FVXX21 KWBC 261630 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1630 UTC 26 NOV 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-170 ECUADOR 1.47S 78.44W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE AND MULTISPECTRAL AND INFRARED IMAGERY. REPORT OF THE GEOFISICO INSTITUTO AND 00Z AVIATION MODEL WIND FORECAST . ERUPTION DETAILS: CONTINUOUS ASH AND GAS EMISSIONS . DETAILS OF ASH: NO ASH CAN BE DETECTED IN SATELLITE IMAGERY THROUGH 26/1545 UTC POSSIBLY DUE TO THE DENSE WEATHER CLOUDS IN THE AREA ESPECIALLY OVER AND EAST OF THE SUMMIT. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH BETWEEN FL200 AND FL250 WILL MOVE TO THE NORTHEAST AT AROUND 10 KNOTS. ANY ASH FROM FL250 TO FL350 WILL MOVE TOWARDS THE WEST AT LESS THAN 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 26/2230 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN