FVXX21 KWBC 170730 VOLCANIC ASH ADVISORY ISSUED 0730 UTC 17 JUN 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-707 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. 6 HOUR WIND FORECAST FROM 17/0000 UTC AVIATION MODEL. . ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 17/0645 UTC SHOWED EXTENSIVE CLOUDS OVER THE VOLCANO MAKING ANY DETECTION OF ASH DIFFICULT. . TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL230 WOULD MOVE TOWARDS THE WEST-SOUTHWEST AT 20 KTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 17/1330 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