FVXX20 KWBC 101755 . VOLCANIC ASH ADVISORY STATEMENT CORR ISSUED 1745 UTC 10 DEC 1999 BY THE WASHINGTON VAAC . GUAGUA PICHINCHA 99-145 ECUADOR 0.17S 78.60W . BACKGROUND: GUAGUA PICHINCHA ECUADOR (1502-02) SUMMIT HEIGHT 15695 FT (4784 M) . SOURCES OF INFORMATION: THE GEOPHYSICAL INSTITUTE IN ECUADOR. GOES-8 VISIBLE..INFRARED AND MULTISPECTRAL IMAGERY. U.S. NUMERICAL MODEL WIND FORECAST. . ERUPTION DETAILS: ERUPTION AT 10/1556 UTC. . DETAILS OF ASH CLOUD: THE GEOPHYSICAL INSTITUTE IN ECUADOR REPORTS AN ERUPTION WITH ASH ESTIMATED TO FL180/220. THE LATEST MULTISPECTRAL IMAGERY AT 1715 UCT SHOWS A PLUME OF ASH EXTENDING TOWARD THE SOUTHWEST. . TRAJECTORY: UPPER AIR WINDS SUGGEST ASH WOULD MOVE TOWARD THE SOUTHWEST AT 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. . BROWN/NOAA/NESDIS/SAB . 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 AROUND 10/2345. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN