What This Map Covers
Map viewport covers Manitoba using recent NOAA GOES East and West Geostationary Lightning Mapper flashes. Manitoba is flat prairie in the south giving way to boreal forest, large lakes and the Hudson Bay coast, leaving the settled south open to systems moving up from the US Plains. The viewport spans the whole province, including Winnipeg, Brandon, Steinbach. 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 Manitoba at an increasingly shallow angle going north. Measured against the live feed, detections stop at roughly 55.5°N — the part of Manitoba 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.