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Tropical Storm Ewiniar (19W) Becoming Extra-Tropical

45.0N 147.8E

September 30th, 2012 Category: Tropical Storms

Tropical Storm Ewiniar (19W) – September 29th, 2012

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Track of Tropical Storm Ewiniar (19W) - September 29th, 2012 © Univ. of Wisconsin

Track of TS 19W

Tropical Storm Ewiniar (19W) located approximately 475 nm east-northeast of Yokosuka, Japan, has tracked northeastward at 23 knots over the past six hours.

Animated enhanced infrared satellite imagery shows the low level circulation center (LLCC) has separated completely from the convection. Increasing vertical wind shear and unfavorable sea surface temperatures have led to a breakdown of the LLCC structure.
Continued acceleration to the northeast will further erode the system causing it to become extra-tropical (ET) within the next 12 hours. Maximum significant wave height is 15 feet.

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