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All Blocked Up

Good morning,
Like a downspout on a house or a hair clogged drain, our weather pattern gets all backed up the rest of the week. A blocking high pressure system called a "Rex Block" takes over into the weekend. In the graphic below note the backward S appearance of the jet stream. A Rex Block sets up typically with a strong high pressure ridge right next to a strong low pressure trough. The air curves around the ridge then around the trough. That means the air flow makes little progress and can mean an extended period of dry, warm weather.
Click to enlarge
Brett

Posted by at April 13, 2005 5:04 AM