StormTracker 9 Forecast: Heat blast continues Wednesday

Heat blast continues Wednesday before cooling to near seasonable temperatures.

Posted: Aug 28, 2019 9:52 AM
Updated: Aug 28, 2019 10:09 AM

EUGENE, Ore. -- Congratulations! If you're reading this weather blog, then you survived the record heat on Tuesday.

We saw 100s in many of our inland communities and broke records in Eugene and Roseburg. Even the coast saw temperatures ranging from mid-70s to mid-80s, depending on where you live. With Eugene reaching 101 yesterday, it made yesterday not only the hottest day of the summer thus far, but the hottest day of 2019 so far. It was also the first 100 Eugene has seen since Aug. 3, 2017.

Fast Forecast:
Wednesday: Sunny w/ slight chance. Highs in mid to upper 90s
Thursday: Mostly sunny w/ slight chance. Highs in mid to upper 80s
Friday: Partly sunny. Highs in mid to upper 80s
Saturday: Sunny. Highs in low to mid 80s
Sunday: Partly Sunny. Highs in low to mid 80s
Labor Day: Mostly sunny. Highs in low to mid 80s
Tuesday: Partly Sunny w/ slight chance. Highs in low to mid 80s

Wednesday will not be as hot as Tuesday, but we'll still be tracking hot temperatures across our area. The only exception will be the coast. This is due to weak onshore flow allowing the marine layer fog Wednesday morning and a sea breeze this afternoon. Inland, a thermal low-pressure center over the Columbia Basin will strengthen, in turn cutting off the northeasterly winds and bringing more southerly winds.

Losing the northeasterly winds means we lose the downslope winds we had that warmed our temperatures in the valleys and lowered the relative humidity. Downslope winds occur when warm, dry air descends rapidly down a mountainside. Downslope winds really increase fire danger, hence why we had red flag conditions on Tuesday.

Despite this wind shift, heat advisories remain in place for the Umpqua Basin and the Willamette Valley. Highs Wednesday inland will reach into mid to upper 90s. With a heat advisory, remember to wear light, loose clothes, drink plenty of water, and limit your outdoor activity. This is due to the threat of heat-related illnesses.

Big changes arrive tonight, with a weak shortwave passing through from the south. This will bring the threat of isolated thunderstorms in the Cascades. There are still some questions as to the amount storms as the shortwaves move through dry air. If thunderstorms do form, then new lightning-caused wildfires are possible.

Morning clouds will persist on Thursday morning, but sunshine will return during the afternoon. Temperatures will be cooler, but more seasonable. Thursday afternoon will also see the threat for afternoon thunderstorms in the Cascades.


Friday will see more clouds in the mornings with afternoon sunshine with temperatures remaining in the 80s. Through the Labor Day weekend, expect mostly sunny skies and seasonable temperatures. There is a low coming out of the Gulf of Alaska, but there are questions in the models about where that low will track. Right now, we only have a slight chance of moisture early next week. We will keep you updated.

For more weather information, go to the KEZI 9 News StormTracker 9 weather page.

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Multnomah8955159
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Washington561274
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Clackamas306165
Lane229427
Malheur189737
Jackson16176
Deschutes109813
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Linn78815
Polk64315
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Morrow5436
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Klamath4053
Wasco34715
Douglas3425
Hood River2771
Josephine2623
Columbia2531
Clatsop2370
Coos2360
Baker1143
Crook1002
Tillamook700
Curry571
Wallowa402
Lake340
Harney210
Sherman180
Gilliam110
Grant110
Wheeler10
Unassigned00
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