remarks:
151500z position near 21.6n 89.6e.
Tropical cyclone (tc) 06b (sidr) located approximately 120 nm south-
east of Calcutta, India, has tracked northward at 16 knots over the
past 06 hours. Tc 06b continues to track along the western periphery
of the subtropical steering ridge to the east and the increase in
the forward speed of motion has continued over the past 06 hours.
Tc 06b continues to display strong poleward outflow, but has begun
to feel some land influence as it approaches the coast of bangladesh.
The storm has weakened slightly from its peak intensity and now has
a current intensity of 130 knots. The intensity is based on Dvorak
T-numbers of 6.5/7.0 from pgtw at 151130z, and a CIRA multiplatform
satellite intensity estimate of 135 knots at 151200z. The storm will
continue to track northward and will make landfall along the south-
western coast of bangladesh prior to tau 06. The storm will track
more northeastward after landfall and will steadily weaken due to
land interaction and an increase in the vertical wind shear. Tc 06b
will dissipate over land prior to tau 48. The available objective
aids are in good agreement with this forecast scenario. Maximum
significant wave height at 151200z is 40 feet. Next warnings at
162100z, 160300z, 160900z, and 161500z.//

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