Meteorologists with the National Weather Service are predicting that the northern polar vortex is likely to split once again later this month, into not just two, but three separate vortices that are expected to bring unseasonably cold and stormy weather to parts of Europe and North America.

The polar vortex is a low-pressure area of air that resides over both of Earth’s poles, with the vortex at each pole spinning in a counter-clockwise direction, and bordered around their edges by the jet stream. Occasionally, the Northern Hemisphere’s vortex splits into a number of separate gyres that drift south, bringing colder Arctic air along with them.
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The Central American country of Nicaragua and war-torn Syria have joined the rest of the world’s nations in agreeing to sign onto the Paris climate accord, as the world’s nations meet in Bohn, Germany, for the world’s largest climate summit. These two new inclusions to the accord leave the United States as the sole hold-out on the agreement, after President Donald J. Trump announced that the U.S. would withdraw from the accord last June.

President Daniel Ortega announced that Nicaragua would join the deal on September 20: "We have to be in solidarity with this large number of countries that are the first victims, who are already the victims and are the ones who will continue to suffer the impact of these disasters."
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