FVXX21 KWBC 111435 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1435 UTC 11 DEC 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-234 ECUADOR 1.47S 78.44W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE AND MULTISPECTRAL IMAGERY...U.S. NUMERICAL MODEL WIND FORECASTS . ERUPTION DETAILS: CONTINUOUS EMISSION OF ASH AND STEAM WITH OCCASIONAL LARGER PUFFS . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 1345 UTC SHOWS CONVECTIVE DEBRIS FROM WEAKENING THUNDERSTORMS OVER TUNGURAHUA. WE ARE UNABLE TO DETECT ANY ASH. . TRAJECTORY: ANY ASH UP TO FL250 WOULD MOVE TOWARDS THE WEST AT 10 TO 15 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 BY 11/2030 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . TURK . NNNN