FVXX21 KWBC 072330 VOLCANIC ASH ADVISORY ISSUED 2330 UTC 07 JUL 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-795 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 AVIATION MODEL. SIGMET FROM GUAYAQUIL METEOROLOGICAL WATCH OFFICE. . ERUPTION DETAILS: GAS AND OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: THE GEOPHYSICAL INSTITUTE REPORTED VOLCANIC ASH OVER THE VOLCANO AT 07/2051 UTC TO FL280 MOVING WEST. EXTENSIVE LOW AND MID LEVEL CLOUDINESS OVER THE VOLCANO MAKES IT DIFFICULT TO DISCERN ANY ASH FROM SATELLITE IMAGERY. . TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL280 WILL MOVE TOWARDS THE WEST OR NORTHWEST AT LESS THAN 10 KTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 08/0530 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