FVXX20 KNES 252245 VA ADVISORY DTG: 20171225/2245Z VAAC: WASHINGTON VOLCANO: POPOCATEPETL 341090 PSN: N1901 W09837 AREA: MEXICO SUMMIT ELEV: 17802 FT (5426 M) ADVISORY NR: 2017/311 INFO SOURCE: GOES-EAST. MEXICO CITY MWO. VOLCANO WEB CAMERA. ERUPTION DETAILS: CONTINUOUS EMS OF GASES WITH LOW VA CONTENT TO FL240 OBS VA DTG: 25/2227Z OBS VA CLD: SFC/FL190 N1931 W09907 - N1911 W09846 - N1910 W09849 - N1927 W09907 - N1931 W09907 MOV NW 5-10KT SFC/FL240 N1911 W09847 - N1902 W09837 - N1900 W09837 - N1908 W09850 - N1911 W09847 MOV NW 5-10KT FCST VA CLD +6HR: 26/0430Z SFC/FL240 N1919 W09910 - N1902 W09837 - N1859 W09837 - N1913 W09911 - N1919 W09910 FCST VA CLD +12HR: 26/1030Z SFC/FL240 N1922 W09908 - N1902 W09837 - N1900 W09837 - N1915 W09911 - N1922 W09908 FCST VA CLD +18HR: 26/1630Z SFC/FL240 N1923 W09908 - N1902 W09837 - N1900 W09837 - N1917 W09911 - N1923 W09908 RMK: MEXICO CITY MWO REPORTS EMS WITH LOW VA CONTENT STARTING AT 25/2210Z NOW ARE AT FL240. IMAGERY SHOWS THICKER EMS STARTING NEAR THAT TIME. EMS DISSIPATE ABOUT 35 NMI NW OF THE COLCANO. ...SCHWARTZ NXT ADVISORY: WILL BE ISSUED BY 20171226/0445Z