Parades of storms and rain set to rattle in northwest region of United States

Monday, November 6, 2023

The Northwest region of the United States is facing a barrage of storms, with an active jet stream bringing a continuous deluge of rain and high-elevation snow.

After two recent storms, which brought heavy rainfall and strong winds, another storm is set to impact the area early in the week.

As of Monday morning, significant rainfall has been recorded, with 3.07 inches at Seattle-Tacoma International Airport and 3.01 inches in Portland, Oregon. Parts of the Olympic Mountains and the Cascades have received over 8 inches of rainfall. The storms have also generated gusty winds, with Hoquiam, Washington, experiencing wind gusts of up to 62 mph during the first storm and 56 mph during the second.

The upcoming storm will continue the wet trend in the Pacific Northwest. It is expected to bring moderate rainfall and gusty coastal winds, increasing the risk of ponding on roadways, flooding in low-lying areas, and overflowing smaller streams. Unlike the previous storms, this one is expected to introduce colder air, lowering snow levels to around 5,000 feet and potentially bringing accumulating snow to higher mountain passes.

The Northwest can anticipate a brief respite from the wet weather midweek, but this dry period is predicted to be short-lived. Forecasters anticipate another storm to approach the region later in the week, bringing heavy rain, gusty winds, and mountain snow. Snow levels are projected to drop to around 6,000 feet during the day and as low as 4,000 feet overnight, possibly even lower in some areas of the Cascades.

Travelers, especially those planning to traverse mountain passes like Snoqualmie Pass, should be prepared for challenging and slow travel conditions during this period. The cumulative impact of these storms is expected to bring significant rainfall, with localized areas experiencing up to 15 inches of rainfall across west-facing slopes of the Olympics, Cascades, and Coast Ranges. Meanwhile, cities like Portland and Seattle are likely to see total rainfall between 2 to 4 inches through Tuesday, further emphasizing the need for caution and preparedness in the face of this prolonged, inclement weather.

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