Weather-watchers were aghast Monday when images of a forecast shared online showed Oregon temperatures nearing 120 degrees early next week.
But National Weather Service meteorologists say that forecast is an outlier, and Portlanders shouldn’t expect high temperatures to exceed 105 degrees next week.
Next week’s temperatures could appear mind-bogglingly high or low, depending on which forecast model you’re viewing, said Miles Higa, a weather service meteorologist.
“Monday afternoon, 118 is the extreme high,” Higa said. “But at the same time the extreme low is 80.”
Most models predict average temperatures to be in the low 100s this weekend and early next week, Higa said.
Hot temperatures from the desert Southwest are expanding north and west, bringing a hot air mass into Oregon that will persist through the weekend, Higa said.
Weather service forecasts predict milder midweek temperatures in Portland, with highs peaking at 87 degrees Thursday. Conditions will begin heating up Friday, with high temperatures rising into the mid-90s.
Portland will likely enter into the low 100s this weekend, with high temperatures jumping to 102 degrees both days, Higa said. If the forecast holds, Sunday’s high would break a daily record of 98 degrees.
Conditions will be a smidgen cooler Monday, with high temperature peaking at 100 degrees.
Some are referring to the heatwave as a “heat dome” — a colloquial term used to describe a hot weather event like the one Oregon is facing, Higa said.
The heatwave could fuel wildfires burning on the Warm Springs Reservation and in southern Oregon.
“With the heat and dry air mass, fires could be more active,” Higa said.
The S-503 fire southeast of Mount Hood has burned more than 6,200 acres on the Warm Springs Reservation since Friday. The blaze is 10% contained, but afternoon winds, thunderstorms and lightning are expected to challenge fire crews, officials said Tuesday.
The Wasco County Sheriff’s Office on Tuesday lowered evacuation orders west of Kelly Springs Road from Level 3 “go now” to Level 2 “get set.”
The Cutoff fire, meanwhile, has scorched 1,150 acres of Bureau of Land Management property about six miles north of Bonanza, a small town in Klamath County.
The fire, which was reported Saturday afternoon, is threatening 125 structures. It’s now 12% contained.
A Level 2 “get set” evacuation order is in effect for residents east of Bly Mountain Road.
Klamath County Sheriff’s Office reduced evacuation orders for other nearby residents to a Level 1 “Get Ready” order Monday, officials said.
A burn ban issued for Multnomah County west of the Sandy River will go into effect at 8 a.m. Wednesday and remain until further notice. Fire officials cited limited rainfall, forecasted high temperatures and ongoing dry conditions as sources of concern.
— Catalina Gaitán; @catalinagaitan_
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Will Portland really hit 118 degrees next week? Probably not, forecasters say - OregonLive
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