| Regression equation for the peak wind gust 6 to 12 hours in advance at Great Falls during strong downslope wind storms - :14108 | National Weather Service (NWS)
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Regression equation for the peak wind gust 6 to 12 hours in advance at Great Falls during strong downslope wind storms
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    Strong downslope winds are common in Montana along the East Slopes of the Rockies from Fall to Spring. Wind gusts over 100 MPH occur in some areas each year producing property damage and personal injuries. These winds occur in a variety of synoptic weather patterns, but the most frequent with the strongest winds occur in well defined warm air advection patterns ahead of an eastward advancing upper trough (Figures 1 to 6). This suggests that the speed of downslope winds for the above cases can be objectively predicted with a multiple regression equation similar to the MOS equations produced by TDL. This paper describes the development and verification of a regression equation for the peak wind gust 6 to 12 hours in advance at Great Falls. The purpose of this research project was an objective criterion that would alert the forecaster to the synoptic potential for damaging winds, so that a high wind warning can be issued well in advance, if needed.

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