Above normal temperatures in the 80s and 90s will spread across much of the West under upper ridging as a low-level thermal trough moves into the Great Basin and Inland Northwest. Relative humidity is likely to remain low at 6-20% across the northern Intermountain West and spread near and east of the Divide from central Montana south through Wyoming into northern Colorado. Unstable conditions are likely in the vicinity of the thermal trough with fires likely to be active, but smoke may limit the amount of heating and instability. West winds of 10-20 mph with gusts 20-30 mph are possible along and east of the Divide in Montana for elevated conditions, especially in areas that did not receive rainfall late last week. Isolated to scattered mainly wet thunderstorms are likely across the southern California mountains into the central and southern Sierra, then east through the southern Great Basin and across the greater Four Corners area. A few isolated mixed wet and dry thunderstorms may develop across the northern Sierra into the southern Oregon Cascades. Gulf of Mexico moisture will continue to stream northward with scattered to numerous showers and thunderstorms from the Southeast to the Great Lakes and Mid-Atlantic, with the heaviest rain likely in the vicinity of Lake Michigan. http://www.predictiveservices.nifc.gov/outlooks/outlooks.htm