FVXX20 KWBC 201704 VOLCANIC ASH ADVISORY ISSUED: 2003SEP20/1700Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/264 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. GUAYAQUIL MWO SIGMET. ERUPTION DETAILS: EMISSION AT 19/1004Z OBS ASH DATE/TIME: 20/1615Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/230 MOVING W 10-15 KNOTS. FCST ASH CLOUD+6H: SEE SIGMETS. REMARKS: ASH IS NOT VISIBLE IN SATELLITE IMAGERY THROUGH 20/2015Z. RECENT AIRCRAFT REPORTS INDICATE THAT ASH IS MOVING SW AND IS ESTIMATED TO FL165/230. LATEST SATELLITE IMAGERY AND GFS MODEL WINDS INDICATE THAT ASH SHOULD BE MOVING WEST TO NORTHWEST. WEATHER CLOUDS IN THE VICINITY OF THE VOLCANO IS MAKING IT VERY DIFFICULT TO DETECT ASH HEIGHTS AND MOVEMENT. WE WILL CONTINUE TO MONITOR THE VOLCANO CLOSELY AND ADVISE AS NEEDED....KIBLER NEXT ADVISORY: WILL BE ISSUED BY 2003SEP20/2300Z. NNNN