FVXX21 KWBC 110900 VOLCANIC ASH ADVISORY STATEMENT ISSUED 0900 UTC 11 APR 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-428 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... NATIONAL WEATHER SERVICE NUMERICAL MODELS. . ERUPTION DETAILS: ASH AND STEAM EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 0815 UTC SHOWS LOW AND MID LEVEL CLOUDS AROUND THE REGION MAKING ANY DETECTION OF ASH AND STEAM DIFFICULT. THE GEOPHYSICAL INSTITUTE REPORTED VOLCANIC ASH OVER THE VOLCANO AT 11/0150 UTC TO FL230. . TRAJECTORY: ANY ASH AND STEAM FROM THE SUMMIT TO FL230 SHOULD MOVE TO THE NORTHWEST AT 15 TO 20 KNOTS. OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 11/1500 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. . KARST . NNNN