FVXX21 KWBC 250300 VOLCANIC ASH ADVISORY ISSUED 0300 UTC 25 AUG 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-0993 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. . ERUPTION DETAILS: GAS AND OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 25/0145 UTC SHOWS EXTENSIVE LOW AND MID LEVEL CLOUDS IN THE VICINITY OF THE VOLCANO MAKING IT DIFFICULT TO DETECT ANY ASH. . TRAJECTORY: ANY ASH AT SUMMIT LEVEL WILL MOVE TOWARDS THE WEST AT 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 25/0900 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. . KARST . NNNN