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-   -   Jet stream question (https://www.pprune.org/tech-log/420080-jet-stream-question.html)

Lancelot320 4th Jul 2010 19:54
Jet stream question
 
Hi there !

I was quite sure that the minimum windspeed that qualifies as part of a jetstream is 60kt, but I just read some contradictory information on a weather chart, which says 80kt.
Which one's right ?
Thanks a lot guys

zonnair 4th Jul 2010 22:10
60kts is what i recall too?

Mansfield 4th Jul 2010 22:35
The American Meteorological Society states the following in their on-line glossary:
Currently, in the analysis of upper-level charts, a jet stream is indicated wherever it is reliably determined that the wind speed equals or exceeds 50 knots.
The upper and lower 80 knot isotach heights are typically shown on the upper-level chart below the jetstream core height.

Lancelot320 26th Jul 2010 13:18
Oww, haven't been around for a while, thanks for your answers, guys :) here in Europe, seems like the 60kt answer prevails.
Regards


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