Colorado State University’s Department of Atmospheric Science has released their extended forecast for the 2018 hurricane season in the North Atlantic, and while they’re not calling for the same magnitude of devastating, record-breaking storms from the 2017 season, they sill expect this year to see higher than average activity.
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A combination of a series of three storm systems and a blast of Arctic air are prompting forecasts of an extended cold snap across the US, with temperatures in some parts of the north-central states expected to dip as low as 30ºF below normal. The regions expected to be affected include the Upper Midwest, Great lakes, Ohio Valley, Mid-Atlantic, and New England.
Mashable’s Andrew Freedman describes the February-like conditions that are visiting the continent as yet another consequence of the polar vortex pushing Arctic air in a southeasterly direction. 12 inches of snow is forecast for higher elevations in West Virginia, Virginia, and Maryland, with Philadelphia, New York City, and Boston possibly seeing lighter snowfall on Saturday.
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East Antarctica’s Totten Glacier has been revealed to be more unstable than previously anticipated. New research has found that portions of the glacier that were thought to be on stable ground are actually floating on seawater, prompting concerns over the ice sheet’s stability, and its potential to significantly contribute to the acceleration of sea level rise.
Totten Glacier is a flowing ice field that is more than three-quarters the size of Texas, and holds a massive volume of ice that could raise sea levels by 3.5 meters (11.5 feet) if it were to completely melt.
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Last month’s split in the Polar Vortex caused two distinct sections of the typically-persistent low-pressure zone to push south; one into western North America, and the other into northern Siberia. In North America, this resulted in a massive cold snap on the west coast, while the east experienced above-average temperatures.read more