FVXX20 KWBC 260600 VOLCANIC ASH ADVISORY ISSUED: 2001APR26/0600Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S 7826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2001/56 . INFORMATION SOURCE: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. WIND FORECAST FROM THE AVIATION MODEL. GUAYAQUIL METEOROLOGICAL WATCH OFFICE SIGMET. . ERUPTION DETAILS: ASH EMISSION AT 25/2100Z. . DETAILS OF ASH CLOUD: NO ASH IS SEEN IN SATELLITE IMAGERY THROUGH 26/0415Z. HOWEVER LOW LEVEL METEOROLOGICAL CLOUDS IN THE AREA MIGHT BE HINDERING ASH DETECTION. THE MOST RECENT KNOWN REPORT OF ASH WAS AT 25/2100Z WHEN AN AIRCRAFT REPORTED ASH OVER THE VOLCANO TO FL230. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH FROM THE SUMMIT TO FL230 WOULD MOVE TOWARDS THE WEST AT 10 TO 25 KNOTS. . OUTLOOK: SEE SIGMETS. . THIS WILL BE 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