Meteorological system that caused freezing storm
![Map that shows the meteorological system that hit North America and cause the Ice Crisis.](https://www.communitystories.ca/v2/grand-verglas-saint-jean-sur-richelieu_ice-storm/wp-content/uploads/sites/89/2018/01/cartedepression.jpg)
Reference: Musée du Haut-Richelieu
The image shows a map of North America that explains the succession of three low pressure systems from the east coast of the United States that encounter an anticyclone from the North Atlantic. It is this rare phenomenon that has caused unprecedented ice accumulations in Montérégie.