FVXX21 KWBC 230430 VOLCANIC ASH ADVISORY ISSUED: 2001SEP23/0430 VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S 7826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2001/274 . INFORMATION SOURCE: GOES-8/10 INFRARED AND MULTISPECTRAL IMAGERY. GUAYAQUIL METEOROLOGICAL WATCH OFFICE. AVIATION MODEL UPPER WINDS FORECAST. . ERUPTION DETAILS: LAST REPORT OF ASH AT 22/2130Z. . DETAILS OF ASH CLOUD: GOES-8 IMAGERY THROUGH 0315Z AND GOES-10 THROUGH 0400Z DOES NOT INDICATE THE PRESENCE OF ASH. THE VOLCANO REMAINS IN AN ACTIVE STATE AND COULD PRODUCE NEAR SUMMIT ASH EMISSIONS AT ANYTIME. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH AT OR NEAR SUMMIT LEVEL TO FL300 WOULD MOVE WEST AT 10 TO 15 KNOTS. ANY ASH ABOVE FL300 WOULD MOVE SOUTHWEST AT 5 TO 10 KNOTS. . OUTLOOK: SEE SIGMETS. . THIS WILL BE THE LAST ADVISORY ISSUED ON 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