FVXX21 KWBC 252000 VOLCANIC ASH ADVISORY ISSUED 2000 UTC 25 SEP 2000 BY THE WASHINGTON VAAC . . TUNGURAHUA 00-1109 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY. THE GEOPHYSICAL INSTITUTE. . ERUPTION DETAILS: NO RECENT ASH EMISSIONS ERUPTION DETAILS: 5 MINUTE EXPLOSION AT 25/1319 UTC . DETAILS OF ASH: THE GEOPHYSICAL INSTITUTE REPORTED AN MODERATE EXPLOSION OF ASH AT 25/1319 UTC LASTING FOR 5 MINUTES. LOCAL AIRCRAFT AT 25/1355 UTC INDICATED ASH AT FL270 MOVING WEST. SATELLITE IMAGERY THROUGH 25/1915 UTC DOES NOT SHOW ANY ASH ALTHOUGH THERE IS EXTENSIVE THICK CLOUDINESS PRESENT. TRAJECTORY: ANY ASH NEAR FL270 WOULD MOVE WEST AT 10 TO 15 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 26/0200 UTC. . REAL TIME SATELLITE IMAGERY AND VOLCANIC ASH ADVISORIES 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. . NNNN