London Ontario Weather: Slick, dicey travel expected Friday as 5–20 cm forecast
london ontario weather will flip back to winter as a quick-moving low spreads 5–20 cm of snow across southern Ontario on Friday (ET). After Wednesday’s (ET) freezing rain, ice and snow event, the next system will focus on snow from the Lake Huron shores into London and the Greater Toronto Area, with snowfall rates increasing by Friday afternoon and evening (ET). Motorists should expect slippery roads, reduced visibility and slowdowns during afternoon and evening commutes on Friday (ET).
London Ontario Weather: the core threat Friday (ET)
The most critical fact is the snowfall total: 5–20 cm of snow is expected to fall across much of southern Ontario on Friday (ET). The system is described as a quick-moving, cross-country low that will originate on the West Coast, push through the Prairies and arrive in Ontario carrying the bulk of the snow on Friday (ET). Snowflurries are set to begin Friday morning (ET), stretching from the Lake Huron shores into London and the GTA, and snowfall rates will increase through the afternoon and evening (ET).
Roads will be slippery and visibility may be reduced as the snow intensifies Friday afternoon and evening (ET); drivers are warned to allow extra time for travel. Some areas may see snow change to rain by Friday evening (ET), including Windsor, London and Niagara, introducing a mix that can complicate road conditions and cleanup operations.
Travel impacts and timing (ET)
Prepare for quickly changing and deteriorating travel conditions on Friday (ET). The sequence begins with Friday morning flurries (ET), then moves into heavier snow by the afternoon and evening (ET) when slowdowns in commutes are most likely. Municipal snow-clearing equipment is advised to be ready, and stay-at-home contingency plans or added travel time should be considered for those planning Friday trips (ET).
The snow is forecast to move east after hitting southern Ontario: snowfall then shifts into Ottawa late Friday evening and continues into Saturday morning (ET). Saturday (ET) will bring a brief break from active weather, but conditions are expected to remain blustery with below-normal temperatures. From a false spring to spring flooding concerns and now back to snow, the region is facing a bumpy stretch of March weather.
What’s next: follow-up systems and late-week pattern (ET)
Forecasters will be watching a Colorado low by Sunday (ET) that could bring more impactful snow and rain to the region. Monday (ET) is expected to turn very windy and colder, with bands of lake-effect snow developing Monday (ET) and continuing through Tuesday (ET). Temperatures are forecast to rebound during the second half of next week (ET) but may trend colder again over the following weekend (ET). An active pattern with changeable temperatures is expected to continue through late March (ET).
This sequence leaves london ontario weather in a state of rapid change over the coming days: expect a snowy Friday (ET), a brief and blustery Saturday (ET), a potentially impactful system to watch by Sunday (ET), and windy, lake-effect conditions early next week (ET). Readers are advised to plan for tougher travel Friday afternoon and evening (ET) and to monitor updates as the pattern evolves.
