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Another player in the winter forecast is the polar vortex. Based on data from previous winters with a similar setup to the upcoming season, Pastelok said that February is the most probable time ...
Meteorologists shared their predictions for the winter. ... the eastern United States may experience a blast of bitterly cold weather in February if the polar vortex strikes the eastern part of ...
The polar vortex is expected to strengthen in the short term and maintain warmer conditions in eastern North America for the foreseeable future, according to Atmospheric and Environmental Research.
Beginning on January 2, 2014, sudden stratospheric warming (SSW) [dubious – discuss] led to the breakdown of the semi-permanent feature across the Arctic known as the polar vortex. Without an active upper-level vortex to keep frigid air bottled up across the Arctic, the cold air mass was forced southward as upper-level warming displaced the ...
“A disrupted polar vortex increases the odds that the tropospheric jet stream will stay shifted farther south, which increases the risk for cold air outbreaks,” according to the Polar Vortex ...
The interface between the cold dry air mass of the pole and the warm moist air mass farther south defines the location of the polar front. The polar front is centered roughly at 60° latitude. A polar vortex strengthens in the winter and weakens in the summer because of its dependence on the temperature difference between the equator and the poles.
Major SSWs occur when the winter polar stratospheric westerlies reverse to easterlies. In minor warmings, the polar temperature gradient reverses but the circulation does not, and in final warmings, the vortex breaks down and remains easterly until the following boreal autumn". [3]
An image circulating on Facebook said a polar vortex is coming in January, but NWS shares that image is not exactly accurate. ... so a prediction for a month from now is certainly prone to change.