Environment Canada

Environment Canada

February 01, 2007 12:10 ET

Environment Canada: Ontario Weather Review

TORONTO, ONTARIO--(CCNMatthews - Feb. 1, 2007) -

January 2007

Winter took a long time to arrive - but it's here now. The milder-than-normal conditions at the end of 2006 continued into the second week of January. Then, the long-awaited cold temperatures and snowy conditions moved into the province. Typical winter conditions dug in for a few days, but during the latter half of the month there were fluctuations between these seasonal temperatures and the milder conditions that had become more familiar of late. Thus, overall, January 2007 ended up well above normal.

Yet, even though the monthly average temperatures proved to be two to four degrees above the norm across the province, it was still much colder than January 2006. A year ago, temperatures across Ontario broke records for the mildest January in history.

As for precipitation, it tended to be lower than normal in most areas and snowfall provided a lower percentage of the normal total. However, mild temperatures brought rainfall totals to almost double the norm in some parts of Southern Ontario.

There was a record set for one of the few areas that reported higher-than-normal precipitation. Moosonee established a new high for precipitation in January by almost tripling its normal value this past month.

Severe Weather

The New Year was ushered in January 1 over Central and Northeastern Ontario with a low-pressure area that combined snow for the Northeast with rain for a good part of Central Ontario. Snow amounts of between 10 and 15 centimetres were recorded in the Timmins and Kapuskasing area, amounts that are fairly typical for January. However, what wasn't typical were the 10 to 15 millimetres of rain which fell in the Sudbury and North Bay areas. Precipitation in early January in these areas usually falls as freezing rain, ice pellets or snow.

On January 15, a well-developed storm system brought a significant freezing rain event to a good part of Southern Ontario. Many locations from London through Toronto and into Kingston experienced a number of hours of freezing rain, freezing drizzle or ice pellets. The freezing precipitation was directly linked to hundreds of mostly minor accidents on roads across these districts. Just to the north of the areas impacted by freezing rain, in the Barrie to Ottawa area, the precipitation fell as snow with general accumulations of 10 to 15 centimetres.

After the middle of the month, a number of intrusions of unseasonably cold arctic air fired up the snowsquall machine over the Great Lakes as this very cold air moved over the relatively ice-free and warmer waters of the Great Lakes. Snowsquall activity had been pretty scarce up until the middle of January, due to the very mild temperatures. But with a return to colder air, areas to the lee of Lake Superior, Lake Huron and Georgian Bay experienced a series of snowfalls, with local accumulations in the 10- to 15-centimetre range.

Another bout of freezing precipitation closed out the month when locations around South-Central Ontario experienced a number of hours of freezing drizzle during the morning hours of January 27. The steady freezing drizzle resulted in significant ice accretions in some areas, leading to people waking up that Saturday morning to find their vehicles coated in ice.

In the Northwest, aside from the return of more normal January temperatures around mid-month, no major snowfalls were reported. A series of rapidly moving disturbances that moved over the area from the west did bring some snow with them, but the speed of these systems meant that no one area received large amounts.



Unusual temperature readings:

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Location Mean Temp Normal Difference Warmest since
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Moosonee -15.4 -20.7 5.3 2006
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Pickle Lake -16.5 -20.5 4.0 2006
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Earlton -12.5 -16.4 3.9 2006
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Geraldton -15.5 -19.4 3.9 2006
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Timmins -13.6 -17.5 3.9 2006
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Wawa -11.2 -14.8 3.6 2006
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Sault Ste Marie -7.0 -10.5 3.5 2006
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Sioux Lookout -15.1 -18.6 3.5 2006
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Sudbury -10.3 -13.6 3.3 2006
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Toronto Pearson -3.0 -6.3 3.3 2006
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London -3.1 -6.3 3.2 2006
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Thunder Bay -11.6 -14.8 3.2 2006
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Dryden -14.4 -17.5 3.1 2006
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Trenton -4.4 -7.5 3.1 2006
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Windsor -1.4 -4.5 3.1 2006
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Chapleau -13.4 -16.4 3.0 2006
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Kapuskasing -14.3 -17.3 3.0 2006
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Kenora -14.3 -17.3 3.0 2006
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Ottawa -7.8 -10.8 3.0 2006
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Petawawa -9.9 -12.9 3.0 2006
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Peterborough -5.9 -8.9 3.0 2006
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Kenora -14.3 -17.3 3.0 2006
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Sarnia -2.5 -5.4 2.9 2006
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Red Lake -16.9 -19.6 2.7 2006
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Hamilton -3.4 -6.0 2.6 2006
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Waterloo Wellington -4.5 -7.1 2.6 2006
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Elliot Lake -8.6 -11.1 2.5 2006
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North Bay -10.5 -13.0 2.5 2006
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Toronto City -1.7 -4.2 2.5 2006
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Wiarton -4.3 -6.8 2.5 2006
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Unusual precipitation readings (in millimetres):

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Location Precipitation Normal Difference Driest since
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Kingston 55.6 87.6 -32.0 2005
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Earlton 24.5 54.0 -29.5 1968
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Sudbury 39.4 68.6 -29.2 2003
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Muskoka 69.8 98.5 -28.7 2002
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Wawa 30.6 59.3 -28.7 2003
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Location Precipitation Normal Difference Wettest since
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Windsor 112.6 57.6 55.0 2005
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Record precipitation readings (in millimetres):

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Location Precipitation Normal Difference Previous record
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Moosonee 101.5 33.9 67.6 70.9 (1969)
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(Egalement offert en français)

Contact Information

  • Environment Canada, Ontario Region
    Jack Saunders
    Communications Advisor/Media Relations
    (416) 739-4785