WSBC31 FBSK 190030 FBGR SIGMET A01 VALID 190030/190430 FBSK- FBGR GABORONE FIR FRQ TS OBS WI S2325 E02015 -S2331 E02119- S2509 E02230 -S2553 E02228- S2521 E02131 -S2325 E02015 TOP FL360 MOV SE WKN=