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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

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About Jonathan Oh

Jonathan Oh is a meteorologist on Western Pacific Weather and appearing on NHK World. Jonathan has been working in the field for more than 10 years with a focus on broadcast, radar, and computer model forecasting. He is currently based in Tokyo, Japan.

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