FVXX21 KWBC 081030 VOLCANIC ASH ADVISORY ISSUED 1030 UTC 08 JUN 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-671 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. 12 HOUR WIND FORECAST FROM THE 08/1200 UTC AVIATION MODEL. GEOPHYSICAL INSTITUTE REPORT. . ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 08/0945 UTC SHOWS HIGH CLOUDS OVER THE AREA IMPEDING THE DETECTION OF ANY ASH. ASH WAS LAST DETECTED ON SATELLITE IMAGERY AT 08/0115 UTC AND WAS ESTIMATED AT FL280. HOWEVER THE GEOPHYSICAL INSTITUTE REPORTED THAT A MODERATE EXPLOSION OCCURRED AT 08/0411 UTC AND PRODUCED ASH NEAR THE SUMMIT AT FL170. THERE HAVE BEEN NO EXPLOSIONS OF THE VOLCANO SINCE THAT TIME. . TRAJECTORY: ANY ASH BETWEEN THE SUMMIT AND FL170 WILL MOVE TOWARDS THE WEST AT 15 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT MESSAGE WILL BE ISSUED BY 08/1630 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. . CLARK . NNNN