Related Images
(Click to enlarge)
Credit: NOAA/NRL
The latest tropical depression in the northwestern Pacific Ocean formed east of the Big Island of Japan on Sunday, September 11. However, Tropical Depression 17W did not have a long life, as the last warning on the system was issued 12 hours later. The storm lost its tropical characteristics by September 12. At 5 a.m. (0900 UTC) on Sunday, September 11, Tropical Depression 17W formed about 590 nautical miles east-southeast of Misawa, Japan. Infrared data from Japan’s Himawari satellite revealed that the depression appears somewhat elongated.
By 5 p.m. EDT (2100 UTC) the Joint Typhoon Warning Center (JTWC) issued its final bulletin on the depression. At that time, it was located about 896 nautical miles north-northeast of the Japanese island of Minami Torii Shima, near 28.7 degrees north latitude and 162.2 degrees east longitude. At the time, 17W was moving east-northeast at a speed of 24 knots.
Animated enhanced infrared satellite imagery indicated rapidly decreasing deep convection due to increased westerly vertical wind shear associated with mid-latitude westerlies.
On Monday, September 12 at 1:30 p.m. EDT (1730 UTC) 17W became an extratropical system and NOAA’s GOES-West satellite captured an infrared image of the storm. The 17W looks like a frontal system in the imagery.
