FVXX20 KWBC 211626 VOLCANIC ASH ADVISORY ISSUED: 2004JUL21/1626Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W7826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2004/398 INFORMATION SOURCE: GUAYAQUIL MWO. GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. GEOPHYSICAL INSTITUTE. ERUPTION DETAILS: ASH LAST OBSERVED AT 21/1259Z OBS ASH DATE/TIME: 21/1545Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL240 MOVING TO W 10-15 KNOTS. FCST ASH CLOUD +6H: NOT AVBL FCST ASH CLOUD +12H: NOT AVBL FCST ASH CLOUD +18H: NOT AVBL REMARKS: CLOUDY CONDITIONS CONTINUE AT THE SUMMIT MAKING ASH DETECTION DIFFICULT TO DISCERN. ASH ERUPTIONS WILL DRIFT WESTWARD ...GALLINA NEXT ADVISORY: WILL BE ISSUED BY 2004JUL21/2230Z NNNN