FVXX21 KWBC 270130 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0130 UTC 27 NOV 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-172 ECUADOR 1.47S 78.44W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 MULTISPECTRAL AND INFRARED IMAGERY. REPORT FROM THE GEOFISICO INSTITUTO. . ERUPTION DETAILS: CONTINUOUS ASH AND GAS EMISSIONS . DETAILS OF ASH: THE PLUME PREVIOUSLY SEEN IN IMAGERY BECAME OBSCURED BY CLOUDS. AT 26/2215 UTC A BRIEF HOT SPOT WAS NOTED AT THE VOLCANO HOWEVER NO ASH CLOUD WAS DETECTED. THE INSTITUTO REPORTS THAT THE VOLCANO HAS AN ALMOST PERMANENT PLUME OF GASES AND A LITTLE ASH THAT REACHES AROUND 1KM (3,500FT) ABOVE THE SUMMIT OR TO AROUND FL200. . TRAJECTORY: UPPER AIR PATTERNS OVER THE VOLCANO ARE QUITE VARIABLE AND ANY ASH MOVEMENT WILL BE DIFFUSE. . 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 27/0730 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN