FVXX21 KWBC 071200 VOLCANIC ASH ADVISORY ISSUED 1200 UTC 07 JUN 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-667 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE AND INFRARED AND MULTISPECTRAL IMAGERY. 6 HOUR UPPER LEVEL WIND FORECAST FROM TH AVIATION MODEL. . ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS. . DETAILS OF ASH: EARLY MORNING VISIBLE IMAGERY THROUGH 07/1145 UTC DOES NOT SHOW THE PLUME THAT WAS EVIDENT YESTERDAY. THE VOLCANO REMAINS UNSTABLE AND AN ERUPTION CAN OCCUR AT ANY TIME. . TRAJECTORY: ANY ASH BETWEEN THE SUMMIT AND FL250 WILL MOVE TOWARDS THE WEST AT 15 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT MESSAGE WILL BE ISSUED BY 07/1800 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. . KARST . NNNN