FVXX21 KWBC 312130 VOLCANIC ASH ADVISORY ISSUED 2120 UTC 31 MAY 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-638 ECUADOR 1.47S 78.44W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GEOPHYSICAL INSTITUTE IN QUITO...GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY...UPPER AIR WIND FORECAST FROM THE AVIATION MODEL...SIGMET FROM GUAYAQUIL METEOROLOGICAL WATCH OFFICE. . ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS WITH SEVERAL EXPLOSIONS. . DETAILS OF ASH: THE GEOPHYSICAL INSTITUTE REPORTS THREE EXPLOSIONS TODAY AND THE MOST RECENT EXPLOSION AT 2017 UTC PRODUCED ASH TO FL300. NO ASH CAN BE DETECTED IN SATELLITE IMAGERY THROUGH 31/2015 UTC DUE TO WEATHER CLOUDS COVERING THE AREA. . TRAJECTORY: UPPER AIR WIND PATTERNS SUGGEST THAT ANY ASH BETWEEN THE SUMMIT AND FL300 WOULD MOVE TOWARD THE WEST AT 10 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT STATEMENT WILL BE ISSUED BY 01/0330 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. . NNNN