FVXX20 KWBC 192254 VOLCANIC ASH ADVISORY ISSUED: 2003SEP19/2300Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/261 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. ERUPTION DETAILS: EMISSION AT 19/1004Z OBS ASH DATE/TIME: 19/2245Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/200 MOVING NW 3-7 KNOTS. FL200/260 MOVING E 5-10 KNOTS. FCST ASH CLOUD+6H: SEE SIGMETS. REMARKS: VISIBLE SATELLITE IMAGERY THROUGH 1915Z SHOWED A PLUME OF ASH THAT WAS MOVING TO THE NW. SINCE THEN WEATHER CLOUDS HAVE BUILT UP IN THE REGION MAKING ASH DETECTION DIFFICULT. A 1725Z PILOT REPORT INDICATED ASH WAS MOVING WEST. HOWEVER...WINDS HAVE BECOME MORE VARIABLE AT THE MAXIMUM HEIGHT OF THE ASH NEAR FL260 AS SEEN BY THUNDERSTORM TOPS MOVING EAST. THIS HAS BEEN CONFIRMED BY GFS WINDS...GALLINA NEXT ADVISORY: WILL BE ISSUED BY 2003SEP20/0500Z. NNNN