FVXX21 KWBC 231850 VOLCANIC ASH ADVISORY STATEMENT ISSUED 1850 UTC 23 APR 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-478 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE...INFRARED AND MULTISPECTRAL IMAGERY. UPPER LEVEL WINDS FORECAST FROM THE AVIATION MODEL. . ERUPTION DETAILS: CONTINUOUS GASES AND ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 23/1815 UTC SHOWS CLOUDS OVER THE AREA OF THE VOLCANO MAKING DETECTION OF ASH DIFFICULT. THERE HAVE BEEN NO SURFACE BASED BEPORTS EITHER DUE TO THE CLOUD COVER. . TRAJECTORY: ANY ASH TO FL250 WOULD MOVE TOWARD THE WEST AROUND 10 TO 15 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 24/0100 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