Charleston would likely still be as warm or warmer than North Bend in that setup. The solar heating of the boundary layer is very intense out here in May, usually underestimated by guidance when there is cold air aloft+offshore winds.
We just got hit here in Ballard by the core of that midlevel shower passing over Seattle. Large raindrops, hence the higher reflectivity on radar, but oddly no cloudcover, or even much of any clouds at all. Mainly just large raindrops amidst sunny skies with some disorganized accas. Maybe the clouds that formed those drops dissipated rapidly?