FVXX20 KWBC 062000 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 2000 UTC 06 OCTOBER 1999 BY THE WASHINGTON VAAC . GUAGUA PICHINCHA 99-031 ECUADOR 0.17S 78.60W . BACKGROUND: GUAGUA PICHINCHA (1502-02) SUMMIT HEIGHT 15,695FT (4784 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY THROUGH 1915 UTC...QUITO SURFACE OBSERVATIONS...VAFTAD AND AN EXPERIMENTAL ASH TRAJECTORY MODEL. . ERUPTION DETAILS: ERUPTION OCCURRED AROUND 05/1915 UTC. DETAILS OF ASH CLOUD: SURFACE REPORTS FROM QUITO MENTION VOLCANIC ASH IN THE REMARKS SECTION FROM 1800 UTC THRU 1900 UTC BUT THIS IS PROBABLY THE WIND STIRRING UP VOLCANIC ASH IN THE IMMEDIATE VICINITY OF THE GROUND FROM THE ERUPTION YESTERDAY. VISIBLE INFRARED AND MULTISPECTRAL SATELLITE IMAGERY DOES NOT INDICATE ANY ASH REMAINING ALOFT IN THE AREA AROUND THE VOLCANO. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY POSSIBLE REMAINING ASH AT ABOUT FL380 WILL MOVE TOWARD THE WEST OR SOUTHWESTWARD AT ABOUT 20 KNOTS WHILE ASH BETWEEN FL380 AND FL550 WOULD MOVE EASTWARD AT 20 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 www.ssd.noaa.gov/VAAC/washington.html (all lower case except /VAAC/) . OUTLOOK: SEE SIGMETS AND VAFTAD. . THIS WILL BE THE LAST STATEMENT FOR THIS ERUPTION. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN