From wild to mild: What happened to the deep freeze

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A southwest wind blew in mild air and moisture, finally, ending such a long streak of air literally from Siberia that someone could have built a case for Russian meddling with our weather.

The snow was the big news, and as it tapered off around 2 p.m. Monday, Ottawa had received 18 centimetres since it began falling late Sunday afternoon.

But it also turned mild in a big hurry.

Ottawa’s temperature started rising early Sunday, all day and through the night, and settled just below the freezing point by lunchtime Monday. It ended a three-day stretch with lows ranging from -25 C to -28 C, and big, chilly winds.

The change in winds after weeks of blowing from the north was the main reason for the weather shift, said David Phillips, Environment Canada’s senior climatologist.

“The winds are south-southwest. It has almost gone from Siberian air to American air,” he said.

“It was not record cold, but just the duration” that was unusual, he said — 18 days without a thaw, and high winds on top of that.

“Now we’re seeing temperatures this week that could be above the melting point. We could even see rain showers instead of snow showers.”

Environment Canada is not expecting any more long streaks of weather, either cold or mild.

After the current mild period, “it’s going to cool off but then warm up next week again,” Phillips said.

“I think this is the kind of pattern where before we were stuck in that same old stale cold air, almost Prairie air, where you get day after day” without a change, he said.

“And now we are seeing something that typically is more (like) Ontario, where you get a change of weather every three or four days. This is more the normal.”

GALLERY:
Photos: Snow returns to Ottawa


  • 416 garbage truck in ditch from Al Hughes


  • A woman takes pictures as snow falls around her during a walk in downtown Ottawa Monday January 8, 2018. Adrian Wyld/THE CANADIAN PRESS


  • Queensway traffic as seen from the Greenbank overpass looking east is slowed to a crawl in the morning commute as an overnight snowfall caused a number of hazards. Wayne Cuddington/Postmedia


  • Queensway traffic as seen from the Greenbank overpass looking east is slowed to a crawl in the morning commute as an overnight snowfall caused a number of hazards. Wayne Cuddington/Postmedia


  • Queensway traffic as seen from the Greenbank overpass looking east is slowed to a crawl in the morning commute as an overnight snowfall caused a number of hazards. Wayne Cuddington/Postmedia


  • Sgt Kerry Schmidt? @OPP_HSD Sometimes a picture is all that is needed.


  • Queensway traffic as seen from the Greenbank overpass looking east is slowed to a crawl in the morning commute as an overnight snowfall caused a number of hazards. Wayne Cuddington/Postmedia


  • A person clears the snow from the sidewalk on York St as the region experiences continuing snowfall on Monday. Wayne Cuddington/Postmedia


  • Pedestrians in the Byward Market as the region experiences continuing snowfall on Monday. Wayne Cuddington/Postmedia


  • Glen Forrester navigates the sloppy streets in his wheelchair in the Byward Market as the region experiences continuing snowfall on Monday. Wayne Cuddington/Postmedia


  • Nick Stocker from the Department of Canadian Heritage takes down some Christmas lights in Confederation Park in Ottawa Monday Jan 8, 2018. Tony Caldwell/Postmedia Network


  • A man walks in the snow past the Ottawa Congress Centre in Ottawa Monday Jan 8, 2018. Tony Caldwell/Postmedia Network


  • Two skaters on the Rideau Canal in Ottawa Monday Jan 8, 2018. Tony Caldwell/Postmedia Network

tspears@postmedia.com

twitter.com/TomSpears1

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