High Wind in Eastern Toole and Liberty, Montana

Several mesonets measured gusts in excess of 58 mph, including DW4821 Chester, DW4776 Chester, GW0625 Joplin 17 North, GW3546 WHITLASH SEVEN SOUTH, GW0718 Joplin 25nnw, and MTM53 MDA Oilmont. The peak observed gust was 64 mph at DW4821 Chester.

Large scale upper level troughing with two separate embedded upper level lows progressed across the region late June. The colder core, which actually ended up being the southern of the two, moved across Southwest Montana and resulted in snow levels falling to below 6,000ft at times as heaviest precipitation moved over the area. Heavy snow developed near and above pass level in northwest Beaverhead County, resulting in nearly 2 feet of snow near the peaks close to the ID border.

Meanwhile further north under the second upper low, a strong surface low ended up developing near the Hi-Line, which resulted in strong winds in a few zones before the surface low filled/weakened.

Strong upper level support further north resulted in widespread heavy rains, with additional upslope forcing along the Rocky Mountain Front, which resulted in some flooding in Glacier NP June 29.