cieldumort
(Moderator)
Tue Oct 04 2016 06:46 AM
Re: Matthew Forecast Lounge

For discussion accuracy, Mattew is not annular. The very micrwoave pass included above from 0926z this morning shows the spiral bands W-NW-N and E-SE-S-SW-W.

SHIPS is also not analyzing as annular

## ANNULAR HURRICANE INDEX (AHI) AL142016 MATTHEW 10/04/16 06 UTC ##
## STORM NOT ANNULAR, SCREENING STEP FAILED, NPASS=4 NFAIL=3 ##
## AHI= 0 (AHI OF 100 IS BEST FIT TO ANN. STRUC., 1 IS MARGINAL, 0 IS NOT ANNULAR) ##


It is however worth noting that in many respects, Matthew has been behaving a lot like an annular hurricane for much of its existence as a major.



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