That's literally the last 7 days available. I didn't "pick" anything.
Someone said it was a few barely below normal days. Seems that regional maps of the last 30 days and 7 days are relevant.
Thermal runaway is a myth. That is all a forced pattern response.
Tropical forcing isn’t reminiscent of 2015 (yet) nor will the pattern be for the foreseeable future. But as we discussed a couple weeks ago, it is likely the pattern will trend warmer later in June into July in response to *sub*seasonal variability in tropical convection (basically the combination of BSISO progression and onset of E-Hem monsoonal forcing).
But don’t make the same mistake everyone else does in reading too much into model guidance attempting to resolve sub-seasonal variability in the extended range.
Tl;dr I don’t see any extreme heat signals for the PNW at this time. Apologies in advance to the forum heat misers.
SPC gets it up your way. I wouldn't be surprised to see a shift north into northern Illinois and Indiana just based off where the hot spots have been this year.