FVXX21 KWBC 061630 VOLCANIC ASH ADVISORY STATEMENT ISSUED 1620 UTC 06 MAY 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-533 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY...12 HOUR WINDS FORECAST FROM THE 06 UTC AVIATION MODEL...SIGMET FROM GUAYAQUIL METEOROLOGICAL WATCH OFFICE. . ERUPTION DETAILS: OCCASSIONAL GAS AND ASH EMISSIONS. . DETAILS OF ASH: WEATHER OVER THE AREA IS LIMITING OBSERVATIONS FROM GOES-8 IMAGERY THROUGH 1545 UTC. A SIGMET FROM THE GUAYAQUIL MWO INDICATES THAT A PROBABLE ASH CLOUD HAS BEEN OBSERVED OVER THE VOLCANO. HEIGHT OF THE ASH IS UNKNOWN. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT IF THERE IS ANY ASH BETWEEN THE SUMMIT AND FL250 IT WOULD MOVE TOWARD THE WEST OR WEST SOUTHWEST AT 20 TO 30 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 06/2230 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. . NNNN