Residents in St. Thomas, Ontario, should prepare for wet weather and potential road pooling as a weather system brings rain and a risk of thunderstorms on March 10 and March 11, 2026. This shift to wetter conditions arrives during the seasonal spring thaw, which can make travel difficult for those commuting in the morning.
Environment Canada forecasts a 40 per cent chance of showers or drizzle for Tuesday afternoon, with temperatures reaching a high of 13 degrees. There is also a risk of a thunderstorm late Tuesday afternoon before more steady rain arrives.
The rain is expected to continue through Wednesday, which may lead to extra water on the ground and slippery surfaces. The City of St. Thomas has rules in place to handle road hazards caused by water runoff and drainage issues during this time of year.
Local roads and drainage systems often face extra pressure in March when rain mixes with melting snow and soaked ground. Drivers should watch for deep puddles as temperatures are expected to drop to minus 4 degrees by Wednesday night, potentially bringing flurries or rain showers.
