FVXX21 KWBC 130930 VOLCANIC ASH ADVISORY ISSUED 0930 UTC 13 JUN 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-691 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. WIND FORECAST FROM THE AVIATION MODEL. GEOPHYSICAL INSTITUTE REPORT. SIGMETS FROM GUAYAQUIL METEOROLOGICAL WATCH OFFICE . ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS. . DETAILS OF ASH: A GUAYAQUIL SIGMET REPORTS THAT AT 13/0606 UTC THE GEOPHYSICAL INSTITUTE OBSERVED ASH TO FL290 OVER THE VOLCANO. AN INTERMITTENT HOTSPOT IS SEEN IN SHORTWAVE INFRARED IMAGERY. NO ASH CAN BE SEEN IN INFRARED AND MULTISPECTRAL IMAGERY THROUGH 13/0845 UTC BUT LOW LEVEL WEATHER CLOUDS IN THE AREA COULD BE HINDERING ASH DETECTION. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH BETWEEN THE SUMMIT AND FL290 WOULD MOVE TOWARD THE WEST AT ABOUT 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 13/1530 UTC. . REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER 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. . NNNN