| 1. | Its wind field can join with the wind field of the polar jet stream.
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| 2. | The Polar jet stream would carry the balloon over California and the middle of the United States.
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| 3. | The vortex creates the polar jet stream which can be used to boost their glider to fly to the height proposed.
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| 4. | A strong disturbance embedded in the polar jet stream will help deliver mild, moist air to the Pacific Northwest on Friday.
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| 5. | The polar jet stream, the strong high-level wind current that provides energy for storms, sometimes divides into two branches.
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| 6. | _In the Northeast, a polar jet stream and tropical jet stream will duel for supremacy, and the polar stream will win.
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| 7. | Control center said it had opted for this route rather than the Polar jet stream that passes over California and the U . S . East Coast.
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| 8. | The polar jet stream, which moves in a west to east direction across the middle latitudes, advancing low pressure systems, storms, and fronts.
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| 9. | Saturday, Sunday : The deep chill of winter will remain well north of the U . S .-Canada border as the polar jet stream retreats northward.
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| 10. | The northern Polar jet stream is said to " follow the sun " as it slowly migrates northward as that hemisphere warms, and southward again as it cools.
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