Archive | October 22, 2017

Typhoon Lan makes landfall early Monday morning

Greetings from the Western Pacific Weather team.

It’s a very late night/early morning for us here in Tokyo as we continue to monitor Lan. The Japan Meteorological Agency stated that the storm made landfall in Shizuoka Prefecture at around 3 a.m. local time. The typhoon maintained its status as a strong typhoon, thrashing Japan with significant rainfall and powerful winds.

Some reports indicated rainfall totals as high as 888 millimeters in more than 48 hours in Wakayama Prefecture, and winds were kicking up to 168 kilometers per hour in central Japan.

The storm will continue to move north and east, picking up momentum while bringing stormy conditions to eastern and northern Japan during the morning hours Monday. While the skies may clear, the winds will continue to be a factor during a good portion of the daylight hours.

All of this should wrap up by Monday evening. Meanwhile, there is a tropical depression further south of Guam, but for the next 24 hours, it should not develop into a tropical storm. We will have to watch and see if it will develop into something more serious.

Jonathan Oh
Meteorologist, Western Pacific Weather

20171023 Monday 0235 Radar

Typhoon Lan bringing significant rain into Japan, heavy rain warnings issued

Good evening from the Western Pacific Weather team.

As Sunday evening rolls in, Typhoon Lan is making its presence known those living across western, central, and eastern Japan. Some locations are seeing sustained winds reported up to 60 kilometers per hour in western and central locations of the country. The system is weakening as it approaches Japan. The visible satellite imagery tells a lot about the inefficiency of the circulation as a clearly defined eye has been lost.

However, portions of the Tohoku region in northeastern Japan have now been included in various weather warnings, including heavy rain that may be ground-loosening. Others are also located within storm warnings as well.


Plenty of raining has been falling all throughout Japan, including Tokyo. The capital has seen 108 millimeters of precipitation since midnight, and the rainfall will only become progressively worse overnight.

File Oct 22, 17 11 28

The storm is slated to make landfall sometime after 3 a.m. Monday morning Japan time. By that point, the storm is expected to be weaker as a strong typhoon, but nevertheless, it will provide significant rainfall that can lead to flooding along with strong winds that could hit 50 knots or more as the system comes on shore. Public transportation and travel in general will be a serious issue for those located in the Greater Tokyo area Monday morning. Even those in the Tokai and Kinki regions will have some issues for the morning hours.

The storm will quickly move out of the country by Monday afternoon, bringing much improved conditions and possibly even clear skies progressing west to east during the later hours on Monday. However, northeastern areas of Japan will likely deal with strong winds, high waves, and rainfall through Monday evening and possibly into early Tuesday.

At this point, expect conditions to continue deteriorating into the overnight hours. Expect conditions to improve during the day Monday. Please be safe wherever you are.

Jonathan Oh
Meteorologist, Western Pacific Weather

20171022 Sunday 07 UTC Track