FVXX21 KWBC 111300 VOLCANIC ASH ADVISORY STATEMENT ISSUED 1300 UTC 11 MAY 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-554 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY...WINDS FORECAST FROM THE 0600 UTC AVN MODEL...PILOT REPORT . ERUPTION DETAILS: OCCASIONAL STEAM AND ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 1215 UTC SHOWS DENSE CLOUD COVER OVER THE VOLCANO AND THE SURROUNDING VICINITY HINDERING ASH DETECTION. THERE IS HOWEVER A SUSPECT AREA OF POSSIBLE ASH WEST OF THE SUMMIT. THIS POSSIBLE ASH EXTENDS FROM THE SUMMIT ABOUT 40 KM (21 NMI) TO THE WEST..IS 5 KM (3 NMI) WIDE..AND IS ESTIMATED AT A HEIGHT AT OR BELOW FL260. A PILOT REPORT AT 1240 UTC CONFIRMED THE PRESENCE OF THE ASH PLUME. . TRAJECTORY: ANY ASH THAT MAY EXIST FROM THE SUMMIT TO FL260 WOULD MOVE TOWARDS THE WEST AT 20 TO 25 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT STATEMENT WILL BE ISSUED BY 11/1900 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. . CLARK . NNNN