FVXX21 KWBC 200700 VOLCANIC ASH ADVISORY STATEMENT ISSUED 0700 UTC 20 APR 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-464 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. WIND FORECAST FROM THE AVIATION MODEL. REPORT FROM THE GEOPHYSICAL INSTITUTE. . ERUPTION DETAILS: OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: WEATHER OVER THE REGION HAS LIMITED OBSERVATIONS FROM SATELLITE IMAGERY THROUGH 0615 UTC. THE GEOPHYSICAL INSTITUTE INDICATED IN A DAILY REPORT THAT OCCASIONAL EMISSIONS OF ASH AND STEAM CONTINUE. . TRAJECTORY: ANY ASH THAT MAY EXIST FROM THE SUMMIT TO FL200 WOULD MOVE TOWARDS THE WEST SOUTHWEST AT 20 KTS. . THE NEXT STATEMENT WILL BE ISSUED BY 20/1300 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