FVXX21 KNES 302343 VA ADVISORY DTG: 20191230/2343Z VAAC: WASHINGTON VOLCANO: SANGAY 352090 PSN: S0200 W07820 AREA: ECUADOR SUMMIT ELEV: 17159 FT (5230 M) ADVISORY NR: 2019/354 INFO SOURCE: GOES-EAST. NWP MODELS. VOLCAT. ERUPTION DETAILS: POSS ONGOING VA EM OBS VA DTG: 30/2310Z OBS VA CLD: SFC/FL210 S0155 W07852 - S0200 W07820 - S0202 W07818 - S0207 W07851 - S0155 W07852 MOV W 5-10KT FCST VA CLD +6HR: 31/0500Z SFC/FL210 S0153 W07858 - S0200 W07819 - S0201 W07819 - S0205 W07858 - S0153 W07858 FCST VA CLD +12HR: 31/1100Z SFC/FL210 S0152 W07902 - S0201 W07820 - S0202 W07818 - S0205 W07903 - S0152 W07902 FCST VA CLD +18HR: 31/1700Z SFC/FL210 S0152 W07905 - S0201 W07819 - S0202 W07819 - S0207 W07905 - S0152 W07905 RMK: POSS VA CLD VISIBLE IN STLT IMAGERY INBTWN WX CLD MOV W FM SUMMIT FL210. NWP MODESL SUGGEST CONT WESTWARD FLOW THRU T+18 HRS. ...BOLL NXT ADVISORY: WILL BE ISSUED BY 20191231/0545Z