"The general, overall trend is a gradual warming.
"Some years are hotter, some years are colder," he said. What is certain is that there will be a gradual increase in temperature through the years and more heat waves will come, though it's unknown how historic they will be. "When the ground is moist the sun first has to first go into evaporating that moisture out of the ground and then can heat the air, but when the ground is dry, as it is in a lot of the West, the sun just goes directly into heating the ground," said Adamson.Īdamson said it's unknown when another dangerous heat wave will arrive. The areas that experienced some of the higher temperatures may have not had enough moisture in the ground for the sun to evaporate, instead directing heat to the ground and air, noted Adamson. "It's going to get warm again in the Pacific Northwest, but not as warm as it just was," said Adamson. The same trend goes for other cities like Boise, Idaho, which are expected to rise 10 degrees above normal by Sunday and later lower to only 5 degrees above normal towards the end of the week. In Portland, Oregon, temperatures for the following week are expected to be in the upper 80s and low 90s, just about 10 degrees higher than their 80-degree normal temperature for early July. As the ridge weakens by mid to late next week, temperatures will slowly start to decrease in the Pacific Northwest. The increased temperatures are caused by a ridge, or an elongated region of high atmospheric pressure, that will start Saturday. Temperatures in Northwestern states like Oregon, Nevada and Idaho expect above average temperatures this weekend, increasing about 10 degrees above normal, according to the National Weather Service.Īs we go into next week, temperatures are expected to lower and level out, according to the National Weather Service. 'We are entering uncharted territory': Heat wave in the West 'virtually impossible' without climate change Expect high temperatures this weekend but 'nothing crazy' “As far as the Pacific Northwest is concerned, it doesn't look anything as extreme as what happened at the end of June will occur, but certainly there will be some hot days,” he said. He expects there to be another heat wave in the Southwest later this summer, but not so much for the Pacific Northwest. Typically, temperatures will lower to the mid-50s in a place like Portland, Oregon, but there was no break during the evening hours last week. The high temperatures were amplified by the heat that lasted through the night.
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