What type of weather occurred on either side of the jet stream on the map? ?

Blog Category: cfzr.com — Blogged by: mike on March 10, 2010 at 9:45 pm
  • What type of weather occurred on either side of the jet stream on the map?

    This is the Map Link; please i need help;

    http://www.weather.com/maps/activity/avi...


    and how did you find that out?


  • The jet stream comes from a kink in the tropopause; the top of our atmosphere. Where the mild subtropical air meets the cold polar air, it creates a front. On the top of it, the altitude of the tropopause makes a sharp change, hence the kink. There, warm air flows over the cold one and the cold over the warm. Because of the Coriolis, it turns to the right and form a spiral moving eastward.

    In the illustration above, the cold polar air has moved over the east side of the US, bringing the front and the jet stream with it.

    A low pressure is drawn off the Californian coast. It has nothing to do with the jet streams, though. Polar lows have their center right on the front and the jet streams.

    Mind you, the jet streams are sometimes weak and not general pattern can be drawn. That happens at the average of three times a year, in June, September and December. But sometimes it doesn't happen, or it is much delayed in the year.

    Sometimes the jet streams are going in strange directions. Last spring, I was checking the weather because I have a light aircraft that I fly often and over Norway, where I live, there was a jet streams going north and, above it, one going south. Since the carry wind that can reach 200 mph, you understand that I didn't wanted to be the pilot in the turbulence between those two layers of strong winds!

    Anyway, on each side of the jet streams, there are air masses of different temperature: warmer in the south and colder in the north.


  • Generally, on the North side of the Jet Scream, it's cooler. On the south side, it's warmer.


  • The jet stream is just two air masses with different temperatures coming together. In the northern hemisphere, north of the jet stream tends to be cooler weather while south of the jet stream tends to have warmer weather.







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