What Is Zonal Flow?

Tools

By By Steve Pool

SEATTLE - My first response is: "A great suggestion for a band name in the Northwest", but in actuality, zonal flow can be responsible for thwarting many outdoor concerts.

For us, zonal flow is the term we use for when a strong jet stream is moving due east across the Pacific Ocean and plowing straight into the Pacific Northwest. This pattern usually brings several storms one-after-another in rapid succession through the area.

Most of the time, it means storms can be blowing through the area every 24-36 hours. And even between storms, with the moist flow, we stay cloudy with frequent showers between storms, making it difficult to tell when one storm stops and the next begins.

These patterns can last for up to a week or even 10 days, and certainly help to give Seattle its rainy reputation.

Your Photos

YouNews Horse Show in Heritage Park Horse Show in Heritage Park
Photographed at the Andalusian/Lusitano Horse Show in Chilliwack, BC. Also being shown were some Friesian Horses.
YouNews Mercedes Ride Mercedes Ride
My neighbor with her dog in her convertable. She takes him up to a long term care home up in Delta, BC every Sunday to visit with the residents there.
YouNews Clear Skies Return Clear Skies Return
These images were taken Saturday night/Sunday morning.
The deep space images were taken with a 5 inch refractor
(APO) and a QSI imaging camera.