A late-April cold snap has led to a yellow-level frost advisory across Toronto and the Greater Toronto Area (GTA), prompting residents to take precautions for their plants. Temperatures are expected to dip near or below freezing overnight into Friday morning, creating ideal conditions for frost.
This advisory, issued by Environment Canada, encompasses a wide stretch of southern Ontario, affecting municipalities such as Hamilton, Mississauga, Brampton, and Vaughan. The advisory was officially announced at 9:10 a.m. on Thursday.
Residents are being urged to cover vulnerable plants or bring potted ones indoors, especially in frost-prone or low-lying areas where temperatures can fall more quickly. But why is this important? Frost can severely damage tender vegetation, which many have just planted as spring arrives.
The weather forecast shows that Thursday’s high will only reach 11°C with scattered showers, while Friday’s high is expected to be around 10°C with a low of approximately 1°C and even potential flurries. Such fluctuations highlight the unpredictable nature of spring weather.
According to Environment Canada, there is a moderate impact level associated with this frost advisory, indicating high confidence in the forecast. Patchy frost is likely to form under clearing skies as cold air settles overnight.
Historically, frost events like this are not unusual in the GTA during the last week of April and the first week of May. Jessie Uppal from Environment Canada remarked, “Typically, we still experience frost through the last week of April and first week of May.” This pattern suggests that residents should remain vigilant even as warmer days approach.
The region is heading into a chilly start to May with daytime highs struggling to reach the low teens. As such, plant protection becomes crucial not just for aesthetics but also for maintaining local biodiversity and food sources.
