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Ontario Weather Review - November 2006
If October looked like winter come early, then November looked like winter on hold, with temperatures significantly above normal.
The warmest sectors were found in the northwestern and northern portions of Ontario, where temperatures ran three to four degrees above normal. Central and Eastern Ontario were two to three degrees above normal and Southern Ontario was one to two degrees above normal. These comparatively mild temperatures haven't been seen since 2001 in many areas.
The warm temperatures in mid- to late November actually brought out the light jackets or sweaters for many in Southern Ontario - the kind of clothing those experiencing the harsh weather elsewhere in Canada could only envy.
Precipitation, however, was below normal. In some cases, the precipitation was less than half of expected values for November. In a few cases, the precipitation even approached record low values at one point, but the last week of the month brought those numbers up a bit.
Severe Weather
A series of low-pressure systems moved across the province in November, bringing rain and mild temperatures to southern Ontario and snow and freezing rain to the northern parts of the province. It is not unusual to see dramatic weather conditions during transitional (fall-into-winter) months like November. This November, this was most evident in Northwestern and Northern Ontario, with periods of above-normal temperatures occurring in the same month as periods of snow and freezing rain.
By the end of November, these variable conditions had moved into Southern Ontario, when a Colorado low brought near-record warm temperatures on November 29. These warm temperatures were followed by rain on November 30, with temperatures plummeting to near normal as the cold front associated with the Colorado low swept through the province. In fact, for the period from November 28-30, up until the cold front passage, Toronto was significantly warmer than Vancouver. The Colorado low was rapidly followed by a Texas low moving into southern Ontario in the dying hours of November, which ushered more winter-like conditions into the province at the beginning of December.
Unusual mean temperature readings:
| Location |
Mean Temp |
Normal |
Difference |
Warmest Since |
| Petawawa |
3.1 |
-0.4 |
3.5 |
2001 |
| Kapukasing |
-1.4 |
-4.8 |
3.4 |
2001 |
| Dryden |
-2 |
-5.3 |
3.3 |
2004 |
| Geraldton |
-2.8 |
-6.1 |
3.3 |
2004 |
| Earlton |
0.3 |
-2.9 |
3.2 |
2001 |
| Ottawa |
4.1 |
1 |
3.1 |
2001 |
| Thunder Bay |
0.1 |
-3 |
3.1 |
2001 |
| Kenora |
-1.9 |
-4.9 |
3 |
2004 |
| Chapleau |
-0.9 |
-3.8 |
2.9 |
2001 |
| North Bay |
1.5 |
-1.4 |
2.9 |
2001 |
| Timmins |
-1.1 |
-4 |
2.9 |
2001 |
| Muskoka |
3.2 |
0.6 |
2.6 |
2001 |
| Peterborough |
4.2 |
1.7 |
2.5 |
2001 |
| Sudbury |
0.9 |
-1.5 |
2.4 |
2001 |
| Moosonee |
-2.3 |
-4.7 |
2.4 |
2004 |
| Trenton |
4.9 |
2.6 |
2.3 |
2001 |
| Sioux Lookout |
-3.3 |
-5.6 |
2.3 |
2004 |
| London |
5.2 |
3.1 |
2.1 |
1999 |
| Kingston |
5.4 |
3.4 |
2 |
2001 |
| Wiarton |
4.6 |
2.6 |
2 |
2001 |
| Toronto Pearson |
5.2 |
3.2 |
2 |
2004 |
Unusual precipitation readings (in millimetres):
| Location |
Precipitation |
Normal |
Difference |
Driest Since |
| Wawa |
35.4 |
89.4 |
-54 |
1981 |
| Muskoka |
71.5 |
112.2 |
-40.7 |
2004 |
| Kapuskasing |
33.4 |
69.2 |
-35.8 |
1996 |
| Wiarton |
88 |
115.6 |
-27.6 |
2004 |
| Chapleau |
33.6 |
60.1 |
-26.5 |
1999 |
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