WSPF21 NTAA 040755 NTTT SIGMET A2 VALID 040800/041200 NTAA- NTTT TAHITI FIR/UIR EMBD TS FCST WI S1045 W15215 - S0845 W15300 - S0600 W14915 - S0930 W14715 - S1045 W15215 TOP FL500 STNR NC=