FVXX21 KWBC 101845 VOLCANIC ASH ADVISORY STATEMENT ISSUED 1845 UTC 10 MAY 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-551 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 10/0600 UTC AVN MODEL. GEOPHYSICAL INSTITUTE. . ERUPTION DETAILS: OCCASIONAL STEAM AND ASH EMISSIONS. . DETAILS OF ASH: VISIBLE SATELLITE IMAGERY THROUGH 1815 UTC SHOWS BROKEN CLOUDS COVERING THE VOLCANO AND SURROUNDING AREA MAKING ASH DETECTION DIFFICULT. HOWEVER THE GEOPHYSICAL INSTITUTE REPORTED VOLCANIC ASH OVER THE VOLCANO MOVING WEST AT 1800 UTC. THE ASH IS ESTIMATED AT FL250. . IN ADDITION THE INSTITUTE REPORTED THAT THE VOLCANO REMAINS VERY ACTIVE WITH PERIODIC MODERATE EXPLOSIONS OCCURRING AND ASSOCIATED ASH POSSIBLE UP TO FL250. . TRAJECTORY: ANY ASH THAT MAY EXIST FROM THE SUMMIT TO FL250 WOULD MOVE TOWARDS THE WEST AT 20 TO 25 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT STATEMENT WILL BE ISSUED BY 11/0100 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