FVXX20 KWBC 180045 VOLCANIC ASH ADVISORY ISSUED: 2001MAY18/0045Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S 7826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2001/62 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: DUE TO HIGHER LEVEL CLOUD COVER OVER THE REGION NO ASH CLOUD CAN BE SEEN FROM SATELLITE IMAGERY THROUGH 18/0015Z. THE GEOPHYSICAL INSTITUTE HAS UPDATED THEIR ESTIMATED HEIGHT OF THE ASH CLOUD BASED ON SURFACE OBSERVATION TO AROUND FL320 AND MOVING SOUTHWEST. . TRAJECTORY: ASH BETWEEN FL160 AND AROUND FL320 IS FORECAST TO MOVE SOUTHWESTERLY AROUND 15 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT ADVISORY WILL BE ISSUED BY 18/0600Z. . 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