| 11. | Sunday's record warmth was the signature of a warm high pressure system holding steady high over the Gulf of Alaska.
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| 12. | The reason for the rapid snowmelt has been an expansive ridge of warm high pressure centered over the Yukon Territory.
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| 13. | Record heat will envelop a large portion of the interior West as a warm high-pressure system builds across the region.
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| 14. | Later, warm high-latitude climates returned to the Antarctic Peninsula region during the Paleocene and early Eocene as reflected in fossil plants.
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| 15. | Barrow's warm wave was sponsored by a steadfast ridge of warm high pressure that stretched from western Canada to the Kuskokwim Delta.
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| 16. | Heat will intensify across the Pacific Northwest on Sunday as a ridge of warm high pressure tightens its grip on the region.
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| 17. | Meanwhile, record to near-record warmth will build in the Great Plains under the auspices of an expansive ridge of warm high pressure.
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| 18. | Record to near-record heat will continue to blister the Southeast as a sprawling warm high pressure system holds steady over the region.
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| 19. | Meanwhile, high heat will continue to build across the Southwest as an area of warm high pressure reigns in the upper atmosphere.
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| 20. | Elsewhere, searing heat will continue to plague much of Texas and the Plains as a warm high-pressure system persists across the region.
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