FVXX20 KWBC 030325 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0325 UTC 03 DEC 1999 BY THE WASHINGTON VAAC . GUAGUA PICHINCHA 99-135 ECUADOR 0.17S 78.60W . BACKGROUND: GUAGUA PICHINCHA ECUADOR (1502-02) SUMMIT HEIGHT 15695 FT (4784 M) . SOURCES OF INFORMATION: THE GEOFISICO INSTITUTO IN ECUADOR...GOES-8 INFRARED AND MULTISPECTRAL IMAGERY...UPPER LEVEL WINDS FORECAST FROM AVIATION MODEL. . ERUPTION DETAILS: ERUPTION ABOUT 03/0300 UTC . DETAILS OF ASH CLOUD: THE GEOFISICO INSTITUTO IN ECUADOR REPORTS AN ADDITIONAL ERUPTION HAS OCCURRED AROUND 03/0330 UTC. THIS ERUPTION IS SEISMOLOGICALLY LARGER THAN THE ONE AT 02/2230 UTC AND HAS PRODUCED BOTH A VERTICAL ASH PLUME AND A PYROCLASTIC FLOE AWAY FROM THE VOLCANO. ALTHOUGH WAS DIFFICULT TO SEE THE DIRECTION OR HEIGHT OF THE ASH PLUME DUE TO CLOUDS AND RAIN THE GEOFISICO INSTITUTO SUSPECTS THE PLUME IS MOVING WEST. SATELLITE IMAGERY THROUGH 0245 UTC DOES SHOW AN AREA OF ASH IN THE IMMEDIATE VICINITY OF THE VOLCANO AND TO WITHIN 14 KM (8 NMI) TO THE WEST AND SOUTH. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH BETWEEN FL100 AND FL200 WOULD MOVE IN A SOUTHWARD AT ABOUT 4 KNOTS. ANY ASH BETWEEN FL200 AND FL300 WOULD MOVE WEST TO NORTHWEST AT 5 TO 10 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 . ....EFFECTIVE JANUARY 3 2000 AT 0000 UTC... ALL REFERENCES TO LATITUDE AND LONGITUDE IN VOLCANIC ASH ADVISORY STATEMENTS WILL BE IN DEGREES AND MINUTES OF A DEGREE. EXAMPLE... 16.70N 62.20W WILL BE 1642N6212W . THE NEXT STATEMENT WILL BE ISSUED AS SOON AS ADDITIONAL IMAGERY IS AVAILABLE FOR DETERMINATION OF HEIGHT AND DIRECTION. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN