FVXX21 KWBC 111900 VOLCANIC ASH ADVISORY ISSUED 1900 UTC 11 AUG 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-939 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY. SIX HOUR WIND FORECAST FROM THE 11/1200 UTC AVIATION MODEL. . ERUPTION DETAILS: GASES AND OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: ASH IS NOT SEEN ON SATELLITE IMAGERY THROUGH 11/1245 UTC. AT 11/1634 HOWEVER THE GEOPHYSICAL INSTITUTE DID OBSERVE ASH OVER THE SUMMIT TO FL240 MOVING TOWARDS THE SOUTHWEST. . TRAJECTORY: ANY ASH BETWEEN THE SUMMIT AND FL240 WILL MOVE TOWARDS WEST AT 15 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 12/0100 UTC. . REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER 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. . WALTER . NNNN