FVXX21 KWBC 161500 VOLCANIC ASH ADVISORY STATEMENT ISSUED 1500 UTC 16 FEB 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-199 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY. 12 HOUR FORECAST FROM 16/0000 UTC AVIATION MODEL. . ERUPTION DETAILS: PERIODIC ASH AND STEAM EMISSIONS. . DETAILS OF ASH: GOES-8 IMAGERY THROUGH 1415 UTC SHOWS EXTENSIVE CLOUDINESS OVER THE VOLCANO MAKING ANY DETECTION OF ASH DIFFICULT. AN AIRCRAFT OBSERVATON AT 16/1302 UTC REPORTS VOLCANIC ASH OVER THE SUMMIT AT FL270. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH UP TO FL270 WOULD MOVE TO THE WEST NORTHWEST AT 15 TO 20 KTS. . OUTLOOK: SEE SIGMETS AND VAFTAD . THE NEXT STATEMENT WILL BE ISSUED BY 16/2100 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. . KARST . NNNN