FVXX20 KWBC 151830 VOLCANIC ASH ADVISORY ISSUED: 2001APR15/1830 VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S 7826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2001/53. INFORMATION SOURCE: GOES-8 VISIBLE..INFRARED AND MULTISPECTRAL IMAGERY. GEOPHYSICAL INSTITUTE IN QUITO. 6 HOUR WIND FORECAST FROM THE 15/1200Z AVIATION MODEL. . ERUPTION DETAILS: ASH CLOUD REPORTED AT 15/1640Z. . DETAILS OF ASH CLOUD: THE GEOPHYSICAL INSTITUTE IN QUITO REPORTED ASH OVER THE VOLCANO AT 15/1640Z TO FL230. THIS ASH WAS MOVING TO THE WEST. ASH IS NOT SEEN IN THE SATELLITE IMAGERY THOUGH 15/1745Z. IN ADDITION..CONSIDERABLE CLOUDS AROUND THE VOLCANO IS MAKING DETECTION OF ASH DIFFICULT. . TRAJECTORY: ASH AT FL230 WILL MOVE TOWARDS THE WEST AT 15 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 16/0030Z. . 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. . WALTER/BROWN . NNNN