FVXX20 KWBC 181711 VOLCANIC ASH ADVISORY ISSUED: 2004APR18/1710Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2004/0160 INFORMATION SOURCE: GUAYAQUIL MWO. GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. ERUPTION DETAILS: ASH EMISSION AT 1606Z OBS ASH DATE/TIME: 18/1645Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/FL220 MOVING TO SW 5-10 KNOTS. FCST ASH CLOUD +6H: NOT AVBL FCST ASH CLOUD +12H: NOT AVBL FCST ASH CLOUD +18H: NOT AVBL REMARKS: A GUAYAQUIL MWO SIGMET CITES A 1606Z GEOPHYSICAL INSTITUTE OBSERVATION OF ASH MOVING WSW. NO ASH CAN BE SEEN IN IMAGERY THROUGH 1645Z BUT THE CLOUD COVER IN THE AREA MIGHT BE HINDERING ASH DETECTION. ... NEXT ADVISORY: WILL BE ISSUED BY 2004APR18/2315Z NNNN