For those unfamiliar with the term Alberta Clipper, these are storms thatmove from western Canada to the Midwest then across the Northeast. Usuallystorms of this nature lack moisture, so they do not produce a lot of snow.On the other hand, temperature swings can be quite dramatic. It is not unusualto see a temperature drop of 20 degrees once a clipper has passed. This occursbecause the storm's circulation readily taps into frigid air that is storedover central Canada this time of year.
In any case, a fast-moving Alberta Clipper will move from the Upper MidwestFriday to off the Northeast coast by later Saturday. Snowfall with this systemshould not be any more than a couple to a few inches, but it will be turningquite a bit colder once the low center passes. In fact, the arctic air masscoming down is so cold that many places across the Upper Midwest will havetemperatures lower than 20 below zero Sunday night.
Story by AccuWeather.com Senior Meteorologist John Kocet.
