FVXX20 KWBC 221815 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1815 UTC 22 SEPTEMBER 1999 BY THE WASHINGTON VAAC . GUAGUA PICHINCHA 99-015 ECUADOR 0.17S 78.60W . BACKGROUND: GUAGUA PICHINCHA (1502-02) SUMMIT HEIGHT 15,695FT (4784 M) . SOURCES OF INFORMATION: SIGMET FROM GUAYAQUIL MWO. GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. ERUPTION DETAILS: ERUPTION AT APPROXIMATELY 22/1510 UTC. . DETAILS OF ASH CLOUD: THE GEOPHYSICAL INSTITUTE REPORTED AN ERUPTION OF VAPOR AND VOLCANIC ASH TO FL250. THE GOES-8 MULTISPECTRAL IMAGERY AT 1645 UTC SHOWED POSSIBLE ASH MOVING WESTWARD AND DISSIPATING BY 1715 UTC. . TRAJECTORY: ASH AT FL250 MOVING NNW AT 5 TO 10 KTS. . 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 www.ssd.noaa.gov/VAAC/washington.html (all lower case except /VAAC/) . OUTLOOK: SEE SIGMETS. . THE NEXT MESSGE WILL BE ISSUED AROUND 23/0000Z. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN