FVXX21 KWBC 031630 . VOLCANIC ASH ADVISORY ISSUED 1630 UTC 03 NOVEMBER 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-069 ECUADOR 1.47S 78.44W . 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...INSTITUTO GEOFISICO IN ECUADOR...AVIATION MODEL WIND FORECAST DATA FROM THE U.S. NATIONAL WEATHER SERVICE. . ERUPTION DETAILS: THE NOVEMBER 2 BULLETIN OF THE INSTITUTO GEOFISICO DESCRIBES A CONTINUOUS ASH GRAY EMISSION FROM THE VOLCANO AS WELL AS INTERMITTENT EXPLOSIONS. . DETAILS OF ASH: WE CONTINUE TO BE UNABLE TO DETECT ASH IN MULTISPECTRAL OR INFRARED SATELLITE IMAGERY THROUGH 1545 UTC. SCATTERED LOW AND MID LEVEL METEOROLOGICAL CLOUDS CONTINUE TO HAMPER ASH DETECTION. A SUSPICIOUS CLOUD IS VISIBLE IN MULTISPECTRAL IMAGERY THAT MAY CONTAIN ASH. IT IS EAST OF THE VOLCANO WITHIN 33 KM (20 MI) OF THE SUMMIT AND IS CONSISTENT WITH THE CURRENT SIGMET. THE PREVIOUS SIGMET CONTAINED AN AIRCRAFT REPORT OF ASH TO FL230 MOVING EAST AT 11 KTS. . TRAJECTORY: UPPER AIR PATTERNS INDICATE THAT ANY ASH BETWEEN FL200 AND FL280 WOULD MOVE TOWARD THE EAST SOUTHEAST AT LESS THAN 15 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 03/2230 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN