FVXX21 KWBC 050400 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0400 UTC 05 DEC 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-206 ECUADOR 1.47S 78.44W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE..MULTISPECTRAL AND INFRARED IMAGERY. UPPER AIR DATA FROM THE GEOPHYSICAL INSTITUTE. . ERUPTION DETAILS: VISIBLE ASH PLUME WAS DETECTED AT 2015 UTC 04 DECEMBER ESTIMATED AT FL240. . DETAILS OF ASH: ASH IS NO LONGER VISIBLE IN SATELLITE IMAGERY ALTHOUGH THERE IS EXTENSIVE METEOROLOGICAL CLOUDS IN THE AREA. . TRAJECTORY: ANY REMAINING ASH AT FL240 WOULD MOVE TOWARD THE SOUTHWEST AT 10 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. . 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 05/1000 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . . NNNN