FVXX21 KWBC 311330 VOLCANIC ASH ADVISORY STATEMENT ISSUED 1330 UTC 31 MAY 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-636 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE..INFRARED AND MULTISPECTRAL IMAGERY. 6 HOUR WIND FORECAST FROM THE 31/0600 UTC AVIATION MODEL. . ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS. . DETAILS OF ASH: LATEST SATELLITE IMAGERY THROUGH 31/1245 UTC SHOWS THICK LAYERED CLOUDS OVER THE SUMMIT MAKING DETECTION OF ASH DIFFICULT. THE GEOPHYSICAL INSTITUTE DID REPORT ASH OVER THE SUMMIT AT 31/0940 UTC TO FL230. TRAJECTORY: ASH FROM THE SUMMIT TO FL230 WOULD MOVE TOWARDS THE WEST-SOUTHWEST AT 15-20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 31/1930 UTC. . REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC ASH ADVISORY STATEMENTS 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