Tracatrá,
70 kt![](https://foro.tiempo.com/imagenes/imagen-no-existe.png)
UPPER LEVEL ANALYSIS INDICATES THAT A MID-LATITUDE TROUGH PASSING
OVER NORTHEASTERN CHINA AND A TROPICAL UPPER TROPOSHPHERIC TROUGH
(TUTT) CELL OVER LUZON HAVE CAUSED A WEAKENING IN THE NORTHEASTERLY
VERTICAL WIND SHEAR (VWS) OVER THE SOUTH CHINA SEA ALLOWING THE
SYSTEM TO INTENSIFY TO TYPHOON STRENGTH.