-115.25, 38.65], [-115.18, 38.68], [-115.07, 38.93], [-115.32, 38.82], [-115.35, 38.75], [-115.32, 38.68], [-115.25, 38.65]], [[-115.5, 40.25], [-115.19999999999999, 40.13], [-115.15, 40.25], [-115.25, 40.5], [-115.12, 40.8], [-115.30000000000001, 40.88], [-115.47, 40.47], [-115.82, 40.32], [-115.85, 40.25], [-115.82, 40.18], [-115.75, 40.15], [-115.5, 40.25]], [[-114.68, 39.32], [-114.80000000000001, 39.38], [-114.93, 39.07], [-114.62, 39.2], [-114.68, 39.32]]]]}, "2025-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-118.0, 37.25], [-118.53, 37.47], [-118.75, 38.0], [-118.53, 38.53], [-118.0, 38.75], [-117.75, 38.65], [-117.5, 38.75], [-117.25, 38.65], [-117.0, 38.75], [-116.75, 38.65], [-116.68, 38.68], [-116.65, 38.75], [-116.75, 39.0], [-116.65, 39.25], [-116.68, 39.32], [-117.03, 39.47], [-117.18, 39.82], [-117.53, 39.97], [-117.68, 40.32], [-118.03, 40.47], [-118.25, 41.0], [-118.03, 41.53], [-117.5, 41.75], [-117.25, 41.65], [-117.0, 41.75], [-116.5, 41.54], [-116.0, 41.75], [-115.69999999999999, 41.63], [-115.62, 41.8], [-116.03, 41.97], [-116.18, 42.32], [-116.25, 42.35], [-116.5, 42.25], [-117.03, 42.47], [-117.25, 43.0], [-117.15, 43.25], [-117.25, 43.5], [-117.03, 44.03], [-116.5, 44.25], [-115.97, 44.03], [-115.82, 43.68], [-115.75, 43.65], [-115.5, 43.75], [-115.25, 43.65], [-115.0, 43.75], [-114.47, 43.53], [-114.32, 43.18], [-114.25, 43.15], [-114.0, 43.25], [-113.47, 43.03], [-113.25, 42.5], [-113.35, 42.25], [-113.32, 42.18], [-113.25, 42.15], [-113.0, 42.25], [-112.75, 42.15], [-112.5, 42.25], [-112.25, 42.15], [-112.0, 42.25], [-111.47, 42.03], [-111.32, 41.68], [-111.25, 41.65], [-111.0, 41.75], [-110.47, 41.53], [-110.32, 41.18], [-110.25, 41.15], [-110.0, 41.25], [-109.47, 41.03], [-109.32, 40.68], [-109.25, 40.65], [-109.0, 40.75], [-108.75, 40.65], [-108.5, 40.75], [-107.97, 40.53], [-107.75, 40.0], [-107.97, 39.47], [-108.5, 39.25], [-108.75, 39.35], [-109.0, 39.25], [-109.25, 39.35], [-109.5, 39.25], [-109.75, 39.35], [-110.0, 39.25], [-110.25, 39.35], [-110.32, 39.32], [-110.35, 39.25], [-110.25, 39.0], [-110.47, 38.47], [-110.82, 38.32], [-110.97, 37.97], [-111.32, 37.82], [-111.35, 37.75], [-111.25, 37.5], [-111.47, 36.97], [-111.82, 36.82], [-111.97, 36.47], [-112.5, 36.25], [-113.03, 36.47], [-113.18, 36.82], [-113.25, 36.85], [-113.5, 36.75], [-113.75, 36.85], [-114.0, 36.75], [-114.25, 36.85], [-114.5, 36.75], [-115.0, 36.96], [-115.5, 36.75], [-115.75, 36.85], [-116.0, 36.75], [-116.25, 36.85], [-116.5, 36.75], [-116.75, 36.85], [-117.0, 36.75], [-117.53, 36.97], [-117.68, 37.32], [-117.75, 37.35], [-118.0, 37.25]], [[-115.25, 38.65], [-115.18, 38.68], [-115.07, 38.93], [-115.32, 38.82], [-115.35, 38.75], [-115.32, 38.68], [-115.25, 38.65]], [[-115.5, 40.25], [-115.19999999999999, 40.13], [-115.15, 40.25], [-115.25, 40.5], [-115.12, 40.8], [-115.30000000000001, 40.88], [-115.47, 40.47], [-115.82, 40.32], [-115.85, 40.25], [-115.82, 40.18], [-115.75, 40.15], [-115.5, 40.25]], [[-114.68, 39.32], [-114.80000000000001, 39.38], [-114.93, 39.07], [-114.62, 39.2], [-114.68, 39.32]]]]}, "2025-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-118.25, 44.0], [-118.03, 44.53], [-117.5, 44.75], [-116.97, 44.53], [-116.82, 44.18], [-116.75, 44.15], [-116.5, 44.25], [-115.97, 44.03], [-115.82, 43.68], [-115.75, 43.65], [-115.5, 43.75], [-115.25, 43.65], [-115.0, 43.75], [-114.47, 43.53], [-114.32, 43.18], [-114.25, 43.15], [-114.0, 43.25], [-113.47, 43.03], [-113.25, 42.5], [-113.35, 42.25], [-113.32, 42.18], [-113.25, 42.15], [-113.0, 42.25], [-112.75, 42.15], [-112.5, 42.25], [-112.25, 42.15], [-112.0, 42.25], [-111.47, 42.03], [-111.32, 41.68], [-111.25, 41.65], [-111.0, 41.75], [-110.47, 41.53], [-110.32, 41.18], [-110.25, 41.15], [-110.0, 41.25], [-109.47, 41.03], [-109.32, 40.68], [-109.25, 40.65], [-109.0, 40.75], [-108.75, 40.65], [-108.5, 40.75], [-107.97, 40.53], [-107.75, 40.0], [-107.97, 39.47], [-108.5, 39.25], [-108.75, 39.35], [-109.0, 39.25], [-109.25, 39.35], [-109.5, 39.25], [-109.75, 39.35], [-110.0, 39.25], [-110.25, 39.35], [-110.32, 39.32], [-110.35, 39.25], [-110.25, 39.0], [-110.47, 38.47], [-110.82, 38.32], [-110.97, 37.97], [-111.32, 37.82], [-111.35, 37.75], [-111.25, 37.5], [-111.47, 36.97], [-111.82, 36.82], [-111.97, 36.47], [-112.5, 36.25], [-113.03, 36.47], [-113.18, 36.82], [-113.25, 36.85], [-113.5, 36.75], [-113.75, 36.85], [-114.0, 36.75], [-114.25, 36.85], [-114.5, 36.75], [-115.0, 36.96], [-115.5, 36.75], [-115.75, 36.85], [-116.0, 36.75], [-116.25, 36.85], [-116.5, 36.75], [-116.75, 36.85], [-117.0, 36.75], [-117.53, 36.97], [-117.68, 37.32], [-117.75, 37.35], [-118.0, 37.25], [-118.53, 37.47], [-118.75, 38.0], [-118.53, 38.53], [-118.0, 38.75], [-117.75, 38.65], [-117.5, 38.75], [-117.25, 38.65], [-117.0, 38.75], [-116.75, 38.65], [-116.68, 38.68], [-116.65, 38.75], [-116.75, 39.0], [-116.65, 39.25], [-116.68, 39.32], [-117.03, 39.47], [-117.18, 39.82], [-117.53, 39.97], [-117.68, 40.32], [-118.03, 40.47], [-118.25, 41.0], [-118.03, 41.53], [-117.5, 41.75], [-117.25, 41.65], [-117.0, 41.75], [-116.5, 41.54], [-116.0, 41.75], [-115.69999999999999, 41.63], [-115.62, 41.8], [-116.03, 41.97], [-116.18, 42.32], [-116.25, 42.35], [-116.5, 42.25], [-117.03, 42.47], [-117.18, 42.82], [-117.25, 42.85], [-117.5, 42.75], [-118.03, 42.97], [-118.25, 43.5], [-118.15, 43.75], [-118.25, 44.0]], [[-115.25, 38.65], [-115.18, 38.68], [-115.07, 38.93], [-115.32, 38.82], [-115.35, 38.75], [-115.32, 38.68], [-115.25, 38.65]], [[-115.5, 40.25], [-115.19999999999999, 40.13], [-115.15, 40.25], [-115.25, 40.5], [-115.12, 40.8], [-115.30000000000001, 40.88], [-115.47, 40.47], [-115.82, 40.32], [-115.85, 40.25], [-115.82, 40.18], [-115.75, 40.15], [-115.5, 40.25]], [[-114.68, 39.32], [-114.80000000000001, 39.38], [-114.93, 39.07], [-114.62, 39.2], [-114.68, 39.32]]]]}, "2025-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-109.53, 39.47], [-109.75, 40.0], [-109.53, 40.53], [-109.0, 40.75], [-108.47, 40.53], [-108.25, 40.0], [-108.47, 39.47], [-109.0, 39.25], [-109.53, 39.47]]], [[[-117.53, 40.47], [-117.75, 41.0], [-117.53, 41.53], [-117.0, 41.75], [-116.47, 41.53], [-116.25, 41.0], [-116.47, 40.47], [-117.0, 40.25], [-117.53, 40.47]]], [[[-111.97, 42.03], [-111.75, 41.5], [-111.85, 41.25], [-111.75, 41.0], [-111.97, 40.47], [-112.5, 40.25], [-113.0, 40.46], [-113.5, 40.25], [-114.03, 40.47], [-114.25, 41.0], [-114.03, 41.53], [-113.5, 41.75], [-113.19999999999999, 41.63], [-113.03, 42.03], [-112.5, 42.25], [-111.97, 42.03]]], [[[-117.5, 44.75], [-116.97, 44.53], [-116.82, 44.18], [-116.75, 44.15], [-116.5, 44.25], [-115.97, 44.03], [-115.82, 43.68], [-115.75, 43.65], [-115.5, 43.75], [-115.25, 43.65], [-115.0, 43.75], [-114.47, 43.53], [-114.25, 43.0], [-114.35, 42.75], [-114.25, 42.5], [-114.47, 41.97], [-115.0, 41.75], [-115.25, 41.85], [-115.5, 41.75], [-116.03, 41.97], [-116.18, 42.32], [-116.25, 42.35], [-116.5, 42.25], [-117.03, 42.47], [-117.18, 42.82], [-117.25, 42.85], [-117.5, 42.75], [-118.03, 42.97], [-118.25, 43.5], [-118.15, 43.75], [-118.25, 44.0], [-118.03, 44.53], [-117.5, 44.75]]]]}, "2025-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-117.0, 40.25], [-117.53, 40.47], [-117.75, 41.0], [-117.53, 41.53], [-117.0, 41.75], [-116.47, 41.53], [-116.25, 41.0], [-116.47, 40.47], [-117.0, 40.25]]], [[[-111.97, 42.03], [-111.75, 41.5], [-111.85, 41.25], [-111.75, 41.0], [-111.97, 40.47], [-112.5, 40.25], [-113.0, 40.46], [-113.5, 40.25], [-114.03, 40.47], [-114.25, 41.0], [-114.03, 41.53], [-113.5, 41.75], [-113.19999999999999, 41.63], [-113.03, 42.03], [-112.5, 42.25], [-111.97, 42.03]]], [[[-117.5, 44.75], [-116.97, 44.53], [-116.82, 44.18], [-116.47, 44.03], [-116.32, 43.68], [-116.25, 43.65], [-116.0, 43.75], [-115.75, 43.65], [-115.5, 43.75], [-114.97, 43.53], [-114.82, 43.18], [-114.47, 43.03], [-114.25, 42.5], [-114.47, 41.97], [-115.0, 41.75], [-115.53, 41.97], [-115.68, 42.32], [-115.75, 42.35], [-116.0, 42.25], [-116.25, 42.35], [-116.5, 42.25], [-117.03, 42.47], [-117.18, 42.82], [-117.25, 42.85], [-117.5, 42.75], [-118.03, 42.97], [-118.25, 43.5], [-118.15, 43.75], [-118.25, 44.0], [-118.03, 44.53], [-117.5, 44.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 12.713255302623224}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 7.600955163968352}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.5434663523798235, 4.112534413550748, 3.778468627929726, 3.372886488172753, 3.38402236013701]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.89706954956057, 9.022136942545615, 9.62360534667971, 5.463489786783896, 4.929565684000693]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [7.572821353681839, 8.07859482693402, 7.637443001691424, 5.948338824245677, 5.546202851443127]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [12.713255302623224, 10.673716611295106, 11.028434258929678, 7.507730523735404, 6.929473943476523]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.4399234379078074, 1.5504853181710443, 1.5024614025477288, 1.2642834358751065, 1.3074295151979807]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.9516737718400452, 2.232943035384481, 2.1641584001421545, 1.656464144557539, 1.6643924372722394]}}