‘Pineapple Express’ elevates rain, flooding concerns across the Northwest

Yet another late season 'atmospheric river of moisture' is set to bring steady rainfall to the Eastern Washington and Oregon.

Rain Radar - Pineapple Express

A ‘Pineapple Express’ setup will be responsible for more than an inch of rain in some portions of Eastern Washington and Oregon Friday and Saturday.

Yet another rainy weekend forecast for the Tri-Cities, Yakima and Walla Walla comes after an already unusually wet late spring season.

Over the next 48-56 hours, the Cascades and the Blues look to receive between 1 to 3 inches of new rainfall. The expected precipitation, coupled with melting snowpack, is adding to flooding concerns for some valley rivers and creeks…and burn scars in the higher terrain.

Showers will continue in the lower elevations off-and-on Friday afternoon through Sunday morning in the lower elevations, with steady to heavy rainfall possible at times. Conditions should begin to dry Sunday afternoon through the start of the next week.

Radar - Pineapple Express

SPRING PRECIPITATION BY THE NUMBERS

TRI-CITIES 

June 2022 To Date: 0.13″
June Normal: 0.16″
May 2022 Total: 0.96″
May Normal: 0.71″
April 2022 Total: 1.93″
April Normal: 0.66″
March 2022 Total: 0.60″
March Normal: 0.69″
Total Precipitation 2022 To Date: 4.31″
Normal Precipitation To Date: 3.91″

YAKIMA

June 2022 To Date: 0.58″
June Normal: 0.13″
May 2022 Total: 0.85″
May Normal: 0.74″
April 2022 Total: 0.57″
April Normal: 0.55″
March 2022 Total: 0.11″
March Normal: 0.64″
Total Precipitation 2022 To Date: 0.58″
Normal Precipitation To Date: 0.15″

WALLA WALLA

June 2022 To Date: 0.82″
June Normal: 0.34″
May 2022 Total: 3.66″
May Normal: 2.07″
April 2022 Total: 2.75″
April Normal: 1.98″
March 2022 Total: 1.69″
March Normal: 2.11″
Total Precipitation 2022 To Date: 11.25″
Normal Precipitation To Date: 10.24″

A Pineapple Express is a type of weather phenomenon known as an atmospheric river.

A narrow band of moisture, typically only about 250 miles wide, atmospheric rivers carry heavy rain and strong winds.

If the atmospheric river originates near Hawaii, it’s called the Pineapple Express.

FIRST ALERT WEATHER HEADLINES FROM THE KAPP-KVEW NEWS STAFF:

WATCH: Rain and storms will move across the Mid-Columbia today and tomorrow