SOME RELATIONSHIPS BETWEEN 850-MILLIBAR LOWS AND HEAVY SNOW OCCURRENCES OVER THE CENTRAL AND EASTERN UNITED STATES

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Abstract
It is generally known that certain relationships exist between the production of heavy snow and low-level dynamic and thermodynamic parameters, such as vorticity, moisture, and temperature advection patterns. This statistical synoptic climatological study at the 850-mb level is made to understand better these relationships and also to improve operational forecasting of heavy snow over the central and eastern United States. Models relating percentage frequency of heavy snowfall in 12-hr periods to initial and subsequent 850-mb height and temperature patterns are developed. Also, considerable other statistical information is arranged in tabular form for forecaster evaluation.

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