WVSA31 TFFF 141337 SOOO SIGMET 6 VALID 141345/141930 TFFF- SOOO CAYENNE FIR/UIR VA ERUPTION MT SOUFRIERE ST. VINCENT PSN N1320 W06111 VA CLD OBS WI N0615 W04400 - N0715 W05400 - N0915 W05400 - N1000 W04800 - N1130 W04315 - N0615 W04400 SFC/FL350 WKN FCST AT 1930Z WI N0600 W04245 - N0630 W05400 - N0915 W05400 - N1000 W04800 - N1200 W04215 - N0600 W04245=