FVXX21 KWBC 291300 VOLCANIC ASH ADVISORY ISSUED 1300 UTC 29 AUG 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-1011 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE AND INFRARED AND MULTISPECTRAL IMAGERY. WINDS FORECAST FROM THE AVIATION MODEL. GEOPHYSICAL INSTITUTE REPORT. . ERUPTION DETAILS: GAS AND OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 29/1215 UTC SHOWS CLEAR SKIES OVER THE VOLCANO. AN AIRCRAFT OBSERVATION AT 29/1215 UTC REPORTS VOLCANIC ASH OVER THE VOLCANO TO FL250 MOVING WEST. . TRAJECTORY: ASH FROM THE SUMMIT TO FL250 WOULD MOVE TOWARDS THE WEST TO WEST SOUTHWEST AT ABOUT 20 TO 25 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 29/1900 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. . . KARST . NNNN