FVXX21 KWBC 250400 VOLCANIC ASH ADVISORY STATEMENT ISSUED 0400 UTC 25 MAR 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-355 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY...1800 UTC AVIATION MODEL FORECAST SOUNDING DATA. . ERUPTION DETAILS: OCCASIONAL SMALL EXPLOSIONS REPORTED. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 0315 UTC SHOWED EXTENSIVE CLOUDINESS...THE RESULT OF THUNDERSTORM ACTIVITY...WHICH HAS PRECLUDED THE DETECTION OF ASH. AN ASH PLUME...ESTIMATED NEAR FL200...WAS LAST OBSERVED IN SATELLITE IMAGERY AT 24/1545 UTC. ANY ASH CURRENTLY PRESENT IS STILL BELIEVED TO BE NEAR FL200. . TRAJECTORY: ANY ASH THAT MAY EXIST TO FL200 WOULD MOVE TOWARDS THE WEST AT 10 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 25/1000 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