FVXX21 KWBC 212300 VOLCANIC ASH ADVISORY STATEMENT ISSUED 2300 UTC 21 FEB 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-222 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: THE GEOPHYSICAL INSTITUTE IN QUITO. GOES-8 VISIBLE AND INFRARED AND MULTISPECTRAL IMAGERY. GUAYAQUIL MWO REPORT . ERUPTION DETAILS: OCCASIONAL EMISSIONS OF ASH AND STEAM. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 2315 UTC SHOWS EXTENSIVE MIDDLE AND HIGH LEVEL CLOUDS OVER THE VOLCANO MAKING ANY DETECTION OF ASH OR STEAM DIFFICULT. THE GEOPHYSICAL INSTITUTE IN QUITO REPORTS THAT THE VOLCANO REMAINS UNSTABLE AND THAT AN EXPLOSION OF ASH OR STEAM COULD OCCUR AT ANY TIME. THE GUAYAQUIL MWO REPORTS THAT LOCAL SURFACE INDICATES VOLCANIC ASH IN THE AREA. TRAJECTORY: ANY ASH NEAR OR SLIGHTLY ABOVE SUMMIT LEVEL WOULD MOVE TOWARD THE WEST AT 10 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 22/0500 UTC. . 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/) . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . SCHWARTZ . NNNN