What This Map Covers
Map viewport covers Quebec using recent NOAA GOES East and West Geostationary Lightning Mapper flashes. Quebec reaches from the St. Lawrence valley north to Ungava Bay and Hudson Strait, with the populated south sitting far closer to continental storm tracks than the north. The viewport spans the whole province, including Montreal, Quebec City, Laval. Thunderstorms here are a warm-season pattern, generally May through September.
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 Quebec at an increasingly shallow angle going north. Measured against the live feed, detections stop at roughly 55.5°N — the part of Quebec 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.