PORTLAND, Ore. (KATU) — A brief early-summer warmup is expected across northwest Oregon and southwest Washington, with temperatures climbing into the upper 80s and potentially the low 90s by Tuesday before cooling back to more seasonable levels midweek.
High pressure is expected to persist through Tuesday, bringing mostly sunny skies and a steady warming trend each day.
Moderate heat risk is expected along the I-5 corridor north of Salem, including the Portland/Vancouver metro area, as temperatures potentially warm into the upper 80s to lower 90s…