FVXX21 KWBC 111900 VOLCANIC ASH ADVISORY STATEMENT ISSUED 1900 UTC 11 MAY 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-555 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 1200 UTC AVN MODEL. . ERUPTION DETAILS: OCCASIONAL STEAM AND ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 1815 UTC SHOWS DENSE CLOUD COVER OVER THE VOLCANO AND THE SURROUNDING VICINITY HINDERING ASH DETECTION. HOWEVER A POSSIBLE ASH AND STEAM PLUME IS PRESENT TO THE WEST OF THE SUMMIT. THE AREA EXTENDS ABOUT 25 KM (13 NMI) WEST FROM THE SUMMIT AND IS 6 KM (4 NMI) WIDE. BECAUSE OF THE CLOUDS IN THE AREA THE ACTUAL EDGE OF THE ASH IS DIFFICULT TO DISCERN. THE PLUME IS ESTIMATED AT OR BELOW FL260. . 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 12/0100 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