Cold season temperature inversions

From about November to February temperature inversions accompanied by low clouds and fog are a common weather feature in the Columbia Basin. These are not unique to the Columbia Basin with many valleys throughout the Western United States and the world also experiencing strong inversions, including the Salt Lake City area in Utah and Almaty, […]

Continue Reading

Elevated earthquake activity at Mount St. Helens but no eruption imminent

An increase in seismic activity beneath Mount St. Helens that started on July 15, 2023 continued this week, reports the Cascades Volcano Observatory. Seismologists were able to locate nineteen earthquakes this past week a few miles below the volcano’s summit bringing the total for this earthquake swarm to 465. All of these earthquakes have been […]

Continue Reading

Hurricane-force storm in Alaska to bring rain and mountain snow to most of the West Coast

A rapidly intensifying low pressure system is moving north through the Gulf of Alaska on Wednesday afternoon. It is forecast to make landfall on or near Alaska’s Kenai Peninsula early Thursday morning. Off the coast of Alaska, hurricane-force winds are forecast to extend eastward from the Kenai Peninsula toward the southeastern portion of the state. […]

Continue Reading

Cool and wet weather returning to the Northwest this weekend

Ridging over the Pacific Northwest on Wednesday along with a strong low in the Gulf of Alaska are driving mostly sunny and seasonably warm conditions in the Portland area. Meanwhile to the north, a Pineapple Express has been aiming at Vancouver Island, producing up to 200 mm (8 inches) of rain. This Pineapple Express is […]

Continue Reading

Fake monsoon bringing possible t-storms Monday and Tuesday

Showers were already being observed in the Columbia Basin and Yakima Valley before 04:00 Monday thanks to an upper level low pressure system centered near Central Oregon. This pattern is pulling moisture up from the southeast in a setup similar to what occurs during monsoon season late in the summer. I’m labeling it a fake […]

Continue Reading

Heat for the weekend, t-storms possible Monday

Ridging is building over the American West today into the weekend, leading to a regional heat wave in the Pacific Northwest. Above average temperatures are forecast for the Columbia Basin, though things aren’t looking quite as warm as they were originally expected. The Tri-Cities can expect a high in the mid 80s on Friday and […]

Continue Reading

Some clouds Wed afternoon with heat wave on tap this weekend

Tri-Cities weather May 10, 2023 Starting the day with just a few clouds moving about the Columbia Basin. A weak trough is forecast to pass overhead so that with daytime heating, cumulus development is likely starting midday for partly cloudy skies this afternoon. Scattered thunderstorms in the mountains will add some high clouds to the […]

Continue Reading

Rain showers and mostly cloudy Tue, heat wave this weekend

Tri-Cities weather May 9, 2023 An upper level low pressure system is moving eastward into the Northern Rockies Tuesday morning. Rain showers and isolated thunderstorms, mostly south of the Tri-Cities, will taper off into midday as the low moves deeper into Idaho. Maybe some clearing midday before clouds from mountain thunderstorms develop this afternoon. An […]

Continue Reading

Rain showers and breezy Friday, drier and warmer Saturday

Tri-Cities weather • Friday, May 5, 2023 Expect mostly cloudy skies throughout the day with off and on light rain showers. With the San Francisco low that drove our conditions most of the week having moved off toward the northeast, we no longer have warm moist air being pulled in from the south. This takes […]

Continue Reading

Increasing clouds Thu, t-storms tonight, breezy Fri

Tri-Cities weather May 4, 2023 Partly cloudy skies to start the day. These are mostly high clouds drifting north from thunderstorms in mountains to the south and east. Increasing clouds for the remainder of the day which will moderate highs compared to yesterday. Look for temperatures reaching the mid to upper 70s. The Storm Prediction […]

Continue Reading