Monthly Archives: July 2013


The alert status is changed to YELLOW… There is an elevated risk that Hong Kong will be affected by a tropical cyclone in the next 48 hours… Tropical Depression 09W has further intensified into Tropical Storm JEBI (T1309)… a South … Continue reading


The alert status is GREEN… Hong Kong may be affected by a tropical cyclone in the coming future… Tropical Disturbance 91W is developing over the central part of the South China Sea… Earlier ASCAT and OSCAT passes hinted that there may … Continue reading

91W to develop over the SCS…

Unsettled weather associated with Tropical Disturbance 91W is affecting the South China Sea and also the Philippines… This morning’s OSCAT pass revealed a developing low level circulation centre to the west of Luzon… Convective activities appear to be increasing but … Continue reading

91W moving over central Philippines…

Tropical Disturbance 91W is moving over the Philippines… There is no defined centre observed in scatterometry products and IR imagery… but wide-spread flaring convection is bringing unsettled weather to northern and central Philippines… This low pressure system should move into the … Continue reading

LPA (91W?) around the Philippines…

Tropical Disturbance 91W has drifted northward over the Philippine Sea… The low level circulation centre has yet to strength although convection remains active… Maximum sustained wind speed near the centre is about 15 kts… Due to good poleward outflow and … Continue reading