FVXX21 KNES 212300 VA ADVISORY DTG: 20150621/2300Z VAAC: WASHINGTON VOLCANO: POPOCATEPETL 341090 PSN: N1901 W09837 AREA: MEXICO SUMMIT ELEV: 17802 FT (5426 M) ADVISORY NR: 2015/158 INFO SOURCE: GOES-EAST. GFS WINDS. SEISMIC DETECTION. VOLCANO WEB CAMERA. ERUPTION DETAILS: INCREASED SEISMIC WITH SMALL PLUME OF GASES AND LGT ASH OBS VA DTG: 21/2230Z OBS VA CLD: VA NOT IDENTIFIABLE FROM SATELLITE DATA WINDS SFC/FL170 140/05KT FL180/FL200 355/05KT FCST VA CLD +6HR: 22/0430Z FCST VA CLD +12HR: 22/1030Z FCST VA CLD +18HR: 22/1630Z RMK: SEISMIC INCR AT POPO WITH EMISSION OF MOSTLY GASES BUT NOW SOME LGT ASH ALSO SEEN IN WEBCAM. SAT IMAGERY CLOUDY. WINDS LGT AND VAR BUT PLUME EST BELOW FL200 MOV MAINLY SW. ...SWANSON NXT ADVISORY: WILL BE ISSUED BY 20150622/0500Z