“Some of the colds can even get colder, as when a weakened polar vortex, which normally keeps cold air trapped in the Arctic, allows more frigid polar air to push southward into the U.S. At the same time, the hurricanes that are fueled by warmer ocean temperatures get more violent.
That’s why you’re seeing weird weather extremes in all directions. So, The Washington Post reported that in Montana: “On March 3, the low temperature tanked to a bone-chilling minus-32 in Great Falls. Combined with a high of minus-8, the day finished a whopping 50 degrees below normal.” At the time, the city was in its longest stretch below freezing on record.
Temperatures in Great Falls, Mont., did not rise above freezing for 32 consecutive days between February and March.CreditRion Sanders/Great Falls Tribune
But then The Post reported that on May 11 in a town “near the entrance to the Arctic Ocean in northwest Russia, the temperature surged to 84 degrees Fahrenheit” — in May! Near the Arctic! And this happened at the same time that “the concentration of carbon dioxide in the atmosphere eclipsed 415 parts per million for the first time in human history.” “
David Lindsay: Most Scientists agree that we need to limit our carbon emmissions to no more than 350 parts per million. That is why Bill McKibben calls his organization 350.org.