FVXX20 KWBC 280158 VOLCANIC ASH ADVISORY ISSUED: 2004JUL28/0158Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W7826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2004/422 INFORMATION SOURCE: GUAYAQUIL MWO. GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. GEOPHYSICAL INSTITUTE. ERUPTION DETAILS: ASH EMISSIONS STARTING AROUND 26/1837Z OBS ASH DATE/TIME: 28/0115Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/FL200 MOVING TO W 15-25 KNOTS. FCST ASH CLOUD +6H: NOT AVBL FCST ASH CLOUD +12H: NOT AVBL FCST ASH CLOUD +18H: NOT AVBL REMARKS: IT IS DIFFICULT TO DETECT ASH IN SATELLITE IMAGERY DUE TO EXTENSIVE CLOUDS OVER THE VOLCANO. ...KARST NEXT ADVISORY: WILL BE ISSUED BY 2004JUL28/0800Z NNNN