Northwest to experience a case of weather whiplash
By
Ryan Adamson, AccuWeather meteorologist
Updated Jun 6, 2021 4:21 AM EDT
Families and boaters in Northern California say they’re worried about low reservoir levels as the month of June kicks off with a heat wave baking the region.
A change in the weather pattern is likely to have residents of the Pacific Northwest asking whether it is summer or fall that is on the doorstep.
After the jet stream retreated well to the north earlier this past week, it has since dipped south of the region. This shift is ushering in much cooler air as well as increasing the chances for some precipitation.
"A series of storms will come ashore in the Pacific Northwest during the next five to seven days, bringing with them waves of cool air," said AccuWeather Senior Meteorologist Mike LeSeney.
Portland, Oregon, set a record high of 95 degrees Tuesday. Although Wednesday's high of 90 degrees was well shy of the record high of 98 degrees, this was still 18 degrees above normal. This weekend, the city will only have temperatures top out in the 60s.
Farther inland, the turn to cooler weather will take longer to occur.
Boise, Idaho, will be one such city where the cooldown is delayed. Thursday's high of 103 degrees -- a new daily record high -- was followed by a high of 93 degrees Friday. During the weekend, temperatures peaked at 86 degrees Saturday and are forecast to reach only 77 degrees on Sunday.
In California, the lower temperatures will be even slower to arrive.
For example, Redding has had seven consecutive days over 100 degrees as of Friday. With the normal high being 86, temperatures in the lower 90s on Sunday will still be above normal.
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Similar gradual cooling is likely to occur by early this week in Central and Southern California.
Besides the lower temperatures, another notable change will be the return of wet weather. This will mainly be confined to western Washington and possibly northern Idaho.
"Rounds of cool, showery weather will sweep across the region throughout the weekend," stated LeSeney.
The cooler and wet weather will be good news for firefighters already dealing with a number of wildfires across the region. On Wednesday, a wildfire ignited near The Dalles, Oregon, prompting evacuations and forcing officials to close local highways, The Associated Press reported.
It is not out of the question that some wet snow could mix in with any rain showers across the highest elevations in the Washington Cascades. If any snow does fall, it will be well above pass level and no travel problems are anticipated.
"As a caveat to limited moisture coming to the West in general into early this week, spotty thunderstorms may erupt and dot the interior," AccuWeather Senior Meteorologist Alex Sosnowski said.
"Many of these storms may bring little to no rainfall, but occasional lightning produced from the storms could start fires," Sosnowski added.
Looking farther down the road, it does not appear that another stretch of extreme heat is likely through at least the end of this week. Temperatures are forecast to trend downward to more seasonable levels during the early and middle part of the week ahead.
There is even a chance a storm system could deliver some precipitation to parts of Washington, northwestern Oregon, northern Idaho and northwestern Montana around Wednesday or Thursday of this week.
Keep checking back on AccuWeather.com and stay tuned to the AccuWeather Network on DirecTV, Frontier, Spectrum, FuboTV, Philo, and Verizon Fios.
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News / Weather Forecasts
Northwest to experience a case of weather whiplash
By Ryan Adamson, AccuWeather meteorologist
Updated Jun 6, 2021 4:21 AM EDT
Families and boaters in Northern California say they’re worried about low reservoir levels as the month of June kicks off with a heat wave baking the region.
A change in the weather pattern is likely to have residents of the Pacific Northwest asking whether it is summer or fall that is on the doorstep.
After the jet stream retreated well to the north earlier this past week, it has since dipped south of the region. This shift is ushering in much cooler air as well as increasing the chances for some precipitation.
"A series of storms will come ashore in the Pacific Northwest during the next five to seven days, bringing with them waves of cool air," said AccuWeather Senior Meteorologist Mike LeSeney.
Portland, Oregon, set a record high of 95 degrees Tuesday. Although Wednesday's high of 90 degrees was well shy of the record high of 98 degrees, this was still 18 degrees above normal. This weekend, the city will only have temperatures top out in the 60s.
Farther inland, the turn to cooler weather will take longer to occur.
Boise, Idaho, will be one such city where the cooldown is delayed. Thursday's high of 103 degrees -- a new daily record high -- was followed by a high of 93 degrees Friday. During the weekend, temperatures peaked at 86 degrees Saturday and are forecast to reach only 77 degrees on Sunday.
In California, the lower temperatures will be even slower to arrive.
For example, Redding has had seven consecutive days over 100 degrees as of Friday. With the normal high being 86, temperatures in the lower 90s on Sunday will still be above normal.
CLICK HERE FOR THE FREE ACCUWEATHER APP
Similar gradual cooling is likely to occur by early this week in Central and Southern California.
Besides the lower temperatures, another notable change will be the return of wet weather. This will mainly be confined to western Washington and possibly northern Idaho.
"Rounds of cool, showery weather will sweep across the region throughout the weekend," stated LeSeney.
The cooler and wet weather will be good news for firefighters already dealing with a number of wildfires across the region. On Wednesday, a wildfire ignited near The Dalles, Oregon, prompting evacuations and forcing officials to close local highways, The Associated Press reported.
It is not out of the question that some wet snow could mix in with any rain showers across the highest elevations in the Washington Cascades. If any snow does fall, it will be well above pass level and no travel problems are anticipated.
"As a caveat to limited moisture coming to the West in general into early this week, spotty thunderstorms may erupt and dot the interior," AccuWeather Senior Meteorologist Alex Sosnowski said.
"Many of these storms may bring little to no rainfall, but occasional lightning produced from the storms could start fires," Sosnowski added.
Looking farther down the road, it does not appear that another stretch of extreme heat is likely through at least the end of this week. Temperatures are forecast to trend downward to more seasonable levels during the early and middle part of the week ahead.
There is even a chance a storm system could deliver some precipitation to parts of Washington, northwestern Oregon, northern Idaho and northwestern Montana around Wednesday or Thursday of this week.
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Keep checking back on AccuWeather.com and stay tuned to the AccuWeather Network on DirecTV, Frontier, Spectrum, FuboTV, Philo, and Verizon Fios.
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