CIMSS Blog
Posted by JAC on 9/21/2009, 7:28 am
 MTSAT-1R 10.7 m IR images (above) showed Super Typhoon Choi-Wan (17W) as it reached Category 5 intensity over the western North Pacific Ocean during the 15 September - 16 September 2009 period. The eye of the typhoon was quite large (which moved just to the south of Pagan in the Northern Mariana Islands), with a very cold rings of convection seen during the various eyewall replacement cycles (as also seen on this MIMIC animation). A time series of the Advanced Dvorak Technique (ADT) intensity estimate from the CIMSS Tropical Cyclones site is shown below.   A pair of 1-km resolution MODIS images show the dramatic change in satellite appearance of Choi-Wan, from one with a ragged eye surrounded by cloud tops as cold as -87 C (darker purple color enhancement) on 14 September (above) to more of a classic annular structure with a large and well-defined eye on 15 September (below).  |
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In this thread:
Choi-Wan Stats: ACE = 19.75 - JAC, 9/21/2009, 7:08 am
- Ridin the waves at the Banzai Pipeline - JAC, 9/24/2009, 8:42 am
- Ghost Eye - JAC, 9/21/2009, 7:24 am
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