FVXX20 KWBC 180500 VOLCANIC ASH ADVISORY ISSUED: 2001AUG18/0500Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S 7826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2001/186 . INFORMATION SOURCE: GOES-8 VISIBLE..INFRARED..MULTISPECTRAL IMAGERY. GUAYAQUIL METEOROLOGICAL WATCH OFFICE. SIX HOUR WIND FORECAST FROM THE 18/0000Z AVIATION MODEL. . ERUPTION DETAILS: NEARLY CONTINUOUS ERUPTION SINCE 06/1203Z. . DETAILS OF ASH CLOUD: GOES-8 IMAGERY THROUGH 18/0415Z DOES NOT SHOW A WELL DEFINED PLUME. DISPERSED ASH PROBABLY STILL EXISTS MAINLY WEST OF THE SUMMIT. . TRAJECTORY: ASH FROM THE SUMMIT LEVEL TO FL220 WILL MOVE TO THE WEST AT 5 TO 10 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT ADVISORY WILL BE ISSUED BY 18/1100Z. . 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