FVXX21 KWBC 111730 . VOLCANIC ASH ADVISORY ISSUED 1730 UTC 11 NOV 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-105 ECUADOR 1.47S 78.44W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED VISIBLE AND MULTISPECTRAL IMAGERY...GUAYAQUIL METEOROLOGICAL WATCH OFFICE SIGMETS.... GEOPHYSICAL INSTITUTE IN QUITO and U.S. NUMERICAL MODEL UPPER AIR WIND FORECAST DATA. . ERUPTION DETAILS: CONTINUOUS VENTING OF ASH AND STEAM NOW AT LOWER LEVELS. . DETAILS OF ASH: ASH WAS NOT DETECTED ON SATELLITE IMAGERY THROUGH 11/1645 UTC. . TRAJECTORY: UPPER AIR DATA AND MODEL OUTPUT DATA SUGGEST ANY REMAINING ASH AT FL250 WOULD MOVE TOWARD THE SOUTH-SOUTHEAST AT 5-10 KT. . 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 11/2330. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . WALTER/SAB/NOAA/NESDIS . NNNN