So for this Friday, based on models, the 850 temps appear to be around a +16. This is the lowest I'd like to see for a 90F+ in Portland (+15 can be acceptable if there is ample downslope winds. Temperature potential is 89 given a 1020 mb pressure (what said models are forecasting). However, downslope winds are expected which may make the true temperature potential higher. I'm still going to stick with 89 for now, though the true potential is at 92-94 (depending on wind speed) if 850s don't change.
May 28th, 1983 stayed below temperature potential (107F), and June 2021 at Salem already was cooling down at the highest 850s at sounding time, though the day before was a +0.2F above potential. If I had to guess, the 30.4C 850s weren't the highest at sounding time compared to earlier that day.
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