FVXX21 KWBC 171500 VOLCANIC ASH ADVISORY STATEMENT ISSUED 1500 UTC 17 FEB 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-203 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE..INFRARED AND MULTISPECTRAL IMAGERY. GUAYAQUIL METEOROLOGICAL WATCH OFFICE. 6 HOUR FORECAST FROM THE 17/0600 UTC AVIATION MODEL. . ERUPTION DETAILS: PERIODIC ASH AND STEAM EMISSIONS. . DETAILS OF ASH: GOES-8 IMAGERY THROUGH 17/1415 UTC SHOWS EXTENSIVE HIGH CLOUDINESS OVER THE AREA MAKING DETECTION OF ASH DIFFICULT. THE GEOPHYSICAL INSTITUTE DID HOWEVER REPORT ASH OVER THE VOLCANO AT 17/1035 UTC. . TRAJECTORY: ASH AT FL270 WOULD MOVE TOWARD THE WEST-NORTHWEST AT 20KTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT STATEMENT WILL BE ISSUED BY 17/2100 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. . WALTER . NNNN