FVXX20 KWBC 190400 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0400 UTC 19 NOV 1999 BY THE WASHINGTON VAAC . GUAGUA PICHINCHA 99-098 ECUADOR 0.17S 78.60W . BACKGROUND: GUAGUA PICHINCHA ECUADOR (1502-02) SUMMIT HEIGHT 15695 FT (4784 M) . SOURCES OF INFORMATION: GEOLOGICAL PERSONNEL IN QUITO...GOES-8 MULTISPECTRAL IMAGERY. UPPER AIR WIND REPORTS FROM THE INSTITUTO GEOFISICO IN QUITO. . ERUPTION DETAILS: THE INSTITUTO GEOFISICO REPORTED A MAJOR ERUPTION AROUND 0227 UTC. . DETAILS OF ASH CLOUD: GOES 8 IMAGERY THROUGH 0315 UTC SHOWS THE DETECTABLE ERUPTION CLOUD SNAKING WEST (260 DEGREES) FROM THE VOLCANO AROUND 87 KM (47 NMI) AND WAS ROUGHLY 40 KM 22 NMI WIDE. THE LEADING EDGE OF THE CLOUD IS MOVING WEST AROUND 35 KNOTS WHICH WOULD INDICATE IT TO BE SLIGHTLY HIGHER THEN THE TRAILING PART OF THE DETECTABLE ASH CLOUD WHICH WAS MOVING SLIGHTLY SOUTH OF WEST AROUND 25 KNOTS. THE HIGHEST LEVEL OF THE ASH CLOUD IS ESTIMATED TO AROUND FL400 BASED ON THIS EVENINGS SOUNDING AT GUAGUA. THERE ARE SOME UNDERLYING METEOROLOGICAL CLOUD SO NOT ALL THE ERUPTION CLOUD MAY NOT BE DETECTABLE. . TRAJECTORY: ASH FROM THE SUMMIT TO FL300 WILL MOVE TO THE WEST AT 15 TO 20 KTS. ASH BETWEEN FL300 TO FL350 WILL MOVE TO THE SOUTHWEST AT 25 KTS. AND ASH FROM FL350 TO FL400 WILL MOVE WEST AROUND 35 TO 40 KNOTS. . REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC ASH ADVISORY STATEMENTS 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/) . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT STATEMENT WILL BE ISSUED 19/1000 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN"Attached Graphic Map Depicting Ash"