WVBO31 SLLP 181905 SLLF SIGMET 1 VALID 181905/190105 SLLP- SLLF LA PAZ FIR VA ERUPTION SABANCAYA OBS AND FCST VA CLD E OF LINE WI 1905Z SFC/FL250 S1546 W07151 - S1602 W06845 - S1644 W06840 - S1714 W06910 - S1624 W07126 - S1546 W07151 SFC/FL250=