FVXX21 KWBC 131030 VOLCANIC ASH ADVISORY ISSUED 1030 UTC 13 JUL 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-816 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. GUAYAQUIL METEOROLOGICAL WATCH OFFICE SIGMET . ERUPTION DETAILS: GASES WITH OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: A GUAYAQUIL SIGMET REPORTS THAT AT 13/0833 UTC VOLCANIC ASH TO FL260 WAS OBSERVED BY THE GEOPHYSICAL INSTITUTE. NO ASH CAN BE SEEN IN SATELLITE IMAGERY THROUGH 0945 UTC POSSIBLY BECAUSE OF THE LOW LEVEL WEATHER CLOUDS IN THE AREA. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH BETWEEN THE SUMMIT AND FL260 WOULD MOVE TOWARD THE WEST AT ABOUT 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 13/1630 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