FVXX21 KWBC 231630 VOLCANIC ASH ADVISORY STATEMENT ISSUED 1630 UTC 23 MAR 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-349 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: UPPER WINDS FORECAST FROM THE 23/0600 UTC AVIATION MODEL...GOES-8 VISIBLE AND INFRARED AND MULTISPECTRAL IMAGERY. . ERUPTION DETAILS: SMALL EXPLOSIONS REPORTED. . DETAILS OF ASH: THE LATEST SATELLITE IMAGE AT 23/1545 UTC CONTINUES TO SHOW LOW AND MID LEVEL CLOUDS IN THE VICINITY OF THE VOLCANO MAKING IT DIFFICULT TO DETECT VOLCANIC ASH. THE GEOPHYSICAL INSTITUTE REPORTS VOLCANIC ASH OVER THE VOLCANO AT 23/1437 UTC. . TRAJECTORY: ANY ASH THAT MAY EXIST BETWEEN THE SUMMIT AND FL240 WOULD MOVE TOWARDS THE WEST SOUTHWEST AT 10 TO 15 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT STATEMENT WILL BE ISSUED BY 23/2230 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. . KARST . NNNN