Forecasters: Jet Stream Isn’t Playing By The Usual Rules

WASHINGTON June 25, 2013)--The jet stream, that river of air high above Earth that generally dictates the weather, hasn't been playing by the usual rules and that’s what’s behind everything from Alaska's recent heat wave to the direction of Superstorm Sandy last fall, scientists say.

The jet stream normally moves in a fairly straight line from west to east, but recently its pattern has been more erratic.

Jeff Masters, meteorology director at the private service Weather Underground, says the jet stream's activity in the past three years has been unlike anything he's seen.

Some research ties it to a warmer Arctic from climate change, but scientists are divided over whether that's the cause.

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