FVXX20 KNES 311521 VA ADVISORY DTG: 20171231/1521Z VAAC: WASHINGTON VOLCANO: POPOCATEPETL 341090 PSN: N1901 W09837 AREA: MEXICO SUMMIT ELEV: 17802 FT (5426 M) ADVISORY NR: 2017/338 INFO SOURCE: GOES-EAST. MEXICO CITY MWO. VOLCANO WEB CAMERA. ERUPTION DETAILS: PREVIOUS VA EMS OBS VA DTG: 31/1500Z OBS VA CLD: VA NOT IDENTIFIABLE FROM SATELLITE DATA. FCST VA CLD +6HR: NO VA EXP FCST VA CLD +12HR: NO VA EXP FCST VA CLD +18HR: NO VA EXP RMK: NO VA IS OBSERVED IN GOES-16 ENHANCED IMAGERY. WEBCAM SHOWS EMS OF GASES CONTINUING. ...SCHWARTZ NXT ADVISORY: NO FURTHER ADVISORIES