FVXX20 KWBC 201830 VOLCANIC ASH ADVISORY ISSUED: 2002JUL20/1830Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2002/336 . INFORMATION SOURCE: GOES-8 IMAGERY. AVN MODEL WINDS FORECAST. GUAYAQUIL MWO SIGMET. GEOPHYSICAL INSTITUTE. . ERUPTION DETAILS: ASH OBSERVED AT 20/1737Z. . OBS ASH DATE/TIME: 20/1737Z . OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/FL165 MOV W 10-15 KTS FL165/FL265 MOVING NE 10- 15 KNOTS. . FCST ASH CLOUD+6H: SEE SIGMETS. . REMARKS: THE GEOPHYSICAL INSTITUTE REPORTS ASH WAS OBSERVED FROM FL165/FL265 MOV NE AT 1737Z. NO ASH CAN BE SEEN IN SATELLITE IMAGERY THROUGH 1745Z DUE TO WEATHER CLOUDS ACROSS THE REGION...KIBLER/TURK . NEXT ADVISORY: WILL BE ISSUED BY 2002JUL21/0030Z. . NNNN