by DHMZ
Turbulence generally appears in the zone of high horizontal and vertical wind shear, around the jet streak, but most frequently on the left-hand side below the level of the jet core, or on the right side above the level of the jet core. Furthermore, a sharply curving jet stream on the pole ward side of a Warm Front Shield, is associated with greater turbulence than a straight jet stream behind the Cold Front. Jet fibres are often considered a good indication for clear-air turbulence (CAT) which may affect flights at high levels and is a major cause of discomfort and disruption to passengers in flights.
Associated with the Subtropical Jet Stream (STJ), but separate from it, areas of tropical CAT are observed. These may be identified by their high-cloud signature, cirrus ribbons.
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Precipitation |
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Temperature |
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Wind (incl. gusts) |
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Other relevant information |
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09 October 2009/06.00 UTC - Meteosat IR image
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09 October 2009/06.00 UTC - clouds and precipitation observations from synop reports
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09 October 2009/06.00 UTC - cloud type observations from synop reports
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