Journal
MONTHLY WEATHER REVIEW
Volume 138, Issue 7, Pages 2499-2527Publisher
AMER METEOROLOGICAL SOC
DOI: 10.1175/2010MWR3213.1
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Funding
- National Science Foundation [ATM-0504028]
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The northwest United States is visited frequently by strong midlatitude cyclones that can produce hurricane-force winds and extensive damage. This article reviews these storms, beginning with a survey of the major events of the past century. A climatology of strong windstorms is presented for the area from southern Oregon to northern Washington State and is used to create synoptic composites that show the large-scale evolution associated with such storms. A recent event, the Hanukkah Eve Storm of December 2006, is described in detail, with particular attention given to the impact of the bent-back front/trough and temporal changes in vertical stability and structure. The discussion section examines the general role of the bent-back trough, the interactions of such storms with terrain, and the applicability of the sting jet'' conceptual model. A conceptual model of the evolution of Northwest windstorm events is presented.
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