Residents of St. Thomas should prepare for a wet and stormy weekend as a low-pressure system moves into the region. Environment Canada has issued a special weather statement for the area, warning of heavy rain and a risk of thunderstorms throughout Saturday, April 4, 2026.
The system, known as a Colorado low, is expected to bring between 25 and 50 millimetres of rainfall to St. Thomas, with The Weather Network placing the probability of precipitation at nearly 100 percent. The heaviest rainfall is expected during the evening and overnight hours on Saturday. While April is already the month with the highest chance of precipitation in the community, residents are advised to keep an eye on local conditions as thunderstorms could lead to higher localized rainfall totals.
The weather is set to undergo a sharp change immediately following the weekend. Temperatures are expected to drop significantly by Sunday, April 5, 2026, bringing a shift to mixed precipitation. The cooling trend will continue into next week, with flurries likely by Tuesday, April 7, 2026.
Local authorities have been focusing on emergency preparedness recently, with communities across Elgin County receiving provincial funding in March 2026 to help enhance flood response capabilities. Residents are encouraged to stay informed about potential weather alerts by checking official updates, and can find further information regarding flood safety through the Ontario Ministry of Natural Resources and Forestry.
