FVXX21 KWBC 131900 VOLCANIC ASH ADVISORY ISSUED: 2001SEP13/1900Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S 7826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2001/235 . INFORMATION SOURCE: GOES-8 VISIBLE/INFRARED/MULTISPECTRAL IMAGERY. GUAYAQUIL MWO. 13/1800Z UPPER AIR FORECAST WINDS FROM THE 13/1200Z AVIATION MODEL. . ERUPTION DETAILS: AIRCRAFT REPORT OF ASH AT 13/1248Z. . DETAILS OF ASH CLOUD: GOES-8 IMAGERY THROUGH 1845Z DOES NOT INDICATE THE PRESENCE OF ASH. THERE ARE EXTENSIVE LOW AND MID LEVEL CLOUDS OBSCURING THE VOLCANO..SO THERE MAY BE ASH PRESENT NEAR SUMMIT LEVEL. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH AT OR NEAR SUMMIT LEVEL TO FL250 WOULD MOVE WEST AT 5 TO 10 KNOTS. . OUTLOOK: SEE SIGMETS. . THIS WILL BE THE LAST ADVISORY ISSUED FOR THIS EVENT. . 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. . HUGHES . NNNN