FVXX21 KWBC 260030 VOLCANIC ASH ADVISORY ISSUED 0030 UTC 26 JUN 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-744 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE..INFRARED AND MULTISPECTRAL IMAGERY. 6 HOUR WIND FORECAST FROM THE 24/1800 UTC AVIATION MODEL. GEOPHYSICAL INSTITUTE. . ERUPTION DETAILS: NEARLY CONTINUOUS GAS AND OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 24/2345 UTC SHOWS EXTENSIVE CLOUD COVER OVER AND AROUND THE SUMMIT MAKING DETECTION OF ASH DIFFICULT. ASH WAS LAST OBSERVED BY THE GEOPHYSICAL INSTITUTE AT 25/1228 UTC WITH NO HEIGHT ASSIGNMENT. . TRAJECTORY: ASH FROM THE SUMMIT TO FL280 WILL MOVE TOWARDS THE WEST-SOUTHWEST AT 15-20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 26/0630 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. . WALTER . NNNN