Yeah the duration is certainly a question, but then again, duration of higher heat events is always trickly here just because of our geographical proximity to Canada and vulnerability of fronts moving through. I guess the question would be, do any fronts completely alter the pattern or would it just be a case of multiple days of average temps before we blow another warm front through and bring in another round of heat?
Magnitude isa challenge too, but that is a very large plume of ~+25C 850 temps being modeled into the OV...doesn't take much to really break some of that off and send it our way, especially ahead of a front or even build the airmass in if ridging expands east.