FVXX21 KWBC 160850 VOLCANIC ASH ADVISORY STATEMENT ISSUED 0850 UTC 16 APR 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-448 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY...REPORTS FROM THE GEOPHYSICAL INSTITUTE...NATIONAL WEATHER SERVICE FORECAST MODELS. . ERUPTION DETAILS: NEARLY CONTINUOUS GAS EMISSIONS WITH OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 16/0815 UTC DOES NOT SHOW ANY DEFINITE AREAS OF ASH. STRONG SHOWER AND THUNDERSTORM ACTIVITY EAST OF THE SUMMIT HAS CAST A RATHER EXTENSIVE DECK OF CLOUDS OVER THE WHOLE REGION. THE LAST REPORT OF ASH WAS BY THE GEOPHYSICAL INSTITUTE AT 15/1853 UTC WHEN ASH WAS OBSERVED TO FL300 OVER THE VOLCANO. . TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL300 IS EXPECTED TO MOVE TO THE WEST AND SOUTHWEST AT 15 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 16/1500 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. . ORRISON . NNNN