FVXX20 KWBC 022330 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 2330 UTC 02 DEC 1999 BY THE WASHINGTON VAAC . GUAGUA PICHINCHA 99-134 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...SURFACE REPORTS FROM QUITO . ERUPTION DETAILS: ERUPTION AT 02/2230 UTC . DETAILS OF ASH CLOUD: THE GEOFISICO INSTITUTO IN ECUADOR REPORTS A MODERATE ERUPTION WITH SEVERAL PULSES OCCURRED AROUND 02/2230 UTC. THEY COULD NOT GIVE ANY FURTHER INFORMATION REGARDING DIRECTION OF ASH PLUME OR HEIGHT DUE TO RAIN FALLING IN THE AREA OBSCURING THEIR OBSERVATION. SATELLITE IMAGERY IS ONLY AVAILABLE THROUGH 2245 UTC AND ONLY INDICATES A POSSIBLE SINGLE POINT OF ASH NEAR THE SUMMIT OF THE VOLCANO. NO HEIGHT OR DIRECTION OF MOVEMENT CAN BE ASCERTAINED FROM THIS IMAGERY. . 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 AND VAFTAD . ....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 AT 03/0530 UTC UNLESS ADDITIONAL INFORMATION BECOMES AVAILABLE OR THE ERUPTION BECOMES VISIBLE IN SATELLITE IMAGERY. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN