WCSA31 TFFF 101257 SOOO SIGMET 4 VALID 101300/101900 TFFF- SOOO CAYENNE FIR/UIR TEST TC PSN N0841 W05139 CB FCST WI 200NM OF TC CENTRE TOP ABV FL450 INTSF FCST AT 1900Z TC CENTRE PSN N1007 W04559=