IR 2011-12-13 1230Z (from NRL)
Tropical Depression 27W has formed southeast of Yap… It’s moving to the west at around 6N 143E… Maximum sustained wind speed around the centre is estimated to be 45 km/h (25 kt)… A region of deep convection has developed over the past 6 hours… covering the depression’s low level circulation centre…
CIMSS satellite analysis shows a good outflow channel to the north… Vertical wind shear in that region is below 10 kt… Environmental conditions are favourable for development… TD 27W may become a Tropical Storm as it moves westward rapidly into southern/central Philippines…
At 1251 UTC / 2051 HKT, Yap reported a sea level pressure of 1010.1 hPa…
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