FVXX20 KWBC 221600 VOLCANIC ASH ADVISORY ISSUED 1600 UTC 22 OCT 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-1170 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE...INFRARED...AND MULTISPECTRAL IMAGERY. 22/1800 UTC FORECAST UPPER WINDS FROM THE 22/0600 UTC AVIATION MODEL. GOES-8 DERIVED WINDS. GUAYAQUIL METEOROLOGICAL WATCH OFFICE. . ERUPTION DETAILS: REPORT OF ASH AT 1325 UTC WITH OBSERVED POSSIBLE ASH AT 1345 UTC. . DETAILS OF ASH CLOUD: THE MWO IN GUAYAQUIL INDICATED A RECENT PILOT REPORT OF ASH OBSERVED AT 1325 UTC TO FL260 MOVING WEST. GOES-8 IMAGERY AT 1345 UTC DID SHOW A SMALL ASH CLOUD BUT THIS CLOUD MOVED EAST NORTHEAST OF THE VOLCANO AND QUICKLY DISSIPATED. THIS COINCIDES WITH A PILOT REPORT OF ASH TO FL250 OBSERVED AT 1338 UTC. CURRENT GOES-8 IMAGERY THROUGH 1545 DOES NOT INDICATE THE PRESENCE OF ASH. EXTRAPOLATION OF THE OBSERVED CLOUD PLACES IT NEAR 0114S 7747W WITH A RADIUS OF 25 KM AROUND THE POINT. ESTIMATED ASH HEIGHT IS FL250 BASED ON REPORTS AND UPPER AIR SOUNDING FORECAST. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH UP TO FL200 TO MOVE WEST AT 10 TO 15 KNOTS. ASH ABOVE FL200 WOULD MOVE NORTHEAST AT 5 TO 10 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 22/2200 UTC. . 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. . HUGHES . NNNN