FVXX21 KWBC 121900 VOLCANIC ASH ADVISORY STATEMENT ISSUED 1900 UTC 12 MAY 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-559 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. GEOPHYSICAL INSTITUTE REPORT . ERUPTION DETAILS: OCCASIONAL STEAM AND ASH EMISSIONS. . DETAILS OF ASH: NO ASH COULD BE DISCERNED IN SATELLITE IMAGERY THROUGH 1845 UTC ALTHOUGH EXTENSIVE CLOUDS ARE PRESENT. GEOPHYSICAL INSTITUTE REPORTS ASH EMISSIONS TO ABOUT FL200. . TRAJECTORY: ANY ASH THAT MAY EXIST FROM THE SUMMIT TO FL200 WOULD MOVE TOWARDS THE WEST AT 15 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 13/0100 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. . NNNN