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Up to 10 cm of snow possible in southern Ontario with Texas low

Sunday, January 24th 2021, 9:03 pm - A stateside low-pressure system will graze southern Ontario on Monday night as it pushes east and will bring snow to the GTA.

A developing Texas low is approaching the Great Lakes could bring up to 10 cm of snow to parts of southern Ontario by Tuesday. A strong ridge over central Canada creates some uncertainty about the exact track of this system, but meteorologists say that the forecast confidence has increased and there is the potential for 5-10 cm of snow around the Golden Horseshoe, with amounts dropping off towards London and north of Lake Ontario. See below for details and timing.


WEATHER HIGHLIGHTS:

  • Texas low begins to push snow into southern Ontario on Monday night
  • Golden Horseshoe could see 5-10 cm of snow by Tuesday
  • Colder temperature pattern settled in, though relatively seasonal for the week

TEXAS LOW WILL PUSH INTO SOUTHERN ONTARIO

A Texas low will feed on ample moisture from the Gulf of Mexico as it begins to take shape. Arctic air to the north will both fuel the storm and try to direct it eastward. A usual track towards the Ohio Valley and into the lower Great Lakes will be the target.

ONSNOW

“All in all, the focus will be on just how much moisture the low can push into southern Ontario. We are also watching a potential significant snowfall gradient for regions along the edge of the precipitation cutoff of this system,” says The Weather Network meteorologist Tyler Hamilton.

“Over the past couple of days, most model guidance has trended the track of the system north. Lesser amounts are expected north and east of the GTA. But if the track of the storm lifts further north, those regions may continue to see snowfall forecast increases. At this time, 5-10 cm of snow is possible for the GTA and Niagara,” Hamilton says.

ONICONS

Temperature-wise, daytime highs Monday and Tuesday will be colder than what southern Ontario has seen for much of this winter, but they are reflective of this time of the year. Near to slightly below seasonal temperatures are expected to dominate the week ahead.

Be sure to check back for updates as we continue to monitor the timing and potential impacts of the Texas low.

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