FVXX21 KWBC 070530 VOLCANIC ASH ADVISORY ISSUED 0530 UTC 07 JUL 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-792 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. SIX HOUR WIND FORECAST FROM THE 07/0000 UTC AVIATION MODEL. SIGMET FROM GUAYAQUIL METEOROLOGICAL WATCH OFFICE. . ERUPTION DETAILS: GAS AND OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: ASH IS NOT SEEN IN THE SATELLITE IMAGERY THROUGH 07/0445 UTC. HOWEVER AT 06/1851 THE GEOPHYSICAL INSTITUTE REPORTED VOLCANIC ASH OVER THE VOLCANO AT UNKNOWN HEIGHT. . TRAJECTORY: ANY ASH BETWEEN THE SUMMIT AND FL220 WOULD MOVE TOWARDS THE WEST-SOUTHWEST AT 10 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 07/1130 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