FVXX21 KWBC 161130 VOLCANIC ASH ADVISORY ISSUED 1130 UTC 16 SEP 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-1084 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. 16/1200 UTC FORECAST UPPER WINDS FROM THE 16/0600 UTC AVIATION MODEL. THE GEOPHYSICAL INSTITUTE IN QUITO. . ERUPTION DETAILS: OCCASIONAL STEAM AND ASH EMISSIONS. . DETAILS OF ASH: GOES-8 IMAGERY THROUGH 1115 UTC DOES NOT INDICATE THE PRESENCE OF ASH AT OR NEAR THE VOLCANO. THE GEOPHYSICAL INSTITUTE REPORTS THAT THERE HAS BEEN VERY LITTLE ACTIVITY OVERNIGHT AND SEISMIC LEVELS REMAIN NORMAL. THE VOLCANO IS STILL ACTIVE AND COULD PRODUCE ASH AT ANYTIME. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH AT OR NEAR SUMMIT LEVEL TO MOVE WEST AT 15 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 16/1730 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