- Example of a PRESYG

• A complete synthesis of the synoptic / sub-synoptic elements ;

  • example : 24h PRESYG forecast

• the situation for the south of France :

• under the influence of an upperlevel dynamics acting onscending motion (left exit of a jet ; ahead of a tropopause anomaly)

• low level warm advection(broken warm front symbol)

  • situation very propitious to thunderstorms

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