Large-scale weather and climate patterns, guided in part by the jet stream, play a major role in ... to the southern U.S. and into Europe and Asia. When the polar vortex weakens or even splits ...
One knot equals 1.1 mph. The red flags indicate wind direction. For up-to-date maps of the jet stream (and other weather-related maps) visit the FNMOC Web site.
The cons outweigh the pros for an abnormally strong jet stream heading to the Pacific coast ... The positive news is for air travel from Asia to North America, shaving as much as two hours off ...