Squalls end early Sunday, short break before next system arrives

Digital Writers
·3 min read
Squalls end early Sunday, short break before next system arrives
Squalls end early Sunday, short break before next system arrives

The sometimes intense squalls that blanketed southern Ontario's snow belt communities with 20-30 cm with snow Saturday will be just about done by the morning, and a calmer and milder Sunday is ahead. But a new system will track into the province by day's end, bringing snow and rain through the night into Monday, and another round of snow squalls as it departs. More details on that, and a peek at New Year's Eve, below.

WEATHER HIGHLIGHTS:

  • Lake-effect snow squalls taper off by early Sunday morning

  • Another system will move in Sunday evening, with rain, snow or a rain/snow mix depending on timing and location

  • More snow squalls for Monday in the wake of the system's passage

SUNDAY: SQUALLS END, TEMPERATURES REBOUND AHEAD OF NEXT SYSTEM

Much of Boxing Day was marked by lake-effect snow squalls as cold winds blew over the mostly still-unfrozen Great Lakes, with at-times significant snowfall reaching deep into the usual snow belts. Some communities had been buried in 20-30 cm of snow by day's end.

A few lingering squalls were expected to linger through the overnight, but by Sunday morning, the last of them should have tapered off after dropping a few extra centimetres in some communities.

ONSnow
ONSnow

Sunday looks quite a bit calmer for the region, with fair and seasonal conditions. Temperatures around freezing may feel a bit cooler with the wind chill, but not as drastically as Saturday, where daytime highs felt colder than -10 for some people.

But the break will be short-lived, as a new system, a fast-moving Alberta clipper, looks to race through the province, beginning Sunday night, when snow begins to push into cottage country and the Dundalk Highlands, while rain begins to move into southwestern Ontario and the GTA in the overnight period.

Ontario rain
Ontario rain

Temperatures will be such that many communities may go back and forth from rain to snow and back again, with some potential for freezing rain as well into Monday morning.

MONDAY AND BEYOND: POTENTIAL FOR SNOW, RAIN ON NEW YEAR'S EVE

Though that system's effects will be spent by the morning, Monday afternoon and evening will see snow squalls develop off Lake Huron, which may bring 10-15 cm for Dundalk Highlands and cottage country. Travel will likely be impacted in these regions. The GTA may see about 5 cm of lake-effect snow on the backside of the system

ON SNOW LR
ON SNOW LR

Beyond, a messy storm is expected to track into the upper Great Lakes for New Year’s Eve and Day with a second low developing and moving into the northeastern U.S. It is too early to know the exact track and impacts, but at this point, it looks like southern Ontario will see some snow, ice and rain – but rain looks to be the dominant precipitation type at this time.

Thumbnail courtesy of Mark Robinson.

Stay tuned to The Weather Network for the latest forecast details.