Page 26 - Jet Stream Pattern News Today : Breaking News, Live Updates & Top Stories | Vimarsana

Affecting anyone. now, kit send cold air in different directions. think of a traffic cop. it does not affect the surface, though. just to give you an example, this shows you the colors of where all the cold is right now, typical, siberia through the north pole, canada and down here to the u.s., it is not under even the polar vortex. what happens -- this is the surface. >> in other words, this is just bad reporting that we are saying polar vortex all the time. >> it is horrible because so many people now believe it. >> if it is not a polar vortex, what is it? >> it's an extreme jet stream patte...

Coast-to-coast, impacting tens of millions of people. what's the science behind all of the extreme weather? >> in terms of the storms we've seen in october, november, december, as i often tell peo e people, you know, the atmosphere doesn't have an on-off switch that knows when winter begins. >> dr. marshall shepherd is a president of the meteorological society. he said there's one big reason for the wild weather, the jet team. >> when we have the el nino-neutral conditions, the jet stream patterns, we get the strong dips in the jet stream patterns, and in the dips, cold air, and in the hills, ...

The most. >> got plenty of salt. the back roads are starting to stick a little bit. it looks like it's coming down pretty good right now. >> i'm going to stay in. >> because? >> stay out of the way. >> reporter: the winter storms have impacted tens of millions of people. what's the science behind all the extreme weather? >> in terms of the storms that we've seen in october, november, and december as i often tell people, you know, the atmosphere doesn't have an on/off switch that knows when winter actually begins. >> reporter: dr. marshall shepherd is the president of the meteorological society...

>> reporter: he's the president of the meet logical society. he says there's one reason for the wild weather, the jet stream. >> the jet stream patterns, we get strong dips in the jet stream patterns. in the dips, there could be cold air. in the hills, warm air. so, generally, the jet stream pattern is the governing forcing function of our weather in the wintertime. >> reporter: case and point, denver, colorado. in ten days they went from negative temperatures to a balmy 70 degrees. a time of year when it should be hovering around 40. we are talking about 30 degrees above normal. in the big "d...

Ocean. and what this is doing, it's having an effect. it's melting ice. this is leading to higher sea levels, as well as the atmosphere is now holding more moisture. and that is leading, of course, to more rainfall, and then changes in the jet stream pattern. now, as we move over to our next graphic we want to talk about how this is affecting the day-to-day weather. and what we're seeing the most evidence for. well, let's talk about heat waves. this time last year, we saw temperatures running about 30 degrees above average. right now we're cold. i think we have some video of heat waves to kind...