FVXX21 KWBC 150530 VOLCANIC ASH ADVISORY ISSUED 0530 UTC 15 SEP 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-1079 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: INFRARED AND MULTISPECTRAL SATELLITE IMAGERY. WINDS FORECAST FROM THE AVIATION MODEL. GEOPHYSICAL INSTITUTE REPORT. . ERUPTION DETAILS: OCCASIONAL STEAM AND ASH EMISSIONS. . DETAILS OF ASH: NO ASH WAS DETECTED IN SATELLITE IMAGERY THROUGH 15/0345 UTC. MULTI-LAYER CLOUDS ARE OBSCURING THE SUMMIT. . TRAJECTORY: ANY ASH FROM THE SUMMIT UP TO FL240 WOULD MOVE WESTWARD AT AROUND 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 15/1130 UTC. . REAL TIME SATELLITE IMAGERY AND VOLCANIC ASH ADVISORIES OFTEN ACCOMPANIED BY A MAP DEPICTING ASH LOCATION ARE AVAILABLE AT INTERNET URL ADDRESS HTTP://WWW.SSD.NOAA.GOV/VAAC/WASHINGTON.HTML (ALL LOWER CASE EXCEPT /VAAC/) . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . . NNNN