A small, fast moving storm which forms on a quasi-stationary Pacific front, often in the lee of the Rocky Mountains in Alberta, Canada. The low normally travels quickly southeast across the northern or central United States and is followed by arctic air. It is now recognized that lows moving inland from the Pacific are the actual parent systems.
A small, fast-moving low-pressure system that forms in western Canada and travels southeastward into the United States. These storms, which generally bring little precipitation, generally precede an Arctic air mass.
A fast moving low pressure system that moves southeast out of Canadian Province of Alberta (southwest Canada) through the Plains, Midwest, and Great Lakes region usually during the winter. This low pressure area is usually accompanied by light snow, strong winds, and colder temperatures. Another variation of the same system is called a "Saskatchewan Screamer".
An Alberta clipper, also known as a Canadian Clipper, is a fast moving Low pressure area which generally affect the central provinces of Canada, as well as parts of the Upper Midwest and Great Lakes regions of the United States. Most clippers occur in winter, but can occur outside of the season; generally, off-season clippers would occur in November.