Arctic air about to go on a hiatus
By Brett Anderson, AccuWeather senior meteorologist
1/18/2018, 11:22:10 AM
No major storms for much of Canada through this weekend.
Significant pattern change taking place this weekend will force a major retreat of Arctic air out of eastern North America and the result will be a significant warmup through early next week. Temperatures will drop once again during the middle of next week, but nothing out of the ordinary followed by another warmup for the weekend of Jan. 27/28.
--Colorado low will track up into the Great Lakes by early next week. The result will likely be a narrow band of heavy snowfall, which may impact the region in Ontario from Thunder Bay to Sault Ste. Marie Sunday night through Monday.
--Farther south/east, there may be a period of freezing rain or sleet across portions of southern/eastern Ontario Sunday night into Monday morning, which may cause some travel delays for the Monday morning commute.
--By Tuesday, the storm spreads into Quebec with the potential for some mixed precipitation in Montreal and snow near Quebec City.
--The core of the Arctic air will be over Siberia through Jan. 28, then some of that may bleed into Northwest Canada after Jan. 28.
--I do not see any blasts of Arctic air into eastern Canada through the first week of February.
Clues to the longer range.....
Below is my latest interpretation of the ECMWF weeklies forecast model output.
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Canadian weather blog
Brett Anderson - January 15, 2019, 1:17:10 PM EST
Quick update on the long range and a look at the latest snowfall potential for eastern and Atlantic Canada.
Brett Anderson - January 09, 2019, 9:39:22 AM EST
Pattern change likely to deliver colder air into the east late this month, while the west turns drier and milder.
Brett Anderson - January 04, 2019, 10:11:38 AM EST
Still anticipating a significant pattern change late in January into early February.
Brett Anderson - January 02, 2019, 1:17:45 PM EST
Impacts of the sudden stratospheric warming event may eventually be felt after the 20th of January.
Brett Anderson - December 05, 2018, 7:28:35 AM EST
Latest thoughts on the long-range pattern through the end of December.