FVXX21 KWBC 290700 VOLCANIC ASH ADVISORY STATEMENT ISSUED 0700 UTC 29 DEC 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-308 ECUADOR 1.47S 78.44W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. INSTITUTE GEOFISICO REPORT AND WIND DATA. . ERUPTION DETAILS: INTERMITTENT ASH AND STEAM EMISSIONS. . DETAILS OF ASH: SATELLITE DATA THRU 29/0615 UTC DOES NOT INDICATE ANY ASH OR STEAM IN THE VICINITY OF THE SUMMIT. THE LATEST SURFACE REPORT AT 29/0600 UTC NO LONGER MENTIONS VOLCANIC ASH OVER THE VOLCANO. . TRAJECTORY: ANY ASH BELOW FL240 WILL MOVE TOWARDS THE SOUTH TO SOUTH SOUTHWEST AROUND 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 29/1300 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN