FVXX21 KWBC 161500 VOLCANIC ASH ADVISORY STATEMENT ISSUED 1500 UTC 16 APR 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-449 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY...12 HOUR FORECAST FROM THE 06 UTC AVIATION MODEL. . ERUPTION DETAILS: NEARLY CONTINUOUS GAS EMISSIONS WITH OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: NO ASH CAN BE DETECTED IN SATELLITE IMAGERY THROUGH 16/1415 UTC BECAUSE OF EXTENSIVE WEATHER CLOUDS IN THE AREA. THE LAST REPORT OF ASH WAS BY THE GEOPHYSICAL INSTITUTE AT 15/1853 UTC WHEN ASH WAS OBSERVED TO FL300 OVER THE VOLCANO. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH BETWEEN THE SUMMIT AND FL300 WOULD MOVE TO THE WEST SOUTHWEST AT 10 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 16/2100 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