FVXX21 KWBC 110100 VOLCANIC ASH ADVISORY ISSUED 0100 UTC 11 AUG 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-936 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. GEOPHYSICAL INSTITUTE REPORT. . ERUPTION DETAILS: GASES AND OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: THROUGH SCATTERED CLOUD COVER NO ASH HAS BEEN DETECTED IN SATELLITE IMAGERY THROUGH 10/2315 UTC. THE GEOPHYSICAL INSTITUTE REPORTS VARIABLE ACTIVITY AT THE VOLCANO WITH THICK COURSE GRAIN ASH NEAR THE SUMMIT AT TIMES. GENERALLY COURSE ASH DOES NOT TRAVEL AS FAR DOWNWIND FROM THE VOLCANO AS LIGHT ASH PARTICLES. . TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL250 WILL MOVE TOWARDS THE WEST AROUND 15 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 11/0700 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. . . NNNN