Jet Stream Question

greg2424

New member
Hi there,

I was just reading a jet stream map (attached) and wondered how the direction the jet stream flow is moving at any one time might affect turbulence. For example, if I were travelling from LHR to JFK, would I be more likely to feel bumps as the plane passed south of Iceland? Or would the bumps be more prominent as it crossed New Foundland? Or would it be possible that there would be no bumps?

I guess I'm asking how jet stream maps can be interpreted for turbulence potential.....

Many Thanks

Greg

turb.jpg
 

tb_neg

Administrator
Staff member
In general it's hard to say. I've found that rides can get bumpy if the jet stream is twisty, or extra strong, but it doesn't always mean that's the case. It's just one of many factors. I like to use the other maps which do some of the interpreting for you, like Transatlantic Eastbound.
 

greg2424

New member
Thanks a lot, I must have missed those maps. Couple of other questions if I may, or should I say observations that I'd be grateful if you could clarify:

a) The yellow lines are the jet streams?
b) The little white wave symbols, are they an indication of chop level?
c) The red areas are locations where turbulence is likely to be expected (does this marker ever change to indicate a heavier or lighter turbulence potential?)
d) Can you tell me what the green clouds are?

Many thanks in advance for any information you can tell me.
 

tb_neg

Administrator
Staff member
a) yes, yellow lines are jets
b) the single wave is moderate, the double wave means severe (not too common)
c) severity is indicated by the wave symbols in b, but yes, red is turbulence likely area
d) green clouds are storms

Those maps are the best, we are lucky to have them, thanks to Jeppesen.
 
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