FVXX21 KWBC 241640 VOLCANIC ASH ADVISORY STATEMENT ISSUED 1640 UTC 24 MAY 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-608 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE...INFRARED AND MULTISPECTRAL IMAGERY. GEOPHYSICAL INSTITUTE IN QUITO. 24/1800 UTC FORECAST UPPER WINDS FROM THE 24/0600 UTC AVIATION MODEL. . ERUPTION DETAILS: NEARLY CONTINUOUS GAS AND ASH EMISSIONS. . DETAILS OF ASH: GOES-8 IMAGERY THROUGH 1615 UTC SHOWS BROKEN TO OVERCAST LOW AND MID LEVEL CLOUDS OBSCURING THE VIEW OF ANY ASH AT OR NEAR THE SUMMIT. THE GEOPHYSICAL INSTITUTE REPORTS THAT THERE WERE TWO MODERATE EXPLOSIONS EARLIER THIS MORNING. HOWEVER GROUND OBSERVERS COULD NOT SEE ANY ASH DUE TO THE CONSTANT CLOUD COVER. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH AT OR NEAR SUMMIT LEVEL TO MOVE WEST AT 15 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 24/2230 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. . HUGHES . NNNN