FVXX20 KWBC 280231 VOLCANIC ASH ADVISORY ISSUED: 2003OCT28/0130Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/422 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. ERUPTION DETAILS: CONTINUED ASH AND STEAM EXHALATIONS. OBS ASH DATE/TIME: 28/0045Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA WINDS FL100/240 MOVING W 10-15 KNOTS. FCST ASH CLOUD+6H: SEE SIGMETS REMARKS: ASH COULD NOT BE DETECTED IN SATELLITE IMAGERY DUE TO EXTENSIVE CLOUD COVER. NEXT ADVISORY: WILL BE ISSUED BY 2003OCT28/0730Z. NNNN