The synoptic situation at 0000Z/30 December 2000 featured an area of low pressure (1012 hPa) moving eastward through eastern Ohio, while a second low was situated 250-300 km (400-500 mi) southeast of North Carolina. By 0600Z/30, a new coastal low of 1004 hPa had formed (much further north than anticipated by forecasters) near the Delmarva Peninsula. By 1200Z/30, this surface low was about 200 km (325 mi) southeast of Atlantic City, and heavy snow began falling across most of northern New Jersey and the New York City metropolitan area. By 1500Z/30, heavy snow was falling along the east facing slopes of the Catskills and was pushing rapidly north into east central New York and western New England. The surface low (995 hPa) moved over New York City by 1800Z/30 and then progressed rapidly to the northeast to the Connecticut-Rhode Island border (992 hPa) at 0000Z/31. This strong surface cyclone developed due in part to a powerful 500 hPa low that barreled southeastward through the Midwest and into the Mid-Atlantic states on the morning of 30 December.
This poster will focus on an investigation of the evolution of the large scale pattern associated with the snowstorm. The storm will be examined from a potential vorticity perspective, including a comprehensive analysis of 'dynamic tropopause' maps. Additionally, the role of upper and lower level jet streaks will also be investigated. The planetary scale teleconnection indices will be examined before, during and after the storm (e.g., North American Oscillation, Pacific North American index). Data used in this analysis will include ECMWF grids, surface observations, upper air data, satellite imagery, and radar data.
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