201710220330 METAR YSSY 220330Z 12013KT 9999 VCTS VCSH FEW030 BKN100 FEW060CB 19/11 Q1012 NOSIG=
Assuming that
is a TTF (not annotated as such but neither are any of the others), NOSIG means no significant change from what is currently happening=alternate required because of the (VC) TS. AIMHO!!