Winter WES (Weather Event Simulator) Case in Northeastern Montana with Changes in Weather by Elevation

摘要

The high plains of northeastern Montana usually do not have major differences in the weather by elevation; however, 9 April 2005 was a case where the precipitation type was different due to elevation. Northeastern Montana ranges from around 1800 feet above sea level (along the North Dakota border at the Missouri River) to about 5000 feet in southwest Phillips County, with much of northeast Montana being between 2000 and 3000 feet above sea level. On 9 April 2005, most of the area received rain while elevations above 2800 feet received accumulating snow. In addition to the rain and snow, the event had high winds in the second half of the event, which caused blizzard conditions in areas where snow was on the ground. In this paper, section 2 will be a synoptic overview of 9 April. Section 3, will briefly discuss the observed sounding from Glasgow. Section 4 will provide a brief summary of the event.