Eorecast Center zooms in on the northern Plains and Midwest for this issue, taking a look at a November 2007 weather system head-for the Great Lakes region. An occluded front, a warm front, and a cold front are all present. Bear in mind the cardinal rule of frontal placement: always draw it on the warm side of a temperature transition zone. A change in temperature is the primary indicator of a front. Wind shifts and pressure troughs are also important indicators, but without a temperature transition they do not represent a front.
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