The severe weather tracker is yellow indicating moderate impacts are likely, and possibly high impacts late Wednesday afternoon and evening.
A strong storm system is sitting on the coast of Washington with a cold front parallel to the coast. Both will slowly move east, with the low pressure just north of the Canadian border by late Thursday afternoon with the front extending through south central Montana around Billings. As the front approaches the region, showers and thunderstorms are expected to develop Wednesday afternoon and continue into the evening. Some storms may be severe, with strong winds, hail and lightning. The best chance will be along and north of a Hamilton to Butte to White Sulphur Springs line. Hot and windy in advance of the front Wednesday evening.
As the front moves through the region overnight and early Thursday, gusty west winds will usher cooler air into the region. After lows in the 50s, highs will only warm to the upper 60s around Kalispell and the 70s elsewhere. Lingering showers are likely across northwest Montana in the Kalispell area Thursday.
Glacier National Park will be highly impacted by this storm. After thunderstorms Wednesday evening, cooler air will lower snow levels to 7000 feet in the park. Strong winds are expected, with gusts up to 60 mph at Logan Pass. Tourists will need to use caution in the park.
Friday will be a beautiful day with sunshine and highs in the 70s. Enjoy the cooler weather because a big warming trend will begin over the weekend. Highs will warm into the 80s to lower 90s by Sunday and most areas will be in the 90s next week.