FVXX21 KWBC 212350 VOLCANIC ASH ADVISORY ISSUED 2350 UTC 21 JUL 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-854 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. GEOPHYSICAL INSTITUTE. GUAYAQUIL MWO. . ERUPTION DETAILS: EXPLOSION WITH HEAVY ASH EMISSION AROUND 21/2220 UTC. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 21/2315 UTC CONFIRMS REPORTS OF AN ASH CLOUD THIS EVENING AT TUNGURAHUA. THE LATEST IMAGES SUGGEST THAT THERE IS AN AREA OF AT LEAST MODERATELY DENSE ASH MOVING TO THE WEST AND NORTHWEST OF THE SUMMIT. IT IS VERY DIFFICULT THOUGH TO ASCERTAIN THE AREAL COVERAGE DUE TO OTHER CLOUDS IN THE REGION. THE GEOPHYSICAL INSTITUTE REPORTED THAT THE EMISSION STARTED AT 21/2220 UTC. THEY HAVE JUST REPORTED HOWEVER WITHIN THE LAST 5 MINUTES THAT THERE IS STILL ASH EMMANATING FROM THE SUMMIT. IT IS ESTIMATED TO BE REACHING AS HIGH AS FL350. . TRAJECTORY: ASH FROM THE SUMMIT TO FL250 SHOULD MOVE TO THE NORTHWEST AT 10 TO 20 KNOTS WHILE ASH FROM FL250 TO FL350 SHOULD MOVE WEST AT 20 TO 30 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT STATEMENT WILL BE ISSUED BY 22/0600 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. . ORRISON . NNNN