FVXX21 KWBC 221800 VOLCANIC ASH ADVISORY ISSUED 1800 UTC 22 JUL 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-857 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE AND INFRARED AND MULTISPECTRAL IMAGERY. GEOPHYSICAL INSTITUTE. GUAYAQUIL MWO. . ERUPTION DETAILS: EXPLOSION WITH HEAVY ASH EMISSION AROUND 21/2220 UTC. . DETAILS OF ASH: THE MOST RECENT OBSERVATION OF ASH OVER THE VOLCANO WAS AT 22/1302 UTC WITH ASH TO FL230 MOVING TOWARDS THE SOUTHWEST. LOW AND MID LEVEL CLOUDS COVER THE VOLCANO MAKING IT DIFFICULT TO DETECT ANY CLOUDS IN THE IMAGERY. . TRAJECTORY: ACCORDING TO THE AVIATION MODEL ANY ASH FROM THE SUMMIT TO FL230 WILL MOVE TOWARDS THE SOUTHWEST OR WEST AT 15 KTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT STATEMENT WILL BE ISSUED BY 23/0000 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. . KARST . NNNN