blocking high

Any high (or anticyclone) that remains nearly stationary or moves slowly compared to the west-to-east motion upstream from its location, so that it effectively blocks the movement of migratory cyclones across its latitudes. Also known as blocking anticyclone.

Related terms:

• blocking
• blocking anticyclone
• subpolar high
• arctic high
• subtropical high
• warm high
• high aloft
• glacial high
• upper high
• high-pressure area