FVXX21 KWBC 252300 VOLCANIC ASH ADVISORY STATEMENT ISSUED 2300 UTC 25 MAY 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-613 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE ... INFRARED AND MULTISPECTRAL IMAGERY. 12 HOUR FORECAST FROM THE 12 UTC AVIATION MODEL. GEOPHYSICAL INSTITUTE . ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS. . DETAILS OF ASH: THE GEOPHYSICAL INSTITUTE REPORTS THAT A LARGE EXPLOSION OCCURRED AT 2230 UTC PRODUCING AN ASH COLUMN ESTIMATED BY GROUND OBSERVERS TO FL300. THE ASH IS MOVING FROM THE SUMMIT TO THE WEST. SATELLITE IMAGERY THROUGH 2245 UTC SHOWS DENSE CLOUDS OVER THE AREA MAKING ASH DETECTION DIFFICULT. . TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL300 WILL MOVE WEST AT 20 TO 30 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 26/0500 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