A cold airmass over the Great Lakes states and northeast that allowed an unprecedentedly early snowfall over central Pennsylvania (see precipitation totals ending at 1200 UTC on 16 October here) is also supporting the development of Lake-effect precipitation downwind of Lake Michigan. In the loop above (click the loop to... Read More

Snow is widespread today from central Pennsylvania northward into central New York. Accumulating snow only rarely falls this early in the season in that part of the country, and at many stations this is the earliest measurable snow on record. The above image is an enhanced 11-micron image from GOES-12... Read More

Columbus Day is the Anniversary of a truly historic storm in the Pacific Northwest. On October 12, 1962, one of the most intense storms on record caused wind gusts exceeding hurricane force over a broad swath of coastal Washington and Oregon. Now, 47 years later, a weaker but still potent... Read More

Tropical Systems can occasionally be accompanied by Predecessor Rainfall Events (PREs). This band of heavy rainfall is not associated with the spiral bands of the tropical system, but rather with an interaction with a mid-latitude jet that exists Poleward of the tropical feature. Some notable PRE-producing tropical systems in... Read More