WCNT05 KKCI 260915 KZWY SIGMET ECHO 18 VALID 260915/261515 KKCI- NEW YORK OCEANIC FIR TC TAMMY OBS AT 0900Z NR N3030 W05824. MOV N 10KT. NC. EMBD TS TOP FL420 WI 200NM OF CENTER. FCST 1515Z TC CENTER N3112 W05936.