PORTLAND, Ore. (AP) — An Arctic front pushed by a strong Arctic high will move into eastern Washington and Oregon Tuesday night. The frontal boundary will be quite dry and breezy, and northeasterly winds will accompany the front.
Temperatures will drop significantly with and behind the Arctic frontal boundary. Low temperatures will plummet into the single digits to mid-20s by Wednesday morning. High temperatures Wednesday will struggle to reach the 30s in central Oregon and mid-20s to near freezing elsewhere.
An approaching weather system Wednesday night will increase cloud cover and moisture across Oregon and central Washington. The arctic high will move further east and allow the airmass in place to moderate.
A weak front will move across Oregon Thursday.
The triple point (and best lift) will remain in southern Oregon, but it may provide sufficient lift to bring a slight chance of snow or a mix of rain and snow to Oregon.
By Thursday night, another Arctic low will come down from British Columbia but the GFS has a weaker feature.
Either way, there is a slight chance of snow in the Lower Columbia Basin, and higher chances over the higher elevations Thursday night and Friday.
A reinforcing shot of Arctic air may follow the arctic low to keep the temperatures in the mid-teens to mid-20s Saturday night.
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Powerful ocean storm blasting Alaskan islands
RACHEL D’ORO, Associated Press
ANCHORAGE, Alaska (AP) — Near hurricane-strength winds blasted parts of Alaska’s Aleutian Islands as the remnants of Typhoon Nuri moved through the remote region hundreds of miles from the mainland.
The island is home to the U.S. military’s Eareckson Air Station, which serves mainly as an early warning radar installation. Acting manager Don Llewellyn said no one was going outside, but people can see light poles waving.
But toward evening, the winds had eased enough to allow personnel to get outside and check for any storm damage, said Tommie Baker, public affairs officer for the Alaskan Command.
“A couple of the buildings had some minor damage, but there were no injuries,” he said. “They are going to let it pass through a little bit more and (then) go out and do a full island assessment.”
He estimated that by 5 p.m. Friday, sustained winds had dropped to 45-65 mph with gusts of 80 mph.
The brunt of the storm is expected to pass into the Bering Sea and lose strength, but forecasters warned it will still push unseasonably frigid air into much of the U.S. next week.
“It’s going to slowly weaken all the way through Sunday,” National Weather Service meteorologist Jason Ahsenmacher said. “It’s going to be a very slow process.”
Forecasters said waves could be as high as 50 feet, prompting ships and fishing vessels to get out of the storm’s path or seek protected harbors.
Ahsenmacher said late Friday night that he hasn’t heard of any problems regarding shipping.
“Most mariners know about this storm and they are trying to stay away,” he said.
The storm was expected to surpass the intensity of 2012’s Superstorm Sandy and has the potential to be one of the most intensive to ever hit the North Pacific, meteorologists said. But while Sandy was blamed for at least 182 deaths and $65 billion in damage on the East Coast, Nuri’s target is a sparsely populated region with just a few small communities where people are accustomed to severe weather.
Friday’s high temperature was in the mid-40s in Shemya, which is in a sub-polar region that doesn’t get the same bitter cold as Alaska’s interior. But the island 1,500 miles southwest of Anchorage gets plenty of extreme weather, including 100-mile winds. The community averages six weather-related lockdowns a year, Llewellyn said.
“This is nothing new to us,” he told The Associated Press in a telephone interview. “This one’s a little bit more intense, but it’s something that we’re prepared to deal with.”
The system is expected to freeze much of the lower 48 states next week, forecaster Bruce Sullivan said. Snow also is coming to areas including the northern Rockies and northern Plains.
In Great Falls, Montana, the high temperature is predicted to be 17 degrees Tuesday, compared with the normal high of 43, Sullivan said. The forecast for Sioux Falls, South Dakota, is a high of 25, which is about 20 degrees below normal. High temperatures in Minneapolis will only reach the upper 20s.
Amid prospects that the storm could dip into the upper Midwest, National Weather Service meteorologist Gino Izzi in Chicago offered a warning to that region’s populace: Winter is about to hit, sooner there than usual.
Izzi said highs there are expected to settle into the 30s from Tuesday through Friday, while nightly lows could drop into the 20s, perhaps even the teens.
“It doesn’t look real promising for a warmup after that, either,” he said of the longer-range forecast that meteorologists hadn’t sorted out by Friday.
In Sioux Falls, weather service meteorological technician Tim Masters said temperatures will be colder than average but won’t break any records.
“We’ve been above normal most of the fall, so this is our first shot going the other way being below normal,” he said. “Basically, this is a wakeup call that this is November and it can get pretty cold this time of year. Hopefully we don’t stay that cold very long.”
In the Aleutians, the storm’s path includes a busy maritime route for cargo ships traveling between the U.S. and Asia, as well as the red king crab fishery made famous by the Discovery Channel reality show “Deadliest Catch.” Mariners were finding protected harbors or moving away from the path, according to Brett Farrell with the nonprofit Marine Exchange of Alaska. No one in their right mind would stick around that area, he said.
Officials are also closely watching the western coast of Alaska’s mainland, according to Jeremy Zidek, a spokesman for the state Department of Homeland Security and Emergency Management. Fall storms routinely batter many coastal communities, and erosion has long been a problem.
Follow Rachel D’Oro at https://twitter.com/rdoro . Associated Press writers Jim Suhr in Illinois and Carson Walker in South Dakota, and AP Science Writer Seth Borenstein in Washington, D.C., also contributed to this report.