FVXX20 KWBC 071611 VOLCANIC ASH ADVISORY ISSUED: 2003JUN07/1630Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/053 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. GUAYAQUIL MWO SIGMET ERUPTION DETAILS: ASH EMISSIONS STARTING AT 06/2000Z. MOST RECENT KNOWN EMISSION AT 07/1220Z. OBS ASH DATE/TIME: 07/1545Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/FL240 MOVING W 15-20 KNOTS. FCST ASH CLOUD +6H: SEE SIGMETS REMARKS: EXTENSIVE WEATHER CLOUDS ARE PREVENTING ASH DETECTION IN SATELLITE IMAGERY. A RECENT SIGMET CITES A GEOPHYSICAL INSTITUTE OBSERVATION OF PROBABLE VOLCANIC ASH AT 1220Z. NEXT ADVISORY: WILL BE ISSUED BY 2003JUN07/2230Z. NNNN