An upper-level trough will slide southeast into the Northern Rockies as an associated cold front pushes south and east through Montana and Wyoming, mostly along and east of the Divide, and into the northern and central Plains. Ahead of the front, dry and gusty west-northwest winds are likely across central and southern Idaho into southwest Montana and central and southern Wyoming. Gusty southerly winds amid low relative humidity of 8-20% are likely in portions of South Dakota, Nebraska, and southwest Minnesota ahead of the front turning northerly behind it with little increase of relative humidity into the evening. Dry and breezy conditions are also likely in portions of the Inland Northwest. Winds will turn more northerly across the Northwest, Idaho, and Montana and eventually to the northeast or east by the evening and overnight. Hot, dry, and unstable conditions will continue south of the front across California and the southern half of the Intermountain West. Temperatures will cool behind the front with temperatures mostly in the 70s and 80s in much of the Northwest, Idaho, and Montana. Showers with isolated thunderstorms will develop behind the front along and east of the Rockies in Montana into northern Wyoming, northern South Dakota, and central Minnesota. Isolated drier thunderstorms are expected for northeast Utah, central and southern Wyoming, and the greater Four Corners area, with the greatest potential for new ignitions across central and southern Wyoming. Showers and thunderstorms are likely along the Gulf Coast and in the Southeast.