FVXX21 KWBC 240425 VOLCANIC ASH ADVISORY STATEMENT ISSUED 0425 UTC 24 MAR 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-351 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY...1800 UTC AVIATION MODEL FORECAST SOUNDING DATA. . ERUPTION DETAILS: OCCASIONAL SMALL EXPLOSIONS REPORTED. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 0345 UTC SHOWED EXTENSIVE CLOUDINESS OVER AND ADJACENT TO THE SUMMIT. ALTHOUGH THERE WAS NO ASH DISCERNIBLE IN SATELLITE IMAGERY THE GEOPHYSICAL INSTITUTE REPORTED VOLCANIC ASH OVER THE VOLCANO AND MOVING WEST AT 0208 UTC. NO HEIGHT WAS GIVEN ON THE ERUPTING COLUMN BUT BASED ON MODEL FORECAST WINDS AND THE OBSERVED WESTWARD MOTION OF THE PLUME THE ASH IS ESTIMATED TO BE AT APPROXIMATELY FL200. . TRAJECTORY: TOWARDS THE WEST AT 10 KNOTS . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT STATEMENT WILL BE ISSUED BY 24/1030 UTC. . REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC ASH ADVISORY STATEMENTS 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. . TURK . NNNN