Brett Anderson

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Updated Long-Range Forecast Model Outlook

November 27, 2012; 11:57 AM ET

This is my latest interpretation of the fairly reliable ECMWF (European model) weekly long-range forecast model output for North America, which now goes out through the week of Dec. 17-23.

Keep in mind, this is not a forecast from or myself, and this does not necessarily have to match up with the 25-day forecast.


Although this model is showing widespread warmth from Dec. 3-9, it does appear that a batch of cold air could get drawn down into eastern Ontario, Quebec and the Northeast U.S. between Dec. 5 and 7.

Based on the overall upper-level pattern that I expect for the second and third week of December, I do feel that this latest ECMWF forecast might not be cold enough from Manitoba and Ontario then into the eastern U.S.

The views expressed are those of the author and not necessarily those of AccuWeather, Inc. or


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Brett Anderson
Brett Anderson covers both short-term and long-term weather and storm forecasts for Canada in this blog for