Winter storm watches are posted for parts of the Appalachians and snow advisories are in effect in the Great Lakes as the season's first snow targets those areas from Halloween into the weekend.
Given the expected intensity of a southward plunge of the jet stream and the magnitude and depth of cold air pulled with it, we're not simply talking about chilly rain showers, but also accumulating snow for some as well as the first flakes of the season for others.
Also, with low pressure intensifying off the Eastern seaboard this weekend, the combination of strong winds and wet snow accumulations may lead to some power outages and downed trees/tree limbs in parts of the Appalachians and northern New England.
Persistent strong winds off Lakes Superior and Michigan will also whip up some impressive waves along each lake's south shore. Lakeshore flood advisories have been posted, including in the lakefronts of Chicago and Marquette, Mich.
Even without any snow, it will be chilly and raw, with highs in much of the Great Lakes and Northeast holding in the 40s, or even 30s in some spots.
Link: http://www.wunderground.com/news/halloween-weekend-snow-first-flakes-northeast-great-lakes-20141027
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