FVXX21 KWBC 230800 VOLCANIC ASH ADVISORY ISSUED 0800 UTC 23 JUL 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-860 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. SIX HOUR FORECAST FROM THE 23/0000 UTC MODEL RUN. . ERUPTION DETAILS: OCCASIONAL EMISSIONS OF ASH AND STEAM... . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 23/0745 UTC SHOWS NO CURRENT ASH PLUME. SCATTERED CLOUDS IN THE VICINITY OF THE VOLCANO ARE MAKING ASH DETECTION DIFFICULT. . TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL290 WOULD MOVE TO THE NORTHWEST AT 10 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 23/1400 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