The unusually warm water acts on jet stream patterns, altering weather worldwide.
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A vigorous jet stream pattern will prevail across the nation Friday and Saturday.
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The jet stream pattern will undergo a significant change this weekend.
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On average, the jet stream patterns in the northern and southern hemispheres are very different.
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Meteorologists call the unusual jet stream pattern an omega block because it resembles the Greek letter.
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Additionally it was found that these jet-stream patterns often lead to persistent weather patterns that result in extreme weather events.
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A contorted jet stream pattern will develop across North America this weekend, resulting in several days of unseasonable chill in the Northeast and Northwest.
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When a big storm develops the jet stream pattern becomes contorted providing added energy for storms at several spots many thousands of miles apart.
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The heatless streak is the legacy of a recurrent jet stream pattern that has prevented surges of heat from reaching most of the Northeastern states.
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Dozens of high and low temperature records were set across the country in recent days because of an abnormal jet stream pattern covering North America.
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