FVXX20 KWBC 100100 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0100 UTC 10 NOV 1999 BY THE WASHINGTON VAAC . GUAGUA PICHINCHA 99-076 ECUADOR 0.17S 78.60W . BACKGROUND: GUAGUA PICHINCHA ECUADOR (1502-02) SUMMIT HEIGHT 15695 FT (4784 M) . SOURCES OF INFORMATION: GEOPHYSICAL INSTITUTE IN QUITO...INFRARED AND MULTISPECTRAL GOES-8 SATELLITE IMAGERY. AVN FORECAST UPPER AIR SOUNDING. . ERUPTION DETAILS: REPORTED EXPLOSIVE ERUPTION AT 10/0027 UTC. . DETAILS OF ASH CLOUD: SATELLITE IMAGERY IS ONLY AVAILABLE THROUGH 10/0015 UTC. NO PLUME IS YET VISIBLE. THE GEOPHYSICAL INSTITUTE CANNOT CONFIRM THAT THIS ERUPTION HAS PRODUCED AN ASH PLUME. . TRAJECTORY: IF PRESSENT ... ASH BETWEEN FL050 AND FL190 WOULD MOVE WEST AT UP TO 15 KNOTS. BETWEEN FL190 AND FL250 ASH WOULD MOVE SOUTH AT ABOUT 5 KNOTS. FROM FL250 TO FL340 ASH WOULD MOVE EAST NORTHEAST AT ABOUT 15 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 . THE NEXT STATEMENT WILL BE ISSUED AS SOON AS POSSIBLE BUT NO LATER THAN 10/0700 UTC. . . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN