Chief Meteorologist Justin Stapleton’s Wednesday Forecast Discussion
Four days of mid to upper 9os heat for Western Oregon and the finale is still about 24 hours away.
By Thursday and Friday, a strong ridge of high pressure builds across the Northwest, while a “heat low” or thermal trough will move in from California. Those conditions combined will bring some major heat- highs will be at 100 degrees on Thursday and likely upper 90s on Friday inland and mid 80s at the coast!
Because of the heat, the Willamette Valley is under an Excessive Heat Warning from Thursday at 1pm to Friday 9pm. Folks with heat sensitivities and/or anyone that will be outside during the peak heating hours in the afternoon should make sure you can find some shade, take breaks, and plenty of water. That includes everyone headed to the Lane County Fair over the next couple of days.
The Buckhead fire complex is still burning about 250 acres outside of Westfir, and over the next couple of days, offshore winds will bring the smoke into the valley. So our air quality will continue to suffer in the “moderate” category likely for the next few days.
The heat will finally break down (slowly) on Saturday with winds switching to in off the ocean. Highs will fall back into the upper 80s and low 90s. However, an upper level low swinging north offshore and the highly unstable air overhead, will trigger some hefty thunderstorms for both Saturday and Sunday in the mountains.
Next week we’ll be back to a more seasonal forecast with highs in the low 80s and morning clouds giving way to afternoon sunshine.
Have a great Thursday!
Chief Meteorologist Justin Stapleton
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