FVXX21 KWBC 122100 VOLCANIC ASH ADVISORY STATEMENT ISSUED 2100 UTC 12 APR 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-434 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY... AVIATION MODEL WINDS ALOFT FORECAST . ERUPTION DETAILS: NEARLY CONTINUOUS GAS EMISSIONS WITH OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 2015 UTC SHOWS CLOUDY CONDITIONS IN THE VICINITY OF THE VOLCANO. THE CLOUD COVER MAKES DETECTION OF ANY ASH DIFFICULT. THE VOLCANO REMAINS UNSTABLE. THERE HAVE BEEN NO REPORTS OF ASH ACTIVITY ABOVE FL250. . TRAJECTORY: ASH BETWEEN THE SUMMIT AND FL250 WOULD MOVE TOWARD THE WEST SOUTHWEST AROUND 15 KNOTS. OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 13/0300 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. . NNNN