FVXX21 KWBC 251230 VOLCANIC ASH ADVISORY ISSUED 1230 UTC 25 JUN 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-742 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 AVIATION MODEL. GEOPHYSICAL INSTITUTE. . ERUPTION DETAILS: NEARLY CONTINUOUS GAS AND OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: NO ASH IS VISIBLE IN SATELLITE IMAGERY THROUGH 25/1145 UTC. THE LAST ASH OBSERVED WAS AT 24/2333 UTC BY THE GEOPHYSICAL INSTITUTE WHICH REPORTED ASH OVER THE SUMMIT TO FL280. . 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 25/1830 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. . BROWN . NNNN