Today is sketchy for most of western Montana in terms of flooding risk. Even flash flooding could occur if Tuesday storms aren't dry lightning situations. It's sort of a 'no win' on Tuesday.
Daytime temperatures are expected to hit 100 degrees or more on Monday and Tuesday for a large chunk of the northwest. Heat Advisories and Fire Weather Watches are in effect for eastern Washington and western/northern Idaho.
In Shepherd, Montana, the storm hit with little warning, pelting homes and vehicles with massive hailstones that caused widespread damage in just minutes.