Why are jet streams called travelling depression?

Jet streams are waving both horizontally and vertically . Which means that neither they are parallel to earth surface , nor are they perpendicular. Actually , they are a mix of both. Secondly, what Now lets come to the core problem . read more

Jet streams are waving both horizontally and vertically . Which means that neither they are parallel to earth surface , nor are they perpendicular. Actually , they are a mix of both. read more

While the polar and subtropical jet streams are the best known and most studied, other jet streams can form when wind speeds are above 58 mph (93.3 kph) in the upper atmosphere at about 6 miles (9.6 kilometers) to 9 miles (14.5 kilometers) above the surface. read more