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A Composite study examining five heavy snowfall patterns for south-central Montana
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1998
[PDF-2.08 MB]
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Description:This study identifies heavy snow patterns for south-central Montana. A snow amount of 6 inches or greater for each event was considered heavy snow for this study. Data for the years 1948-1994 was compiled using the NCEP Version Ill Grid Point Data Set. Patterns were examined during the time of heaviest snow, and composites made of 5 distinct flow patterns. The five flow patterns composited were: Southwest Flow, Amplified Southwest Flow, West Flow, Northwest Flow, and Closed Low Composites were obtained by using the GEMCD program. Fields chosen for the composites were: 500 mb heights, Mean Sea-Level Pressure (MSLP), and 250mb winds. Data for 250mb winds was only available since 1965. To isolate the heavier snowfalls, separate composites were performed for single day totals of 5-9 inches: Single day snows of 10+ inches were rare, so they were examined individually.
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Content Notes:Jonathan D. Van Ausdall, Thomas W. Humphrey.
"February 1998."
Includes bibliographical references.
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Rights Information:Public Domain
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Compliance:Library
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