FVXX21 KWBC 071000 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1000 UTC 07 DEC 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-216 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. U.S. NATIONAL WEATHER SERVICE MODEL DATA. . ERUPTION DETAILS: CONTINUOUS EMISSION OF ASH AND STEAM. . DETAILS OF ASH: NO ASH CAN BE SEEN IN SATELLITE IMAGERY THOUGH 0915 UTC ALTHOUGH THERE IS EXTENSIVE CLOUDINESS ON THE AREA. ASH WAS LAST ESTIMATED AT FL200 LATE YESTERDAY. . TRAJECTORY: ANY REMAINING ASH AT FL200 WOULD MOVE TOWARDS THE NORTHWEST AT 10 KT. . 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 07/1600 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN