Environment Canada says a rare weather event is expected for southern Ontario on Tuesday: a rainy day.
The agency issued a special weather statement for Windsor-Essex and Chatham-Kent.
A significant widespread rainfall event is expected beginning overnight or early Tuesday morning and ending Tuesday evening.
Rainfall amounts will range from 25 to 40 mm in most places, says Environment Canada. There may be appreciably higher amounts exceeding 60 mm in some locales.
The system responsible for this rainfall is a slow-moving low pressure system from Texas. It will bring tropical moisture from the Gulf of Mexico to southern Ontario.
Rainfall warnings may be issued if a more significant event of widespread 50 mm or more appears more certain.
