FVXX20 KWBC 281855 VOLCANIC ASH ADVISORY ISSUED: 2001SEP28/1855Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S 7826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2001/281 . INFORMATION SOURCE: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY. GUAYAQUIL METEOROLOGICAL WATCH OFFICE. GEOPHYSICAL INSTITUTE. SIX HOUR UPPER WINDS FORECAST FROM 28/1200Z. . ERUPTION DETAILS: ASH REPORTED OVER THE VOLCANO AT 28/1451Z. . DETAILS OF ASH CLOUD: THE GUAYAQUIL MWO REPORTS ASH OVER THE SUMMIT AT 28/1451Z TO FL200. SATELLITE IMAGERY THROUGH 28/1815Z SHOWS NO CURRENT INDICATION OF ASH. LOW AND MIDDLE LAYER CLOUDS ARE OBSCURING THE VOLCANO. . TRAJECTORY: UPPER PATTERNS SUGGEST THAT ANY ASH AT FL200 WOULD MOVE WESTWARD AT 15 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 0100Z. . INTERNET URLS... MESSAGE LISTSERV WWW.SSD.NOAA.GOV/VAAC/SUBSCRIBE.HTML MESSAGES GRAPHICS AND IMAGERY WWW.SSD.NOAA.GOV/VAAC/WASHINGTON.HTML (ALL LOWERCASE EXCEPT /VAAC/) . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . . NNNN