FVXX21 KWBC 250825 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0830 UTC 25 NOV 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-164 ECUADOR 1.47S 78.44W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 MULTISPECTRAL IMAGERY. 25/0000 UTC AVIATION MODEL WIND FORECAST. . ERUPTION DETAILS: CONTINUOUS ASH AND GAS EMISSIONS. . DETAILS OF ASH: HIGH AND MID LEVEL METEOROLOGICAL CLOUD COVERED LARGE PORTIONS OF ECUADOR THROUGH 0745 UTC PRECLUDING THE DECTECTION OF ASH IN THE AREA AROUND THE VOLCANO. THE ASH CLOUD PREVIOUSLY TRACKED INTO PERU HAS DISSIPATED. . TRAJECTORY: AROUND THE VOLCANO UPPER WINDS ARE VARIABLE AND ANY ASH WILL MOVE IN MANY DIRECTIONS BETWEEN 5 TO 20 KNOTS. . 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/) . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT STATEMENT WILL BE ISSUED BY 25/1430 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . TURK . NNNN