FVXX21 KWBC 110700 VOLCANIC ASH ADVISORY ISSUED 0700 UTC 11 AUG 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-937 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. AUGUST 10 GEOPHYSICAL INSTITUTE REPORT. . ERUPTION DETAILS: GASES AND OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: NO ASH CAN BE SEEN IN SATELLITE IMAGERY THROUGH 11/0615 UTC POSSIBLY BECAUSE OF THE WEATHER CLOUDS OVER THE AREA. ON AUGUST 10 THE GEOPHYSICAL INSTITUTE REPORTED VARIABLE ACTIVITY AT THE VOLCANO WITH THICK COURSE GRAIN ASH NEAR THE SUMMIT AT TIMES. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH BETWEEN THE SUMMIT AND FL250 WOULD MOVE TOWARDS THE WEST AT ABOUT 15 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 11/1300 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