FVXX20 KWBC 310427 VOLCANIC ASH ADVISORY ISSUED: 2004MAY31/0426Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2004/230 INFORMATION SOURCE: GUAYAQUIL MWO. GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. GEOPHYSICAL INSTITUTE. ERUPTION DETAILS: EMISSION AT 30/1320Z OBS ASH DATE/TIME: 31/0345Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/FL260 MOVING TO W 20-25 KNOTS. FCST ASH CLOUD +6H: NOT AVBL FCST ASH CLOUD +12H: NOT AVBL FCST ASH CLOUD +18H: NOT AVBL REMARKS: THE LAST OBSERVATION OF ASH BY THE INSTITUTE WAS AT 30/1320Z TO FL260. CLOUDS OVER THE VOLCANO MAKE IT DIFFICULT TO DETECT ASH AT THIS TIME. ...KARST NEXT ADVISORY: WILL BE ISSUED BY 2004MAY31/1030Z NNNN