What This Map Covers
Map viewport covers British Columbia using recent NOAA GOES East and West Geostationary Lightning Mapper flashes. British Columbia is a mountainous Pacific province where the Coast Mountains, the interior plateau and the Rockies break weather systems apart, and terrain-driven convection over the dry interior looks very different from the coast. The viewport spans the whole province, including Vancouver, Surrey, Victoria. 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 British Columbia at an increasingly shallow angle going north. Measured against the live feed, detections stop at roughly 55.5°N — the part of British Columbia 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.