WSPF21 NTAA 081136 NTTT SIGMET A3 VALID 081200/081600 NTAA- NTTT TAHITI FIR/UIR EMBD TS FCST WI S0615 W12930 - S0500 W14015 - S0115 W13900 - S0245 W12915 - S0615 W12930 TOP FL480 MOV W 10KT NC=