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A weather question

A weather question

A weather question

(OP)
I would like to know what keeps these high pressure areas stalled for weeks in one area?

RE: A weather question

Not enough driving winds to move them around. They need a nearby low pressure system to create wind. A large area of high pressure is like a fan pointing at the floor. It will tend to blow all other weather systems away, (floor dust moves away in all directions) which creates stable pockets of warm air, especially as cooler air from higher up warms when it gets compressed as it descends to ground level. A low pressure system is like a fan pointing up. It socks all other nearby systems closer, thereby creating large pressure differentials within shorter distances and that causes a lot of air to move around. They eventually collide and drift off in the confusion.
www.ventusky.com

RE: A weather question

(OP)
Watching the weather person tonight, it looks like the same old high pressure area that has hung around for the last 4 months is still there.
What can cause that? Its obvious that the main cause of weather extremes is high and low pressure areas and winds aloft and has nothing to do with gases. Do we not have a jet stream anymore?

RE: A weather question

Jet streams became less defined, weaken and move north during summer. Wait for winter to arrive, assuming that it will eventually.

RE: A weather question

The technical term is 'heat dome', and these remain in place until pushed out by an 'Alberta Clipper' or an 'Arctic Vortex'.

I am convinced that the sheer volume of BS jargon created by TV weather spokespeople is capable of changing weather patterns. Their hot air alone is a minor but significant contributor to global warming. (And why do they say 'your overnight'? It's not mine!)

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

RE: A weather question

we call it "storm-porn"

another day in paradise, or is paradise one day closer ?

RE: A weather question

Not a climate scientist but - the jet streams getting weakened, so its getting wavy and ill defined. The wobbly sections can "trap" a front over over a spot for an extended period (see PNW heat wave).

Whereas before the jet stream was general strong/tight (more or less circular), the weakened/wavy jet stream can cause regional issues.

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