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Flashcards in 250 hpa and high level prog charts Deck (7)
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1

Jet streams are usually found:

10-15km above the earth's surface

2

Is the jet stream stronger in the winter or summer? why?

Winter. there is a stronger surface temperature contrast

3

We say that jet streams are of _________ origin

thermal

4

the thermal wind is oriented with ______ to the left and ________ to the right

cold air
warm air

5

In order for a current to be classified as a jet stream, each point on its axis must have a minimum speed of

60kts

6

What are the speeds of a weak, moderate and strong jet stream

weak = <120kts
moderate = 120-150 kts
strong = >150kts

7

Define horizontal wind shear

The difference in wind speed over a horizontal distance, measured in a direction perpenducular to the current.