FVXX21 KWBC 312135 VOLCANIC ASH ADVISORY ISSUED 2135 UTC 31 AUG 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-1021 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE..INFRARED AND MULTISPECTRAL IMAGERY. WIND FORECAST FROM THE AVIATION MODEL. GEOPHYSICAL INSTITUTE REPORT. . ERUPTION DETAILS: GAS AND OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: ASH IS NOT VISIBLE IN THE SATELLITE IMAGERY THROUGH 31/2115 UTC DUE TO HEAVY WEATHER CLOUD COVER. THE VOLCANO IS ALSO OBSCURED FROM SURFACE OBSERVATION. THE GEOPHYSICAL INSTITUTE REPORTS CONTINUED ACTIVITY WITH PROBABLE GAS AND ASH NEAR THE SUMMIT. . TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL260 WILL MOVE TOWARD THE WEST AROUND 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 01/0330 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