Archive for December 31st, 2012
When the North Atlantic Oscillation is negative, Greenland is mild with an upper level ridge of high pressure overhead. Temperatures are often at or above -18C or 0F, which is warm compared to normal here during winter. This pattern tends to promote colder weather for eastern North America and western Europe, but when there is a positive NAO, it’s the […]
After this weekend’s snow across the Midwest and Northeast, two shots of arctic air will follow. The first shot drops over the region tonight as a high builds overhead but this will be short lived as another system spreads northeast later Monday into New Years Day. That system will enhance clouds and may produce some […]
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