FVXX21 KWBC 170730 VOLCANIC ASH ADVISORY ISSUED: 2001SEP17/0730 VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S 7826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2001/250 . INFORMATION SOURCE: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. SIX HOUR WIND FORECAST FROM THE 17/0000Z AVIATION MODEL. GUAYAQUIL METEOROLOGICAL WATCH OFFICE. . ERUPTION DETAILS: NEARLY CONTINUOUS NEAR SUMMIT LIGHT ASH FLOW. . DETAILS OF ASH CLOUD: ASH IS NOT SEEN IN THE SATELLITE IMAGERY THROUGH 17/0715Z. THE AREA AROUND THE SUMMIT HOWEVER IS BLANKETED BY CLOUDS MAKING DETECTION OF ASH DIFFICULT. . TRAJECTORY: ASH FROM THE SUMMIT TO FL300 WILL MOVE TOWARDS THE WEST AT 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 17/1330Z. . 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. . WALTER . NNNN