FVXX21 KWBC 301330 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1330 UTC 30 NOV 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-187 ECUADOR 1.47S 78.44W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 MULTISPECTRAL AND INFRARED SATELLITE IMAGERY...REPORT FROM THE GEOFISICO INSTITUTO...AVIATION MODEL WIND FORECAST . ERUPTION DETAILS: CONTINUOUS STEAM AND ASH EMISSIONS AND OCCASIONAL EXPLOSIONS OF ASH. . DETAILS OF ASH: NO ASH CAN BE SEEN IN SATELLITE IMAGERY THROUGH 1245 UTC ALTHOUGH THERE IS EXTENSIVE METEOROLOGICAL CLOUDS IN THE AREA. YESTERDAY UNDER CLEARER SKIES WESTWARD MOVING ASH AT ABOUT FL300 WAS OBSERVED. YESTERDAY AFTERNOONS REPORT FROM THE GEOFISICO INSTITUTO INDICATES THAT THE VOLCANO CONTINUES TO EMIT GASES AND ASH BELOW FL250. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH BETWEEN FL200 AND FL250 WOULD MOVE BETWEEN WEST AND NORTHWEST 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 30/1930 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN