FVXX20 KWBC 200815 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0815 UTC 20 FEB 1999 BY THE WASHINGTON VAAC . COLIMA 99-011 MEXICO 19.51N 103.62W . BACKGROUND: COLIMA MEXICO (1401-04) SUMMIT HEIGHT 13451 FT (4100 M) . SOURCES OF INFORMATION: GOES 8 INFRARED AND MULTISPECTRAL IMAGERY. SIGMET FROM MEXICO CITY METEOROLOGICAL WATCH OFFICE. SURFACE OBSERVATION FROM COLIMA . ERUPTION DETAILS: UNKNOWN . DETAILS OF ASH CLOUD: NO ASH CAN BE SEEN IN SATELLITE IMAGERY THROUGH 0745 UTC. HOWEVER MEXICO CITY METEOROLOGICAL WATCH OFFICE SIGMETS CONTINUE TO INDICATE VOLCANIC ASH POSSIBLY UP TO FL210. A SURFACE OBSERVATION FROM COLIMA ALSO REPORTED A VOLCANIC ASH LAYER. . TRAJECTORY: NATIONAL WEATHER SERVICE NUMERICAL MODEL WINDS SUGGEST THAT ANY ASH AT ABOUT FL210 WILL MOVE TOWARD THE SOUTH AT ABOUT 15 KNOTS. . THIS AND OTHER VOLCANIC ASH ADVISORY STATEMENTS OFTEN ACCOMPANIED BY A MAP DEPICTING ASH LOCATION ARE AVAILABLE AT INTERNET URL ADDRESS www.ssd.noaa.gov/VAAC/messages.html (all lower case except /VAAC/) . OUTLOOK: SEE SIGMETS . THE NEXT MESSAGE WILL BE ISSUED BY 20/1400 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN