FVXX20 KWBC 090555 VOLCANIC ASH ADVISORY STATEMENT ISSUED 0555 UTC 09 APR 2000 BY THE WASHINGTON VAAC . GUAGUA PICHINCHA 00-117 ECUADOR 0011S 7836W . BACKGROUND: GUAGUA PICHINCHA ECUADOR (1502-02) SUMMIT HEIGHT 15695 FT (4784 M) . SOURCES OF INFORMATION: 6 HOUR FORECAST FROM THE 09/0000 UTC AVN MODEL. THE GEOPHYSICAL INSTITUTE IN QUITO. . ERUPTION DETAILS: EXPLOSIVE ERUPTION AT 0504 UTC. . DETAILS OF ASH CLOUD: GOES-8 IMAGERY IS UNAVAILABLE UNTIL 0645 UTC DUE TO ECLIPSE. THE INSTITUTE REPORTS THAT GUAGUA HAS HAD AN EXPLOSIVE ERUPTION BUT COULD NOT PROVIDE ANY OBSERVED DATA. ANOTHER MESSAGE WILL BE ISSUED AS SOON AS ADDITIONAL INFORMATION BECOMES AVAILABLE. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH UP TO FL250 WOULD MOVE WEST SOUTHWEST AT 15 TO 20 KNOTS. ASH AT FL300 WOULD MOVE SOUTH AT ABOUT 15 KNOTS. . OUTLOOK: SEE SIGMETS . THE NEXT STATEMENT WILL BE ISSUED ABOUT 09/0830 UTC. . 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/) . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN