Yellow Rainfall Warning Issued for Tamworth, Sydenham, and South Frontenac
Environment Canada has issued a rainfall warning for parts of southern Ontario, forecasting up to 40 mm of rain on saturated or frozen ground through Wednesday.
Alert Details
Environment Canada has issued a yellow rainfall warning for portions of southern Ontario. The alert was triggered by a series of low pressure systems expected to bring significant precipitation to the region. This warning is issued alongside an existing freezing rain warning for the same area.
Affected Areas
The warning is specifically in effect for the following geographic regions:
- Tamworth
- Sydenham
- South Frontenac
What You Should Do
Residents should be aware that water will likely pool on roads and in low-lying areas, potentially creating hazardous driving conditions. For information concerning flooding, residents are urged to consult their local Conservation Authority or the Ontario Ministry of Natural Resources office. Latest details are available at Ontario.ca/floods. Severe weather reports can be sent via email to ONstorm@ec.gc.ca or posted on X using the hashtag #ONStorm.
Expected Conditions
Total rainfall amounts are expected to range between 20 to 40 mm. Areas that experience thunderstorms may see locally higher amounts. A significant concern for this event is that the ground is currently saturated or frozen, leaving it with little ability to absorb the incoming rainfall. Residents should also prepare for a possible period of freezing rain before the precipitation transitions entirely to rain.
Timeline
The alert is effective as of Wednesday morning, March 11, 2026. The heavy rain is expected to last through the day, with the current warning window set to expire at 10:40 PM.
Source: ECCC Official Notice