FVXX21 KWBC 272300 VOLCANIC ASH ADVISORY ISSUED 2300 UTC 27 JUN 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-753 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE..INFRARED AND MULTISPECTRAL IMAGERY. THE GEOPHYSICAL INSTITUTE IN QUITO. WINDS FORECAST FROM THE AVIATION MODEL. . ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS. . DETAILS OF ASH: THE GEOPHYSICAL INSTITUTE REPORTED A MODERATE EXPLOSION OF THE VOLCANO AT 27/2216 UTC EMITTING GASES AND A SMALL AMOUNT OF ASH. SATELLITE IMAGERY THROUGH 27/2245 UTC SHOWS SCATTERED CLOUDS OVER THE SUMMIT MAKING ASH DETECTION DIFFICULT AT THIS TIME. THE GEOPHYSICAL INSTITUTE ESTIMATED THE ASH TO FL270 MOVING WEST. . TRAJECTORY: ANY ASH THAT MAY EXIST FROM THE SUMMIT TO FL270 WILL MOVE TO THE WEST AT 10 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 28/0500 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. . CLARK . NNNN