FVXX20 KWBC 180600 VOLCANIC ASH ADVISORY ISSUED: 2001MAY18/0600Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S 7826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2001/63 INFORMATION SOURCE: GUAYAQUIL SIGMET. GEOPHYSICAL INSTITUTE REPORT. GOES 8 INFRARED AND MULTISPECTRAL IMAGERY. AVIATION MODEL WIND FORECAST. . ERUPTION DETAILS: ERUPTION OCCURRED AROUND 17/2330Z. . DETAILS OF ASH CLOUD: THE GEOPHYSICAL INSTITUTE REPORTED AN ERUPTION TO FL320 WITH ASH MOVING SOUTHWEST BASED ON A SURFACE OBSERVATION. NO ASH HAS BEEN OBSERVED IN SATELLITE IMAGERY THROUGH 0515Z ALTHOUGH THERE HAVE BEEN EXTENSIVE CLOUDS IN THE AREA. . TRAJECTORY: ASH BETWEEN FL160 AND AROUND FL320 IS FORECAST TO MOVE SOUTHWESTERLY AROUND 15 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THIS IS THE LAST ADVISORY ON THIS EVENT. . REAL TIME SATELLITE IMAGERY AND VOLCANIC ASH ADVISORIES 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