During the past few weeks, a big swing northward, forming what's called a "ridge" of persistent atmospheric pressure, persisted off the West Coast along with a deep southward dip, or a "trough ...

“The entire winter the US went without a strong ridge-trough pattern of this magnitude,” CNN meteorologist Brandon Miller said. A ridge-trough pattern is when the jet-stream – a stream of ...

Impressive ridging has returned along the West Coast along with a trough centered near the dateline ... the West Coast is in large part due to the ridge blanketing the region.

A minor dip in temperatures is expected for the end of the workweek as a trough of low pressure weakens the high pressure ridge over the west. Temperatures ramp back up this Father's Day weekend ...

“As we head into the weekend the weather map is changing as a trough pattern pushes the ridge out of the way, and sends a cold front up the country,” she added. By Friday night this cold front ...

We’ve got upper 50s to low 60s this afternoon with the winds kickin' up along the coast. High pressure is in control, while a weak trough is setting up, and that’ll allow more clouds to develop this ...

Your plans for the forthcoming long weekend will be impacted by where you are located in our very wavy jet stream pattern across Canada, with a strong ridge and a strong trough dominating the country.

Blues are lower than normal pressure (trough) and the purples are higher than normal pressure (ridge). It’s beginning to look a lot like December and, depending on where in the Pacific you’re ...