FVXX20 KNES 311831 VA ADVISORY DTG: 20181231/1831Z VAAC: WASHINGTON VOLCANO: REVENTADOR 352010 PSN: S0004 W07739 AREA: ECUADOR SUMMIT ELEV: 11686 FT (3562 M) ADVISORY NR: 2018/1246 INFO SOURCE: GOES-EAST. VOLCANO WEB CAMERA. NWP MODELS. CIMSS VOLCAT. ERUPTION DETAILS: PSBL ONGOING VA EMS OBS VA DTG: 31/1800Z OBS VA CLD: SFC/FL170 N0010 W07756 - S0004 W07739 - S0005 W07740 - S0001 W07801 - N0010 W07756 MOV NW 10KT FCST VA CLD +6HR: 01/0000Z SFC/FL170 NO ASH EXP FCST VA CLD +12HR: 01/0600Z NO ASH EXP FCST VA CLD +18HR: 01/1200Z NO ASH EXP RMK: VA NOT VISIBLE IN STLT IMAGERY OR WEBCAM DUE TO WX CLD. NWP MODEL GUIDANCE SUGGEST NORTHWESTWARD WINDS. LTLCG TO FCST. ...BOLL NXT ADVISORY: WILL BE ISSUED BY 20190101/0030Z