FVXX21 KWBC 091500 VOLCANIC ASH ADVISORY STATEMENT ISSUED 1500 UTC 09 APR 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-421 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE...INFRARED AND MULTISPECTRAL IMAGERY. 6 HOUR FORECAST FROM THE 09/0600 UTC AVIATION MODEL. GEOPHYSICAL INSTITUTE . ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 1415 UTC SHOWED EXTENSIVE CLOUD COVER OVER THE VOLCANO AND THE SURROUNDING VICINITY MAKING THE DETECTION OF ASH BELOW THE CLOUD DECK IMPOSSIBLE. . THE LAST INDICATION OF ASH CAME FROM A 1030 UTC GEOPHYSICAL REPORT OF A PROBABLE VOLCANIC ASH CLOUD OVER THE VOLCANO MOVING TOWARDS THE SOUTH AND SOUTHWEST. A HOT SPOT HAD BEEN NOTED IN NEAR INFRARED SATELLITE IMAGES BETWEEN 0900 UTC AND 1000 UTC. . TRAJECTORY: ANY ASH THAT MAY EXIST BETWEEN FL200 AND FL320 WOULD MOVE TOWARDS THE SOUTH AND SOUTHWEST AT 15 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT STATEMENT WILL BE ISSUED BY 09/2100 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. . TURK . NNNN