FVXX20 KWBC 291745 VOLCANIC ASH ADVISORY ISSUED: 2001APR29/1745Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S 7826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2001/58 . INFORMATION SOURCE: GOES-8 VISIBLE AND INFRARED AND MULTISPECTRAL IMAGERY. WIND FORECAST FROM THE AVIATION MODEL. GUAYAQUIL METEOROLOGICAL WATCH OFFICE SIGMET. GEOPHYSICAL INSTITUTE REPORT . ERUPTION DETAILS: POSSIBLE ASH EMISSION AT 29/1630Z. . DETAILS OF ASH CLOUD: THE GEOPHYSICAL INSTITUTE REPORTED A VOLCANIC CLOUD OVER TUNGURAHUA AT 29/1630Z. EXTENSIVE CLOUDS COVER THE REGION OVER THE VOLCANO MAKING ANY DETECTION OF ASH DIFFICULT FROM SATELLITE IMAGERY. ASH HEIGHT IS NOT KNOWN. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH FROM THE SUMMIT TO FL230 WOULD MOVE TOWARDS THE WEST SOUTHWEST AT 20 KTS. . OUTLOOK: SEE SIGMETS. . THIS IS THE ONLY 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. . KARST . NNNN