FVXX21 KWBC 300400 VOLCANIC ASH ADVISORY ISSUED 0400 UTC 30 JUL 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-888 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. SIGMET FROM GUAYAQUIL METEOROLOGICAL WATCH OFFICE. WIND FORECAST FROM THE AVIATION MODEL. . ERUPTION DETAILS: EMISSIONS OF ASH AND STEAM. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 0315 UTC SHOWED EXTENSIVE CLOUDINESS PRECLUDING THE DETECTION OF ANY ASH. ASH WAS LAST REPORTED BY THE GEOPHYSICAL INSTITUTE AT 29/1530Z TO FL250. . TRAJECTORY: ANY ASH THAT MIGHT EXIST TO FL250 WOULD MOVE TOWARDS THE WEST AT 15 TO 25 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 30/1000 UTC. . REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER 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. . TURK . NNNN