The Essex Region Conservation Authority has issued a Flood Watch for the region.
ERCA says heavy rain and high winds Saturday are causing concern for the areas of Amherstburg, Essex, Kingsville, Leamington and Pelee Island.
On Sunday, the storm is forecast to shift which could impact Lakeshore, Tecumseh and east Windsor.
Elevated water levels may cause shoreline erosion and damage to docks and breakwalls as well.