FVXX21 KWBC 130300 VOLCANIC ASH ADVISORY STATEMENT ISSUED 0300 UTC 13 APR 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-435 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 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 0215 UTC SHOWS LOW AND MID LEVEL CLOUDS IN THE VICINITY OF THE VOLCANO MAKING IN DIFFICULT TO DETECT ANY ASH. THE VOLCANO REMAINS UNSTABLE. THE GEOPHYSICAL INSTITUTE REPORTS OCCASIONAL ACTIVITY TO FL250. . TRAJECTORY: ASH BETWEEN THE SUMMIT AND FL250 WOULD MOVE TOWARD THE WEST SOUTHWEST AT 15 TO 20 KTS. OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 13/0900 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. . KARST . NNNN