Lately, the jet stream isn’t playing by the rules. Scientists say that big river of air high above Earth that dictates much of the weather for the Northern Hemisphere has been unusually erratic the past few years. They blame it for everything from snowstorms in May to the path of Superstorm Sandy…The current heat wave in the Northeast is also linked. "While it’s not unusual to have a heat wave in the east in June, it is part of the anomalous jet stream pattern that was responsible for the flooding in Alberta," Rutgers University climate scientist Jennifer Francis said Tuesday in an email.
/ / / Weather extremes tied to jet stream