Dangerous Cold Weather for Most of the Country; Rare Winter Storm for the South; Fire Weather Concerns for Southern California

Arctic air will filter south and east through early this week. As this cold air moves across the South, a rare winter storm is forecast to develop from Texas, Gulf Coast States into the Southeast through early this week. Several new daily record low temperatures are expected, including new record-low maximum temperatures. For Southern California, fire weather concerns increase this week. Read More >

December 15, 2005
Winter Weather Event Review
Section 1: Introduction

Back to the main research page for December 15, 2005

Section 1 -- Section 2 -- Section 3 -- Section 4

On the morning of Thursday, December 15, 2005, a weak surface low moved along a frontal trough as it moved from west to east through the Ohio Valley. The previous night (Wednesday night), rain fell ahead of the frontal trough with surface temperatures dropping to just above freezing. As the frontal trough and weak surface low moved into Ohio and Kentucky, surface temperatures around or just above the freezing mark stayed nearly steady throughout the day. Precipitation began in the pre-dawn hours as rain or a mix of rain and snow. It quickly transitioned to all snow and increased in intensity across east central Indiana, through the Miami Valley, into parts of central Ohio.

Snow accumulations of 3 to 5 inches were found from Richmond, IN to Marysville, OH. This study will focus on the subtle differences in model trends, thermal fields, and forcing that made this a difficult and uncertain precipitation type forecast.

Note, all times in this document will be for December 15th unless noted.

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