FVXX21 KWBC 101230 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1230 UTC 10 DEC 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-229 ECUADOR 1.47S 78.44W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 MULTISPECTRAL AND INFRARED IMAGERY...UPPER AIR DATA AND REPORTS FROM THE GEOPHYSICAL INSTITUTE... . ERUPTION DETAILS: CONTINUOUS EMISSION OF ASH AND STEAM WITH OCCASIONAL LARGER PUFFS . DETAILS OF ASH: MINOR PUFFS HAVE BEEN OBSERVED IN MULTISPECTRAL SATELLITE IMAGERY AT ABOUT 0830 UTC AND 1000 UTC MOVING TO THE SOUTHWEST AT 15 KNOTS AND DISSIPATING. THE GEOPHYSICAL INSTITUTE REPORTED YESTERDAY THAT ASH REACHED FL310. TRAJECTORY: SOUTHWEST AT 15 TO 20 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 10/1830 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . . NNNN