FVXX21 KWBC 202330 VOLCANIC ASH ADVISORY STATEMENT ISSUED 2330 UTC 20 MAR 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-338 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE...INFRARED AND MULTISPECTRAL IMAGERY. 21/0000 UTC WIND FORECAST FROM THE 20/1200 UTC AVN MODEL. NOAA-14 VISIBLE...INFRARED AND MULTISPECTRAL IMAGERY. . ERUPTION DETAILS: LAST ERUPTION AT 20/1640 UTC. . DETAILS OF ASH: THE ASH FROM THE PREVIOUS ERUPTION HAS DISSIPATED ENOUGH THAT IT IS NOT DETECTABLE IN GOES IMAGERY THROUGH 2315 UTC AND HIGH RESOLUTION NOAA-14 IMAGERY AT 2124 UTC. EXTRAPOLATION OF THE ASH CLOUD FROM THE 1640 UTC ERUPTION PUTS IT WITHIN 25 KM (14 NMI) OF A POINT 0036S 7956W. THE HEIGHT IS ESTIMATED TO BE AT FL300. AGAIN...THIS CLOUD CAN NOT BE SEEN IN CURRENT SATELLITE IMAGERY. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH AT FL300 WOULD MOVE WEST NORTHWEST AT 15 TO 20 KNOTS. ASH BETWEEN FL300 AND FL200 WOULD MOVE WEST AT 15 KNOTS. ASH BELOW FL200 WOULD MOVE WEST AT 5 TO 10 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT STATEMENT WILL BE ISSUED BY 21/0530 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