FVXX21 KWBC 180230 VOLCANIC ASH ADVISORY STATEMENT ISSUED 0230 UTC 18 APR 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-455 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY...NATIONAL WEATHER SERVICE MODEL WINDS FORECAST . ERUPTION DETAILS: OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: NO ASH COULD BE SEEN IN SATELLITE IMAGERY THROUGH 0145 UTC. HOWEVER SATELLITE DATA HAS BEEN LIMITED TO ONE IMAGE EVERY 3 HOURS IN ORDER TO SUPPORT NATIONAL WEATHER SERVICE OPERATIONS. . TRAJECTORY: ANY ASH THAT MAY EXIST FROM THE SUMMIT TO FL220 WOULD MOVE WEST AT 10 TO 15 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 18/0830 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. . CLARK . NNNN