FVXX20 KWBC 180500 VOLCANIC ASH ADVISORY ISSUED 0500 UTC 18 JUL 2000 BY THE WASHINGTON VAAC . GUAGUA PICHINCHA 00-172 ECUADOR 0011S 7836W . BACKGROUND: GUAGUA PICHINCHA ECUADOR (1502-02) SUMMIT HEIGHT 15695 FT (4784 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. 18/0600 UTC FORECAST UPPER WINDS FROM THE 17/1800 UTC MODEL RUN. . ERUPTION DETAILS: ASH EMISSION AT 17/2130 UTC. . DETAILS OF ASH CLOUD: GOES-8 IMAGERY THROUGH 0445 UTC SHOWS MID AND LOW LEVEL CLOUDS PARTIALLY OBSCURING THE VIEW OF THE VOLCANO. NO OTHER ASH REPORTS HAVE BEEN RECEIVED. TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH AT SUMMIT LEVEL WOULD MOVE WEST AT 5 TO 10 KNOTS. . OUTLOOK: SEE SIGMETS. . THIS WILL BE THE LAST ADVISORY ISSUED FOR THIS EVENT. . 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. . HUGHES . NNNN