FVXX21 KWBC 200055 VOLCANIC ASH ADVISORY STATEMENT ISSUED 0055 UTC 20 APR 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-463 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: SINCE 19/1826 UTC SATELLITE DATA HAS BEEN LIMITED TO ONE IMAGE EVERY THREE HOURS IN ORDER TO SUPPORT US NATIONAL WEATHER SERVICE OPERATIONS. NORMAL IMAGING WILL RESUME AT 20/0026 UTC. . NO ASH COULD BE DISCERNED IN THE MOST RECENT SATELLITE IMAGE AT 19/2345 UTC. . TRAJECTORY: ANY ASH THAT MAY EXIST FROM THE SUMMIT TO FL200 WOULD MOVE TOWARDS THE WEST AT 15 TO 20 KTS. . THE NEXT STATEMENT WILL BE ISSUED BY 20/0700 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. . BROWN . NNNN