Monday, August 22, 2016
Massive monsoon gyre generates 3 tropical cyclones near Japan
What meteorologists are calling a massive monsoon gyre has produced three named tropical storms in the Northwest Pacific Ocean on August 19, 2016, and all three of them are simultaneously threatening Japan. The Japan Meteorological Agency (JMA) named them Mindulle, Lionrock, and Kompasu.
According to the American Meteorological Society (AMS), a monsoon gyre is a convection of the summer monsoon circulation of the western North Pacific characterized by 1) a very large nearly circular low-level cyclonic vortex (not the result of the expanding wind field of a preexisting monsoon depression or tropical cyclone) that has an outermost closed isobar with a diameter on the order of 1 200 nautical miles (2 500 km / 1 380 miles); 2) a cloud band bordering the southern through eastern periphery of the vortex/surface low; and 3) a relatively long (two week) life span.
Credit to thewatchers.adorraeli.com