What This Map Covers
Map viewport covers Canada using recent NOAA GOES East and West Geostationary Lightning Mapper flashes across their satellite footprint.
GLM detects optical flashes from orbit. It does not classify every marker as a cloud-to-ground strike, replace Canadian weather radar, or predict where lightning will hit next.
Safety limit: absence of a marker never proves outdoor safety. Satellite detections can be delayed or missed, and storms move between refreshes.