FVXX20 KWBC 231330 VOLCANIC ASH ADVISORY ISSUED 1320 UTC 23 JUL 2000 BY THE WASHINGTON VAAC . GUAGUA PICHINCHA 00-178 ECUADOR 0011S 7836W . BACKGROUND: GUAGUA PICHINCHA ECUADOR (1502-02) SUMMIT HEIGHT 15695 FT (4784 M) . SOURCES OF INFORMATION: GUAYAQUIL METEOROLOGICAL WATCH OFFICE SIGMET...GEOPHYSICAL INSTITUTE REPORT...GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY . ERUPTION DETAILS: ONGOING ASH EMISSION . DETAILS OF ASH CLOUD: THE GEOPHYSICAL INSTITUTE REPORTS AN ONGOING ASH EMISSION TO FL180. NO ASH CAN BE SEEN IN IMAGERY THROUGH 23/1245 UTC POSSIBLY DUE TO SOME LOW LEVEL CLOUDS IN THE VICINITY. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ASH BETWEEN THE SUMMIT AND FL180 WOULD MOVE TO THE SOUTHWEST AT 15 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS . THE NEXT MESSAGE WILL BE ISSUED BY 23/1930 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