FVXX21 KWBC 051000 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1000 UTC 05 DEC 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-207 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 FROM THE GEOPHYSICAL INSTITUTE AND NATIONAL WEATHER SERVICE MODEL DATA. . ERUPTION DETAILS: A BRIEF EMISSION OF ASH WAS NOTED IN MULTISPECTRAL IMAGERY AT AROUND 0700 UTC. . DETAILS OF ASH: ASH WAS OBSERVING MOVING TOWARD THE WEST-SOUTHWEST AT ABOUT 15 KNOTS. HEIGHT WAS ESTIMATED AT FL240. TRAJECTORY: ANY REMAINING ASH AT FL240 WOULD MOVE TOWARD THE SOUTHWEST 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. . 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 05/1600 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . . NNNN