FVXX21 KWBC 102035 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 2035 UTC 10 DEC 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-231 ECUADOR 1.47S 78.44W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 MULTISPECTRAL AND VISIBLE 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: GOES-8 MULTISPECTRAL IMAGERY AT 1945 UTC SHOWS A HOT SPOT OVER TUNGURAHUA. ASH ESTIMATED BELOW FL180 IS MOVING WESTWARD. . TRAJECTORY: WESTWARD 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 11/0230 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . . NNNN