What This Map Covers
Map viewport covers Alberta using recent NOAA GOES East and West Geostationary Lightning Mapper flashes. Alberta runs from open prairie in the east up to the Rocky Mountain front in the west, a boundary where summer convection often initiates before tracking out over the plains. The viewport spans the whole province, including Calgary, Edmonton, Red Deer. Thunderstorms here are a warm-season pattern, generally May through August.
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. This is not an Environment and Climate Change Canada product and carries no warning status. GLM sits in geostationary orbit above the equator, so it sees Alberta at an increasingly shallow angle going north. Measured against the live feed, detections stop at roughly 55.5°N — the part of Alberta above that line is outside usable viewing geometry, not quiet.
Safety limit: absence of a marker never proves outdoor safety. Satellite detections can be delayed or missed, and storms move between refreshes.