For Blocking High we have a term and definition in Weather.

Blocking High (Weather)

The development of a warm ridge or cutoff high aloft at high latitudes which becomes associated with a cold high at the surface, causing a split in the westerly winds. Such a high will move very slowly, tending to move westward during intensification and eastward during dissipation. It prevents the movement of migratory cyclones across its latitudes.
Related terms: cut-off high and Omega block

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