FVXX21 KWBC 292200 VOLCANIC ASH ADVISORY ISSUED 2200 UTC 29 JUL 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-887 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY. SIGMET FROM GUAYAQUIL METEOROLOGICAL WATCH OFFICE. TWELVE HOUR WIND FORECAST FROM THE AVIATION MODEL. . ERUPTION DETAILS: EMISSIONS OF ASH AND STEAM. . DETAILS OF ASH: NO ASH IS CURRENTLY VISIBLE IN SATELLITE IMAGERY THROUGH 29/2045 UTC. A THICK DECK OF CLOUDS SURROUNDS THE VOLCANO MAKING ASH DETECTION DIFFICULT. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ASH BETWEEN THE SUMMIT AND FL250 WILL MOVE TOWARD THE WEST AT 15 TO 25 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 30/0400 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. . NNNN