Archive | October 15, 2017

Khanun weakens, Lan forms

Good morning from the Western Pacific Weather team.

Khanun has weakened into a Severe Tropical Storm, but it is still bringing some strong winds and significant rainfall into southern areas of China and into the Indochina Peninsula. Those in Vietnam will have to continue monitoring the system as it continues to weaken and turn toward the south. The momentum of the system is likely to slow, meaning persistent rainfall could lead to flooding and landslides for the peninsula. If the system loses its momentum moving to the west, it is possible that the bulk of the rain could stay off-shore, but this is just one possible scenario. It is more likely that the drenching rains will cause serious issues for Vietnam over the next few days.

Meanwhile, Tropical Storm Lan has formed east of the Philippines. It is expected to intensify over the next few days and become a typhoon. Given its location, along with the steering winds, there is an expectation that the system will drift eastward away from the country, but we will have to monitor the system over the next few days.

An interesting area of development is occurring west of the Philippines over Palawan. Warm waters are leading to a decent cluster of clouds developing in a region where we typically do not see tropical activity. Models are indicating that this could potentially develop into a low pressure area, but should it close its core system, it may create some interesting interaction with Lan later this week. It’s another interesting development that we will have to continue watching.

Jonathan Oh
Meteorologist, Western Pacific Weather

Khanun now large, strong typhoon

Good evening from the Western Pacific Weather team.

Khanun has now intensified into a strong typhoon, and it has developed into a large size, forcing its impact from Hong Kong into Hainan. The Hong Kong International Airport has reported winds of 48 kilometers per hour during the 08 UTC hour.

Khanun will continue to weave its way westward toward the Qiongzhou Strait over the next 24 hours. Conditions on Hainan and northward will continue to deteriorate with strong winds of up to 190 kilometers per hour toward the center of the storm. Heavy downpours will lead to flash flooding and inundation in parts of the cities nearby. Those located in northern Vietnam will also begin to see poorer conditions over the next 24 hours as the system approaches the country.

Khanun, because of its scale along with the increasing coverage over land, will weaken, but that will cause the storm to slow its momentum, increasing heavy rainfall over northern and central Vietnam through Monday, Tuesday, and possibly even into Wednesday, making the situation there worse than before as flooding will lead to mudslides and additional property destruction and danger to life as well.

Jonathan Oh
Meteorologist, Western Pacific Weather