Southern Ontario is experiencing unseasonably warm weather for late February, with temperatures rising above freezing for the first time this year, leading to snowmelt and concerns about flooding. On Monday, Toronto's Pearson Airport recorded temperatures surpassing 5°C, marking the second-latest initial 5-degree day on record, trailing only 1977 and 1958. Hamilton also reported 9.4°C, the highest temperature noted across Ontario so far this year.
The warm weather is largely attributed to gusty southerly winds and the influx of milder air masses. Highs of around 6°C are anticipated on Tuesday, exceeding the seasonal average of 1°C for this time of year. Despite the pleasant warmth, forecasts indicate showers might disrupt outdoor activities, especially as the rise in temperatures is accelerating snowmelt. This melting snow has increased the risk of flooding across various locales, prompting warnings for residents.
Environment Canada meteorologist Geoff Coulson highlighted the significance of this warm spell, noting, "Temperatures above the freezing mark are expected across southern and eastern Ontario this week after a pretty chilly run of temperatures during February." The heaviest impacts of the warm weather seem to be concentrated around the Ottawa area, where daytime highs could hit between 1°C and 3°C, doubling the long-term average low for February.
Throughout the week, the mild conditions are set to persist, but they will be interrupted midweek by a low-pressure system bringing mixed precipitation. Wednesday afternoon is expected to kick off with rainfall over southwestern Ontario, eventually reaching regions like the Greater Toronto Area (GTA) by early Thursday. While some areas may witness rain, others—especially those north of the GTA—might see wet, heavy snowfall ranging from 5 to 10 cm.
The warm weather is not only easing winter's grip on the region but also drawing out local residents eager to embrace the change. Photos of melting snowbanks and puddle-filled streets are popping up on social media as this unusual warmth becomes the talk of the community. One resident mentioned, "It feels like spring is around the corner, even though we know winter isn’t finished yet."
Although immediate conditions feel spring-like, meteorologists warn residents to brace for the return of cold temperatures by the weekend. Seasonal patterns are likely to reassert themselves, with colder air pushing back after March begins. Coulson stated, "We're expecting more wintry conditions to dominate for the first 10-15 days of March, raising the possibility of winter storms as temperatures dip."
Looking back at precipitation records, this winter has seen significantly less rainfall than usual; with only 3.1 mm reported at Pearson Airport, residents are encouraged to address issues with local catch basins to mitigate water pooling from the melting snow. This situation becomes even more pressing as potential flooding looms with temperatures projected to dip significantly after the warm spell.
Looking at broader impacts, the warm temperatures are being felt throughout much of Canada, marking the end of February's deep freeze. The entire southern Ontario region is poised for change, which will not only alter day-to-day life but also deeply affect businesses and services reliant on colder weather.
Environmental agencies are keeping close tabs on water levels as the melting snow rushes toward drainage systems. Residents are advised to stay vigilant as the warmer conditions give way to uncertain and possibly tumultuous weather later this week. Those who live near rivers or historically flood-prone areas are especially urged to prepare for possible flooding.
By the end of the week, expecting rain and snow mixed with fluctuational temperatures could present challenges. Transit authorities are preparing for what might be messy commutes as early as Thursday, with impacts expected through to the weekend as weather systems pass through Ontario.
Residents are reminded to take on the task of clearing catch basins to help prevent standing water from accumulating, which can lead to localized flooding issues. It’s no surprise then, as one forecaster commented, "With temperatures rising and snow melting, everyone must be proactive about managing water runoff and pooling." Interest remains strong in how this week's weather developments will set the tone for the upcoming month and what it indicates about broader climatic trends.