WSNZ21 NZKL 091738 NZZC SIGMET 49 VALID 091739/092139 NZKL- NZZC NEW ZEALAND FIR SEV ICE FCST WI S3730 E17850 - S3830 W17940 - S3940 E17800 - S3850 E17700 - S3730 E17850 6000FT/FL170 STNR NC=