FVXX21 KWBC 051500 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1500 UTC 05 DEC 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-208 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. U.S. NATIONAL WEATHER SERVICE MODEL DATA. . ERUPTION DETAILS: NEW BRIEF EMISSION OF ASH WAS NOTED IN IMAGERY AT 05/1345 UTC. . DETAILS OF ASH: A VERY SMALL PUFF WAS NOTICED ON THE 05/1345 UTC IMAGE AND BY 05/1415 UTC IT HAD MOVED TOWARD THE SOUTH-SOUTHWEST APPROXIMATELY 24KM. CURRENTLY AT 05/1415 THIS SMALL AREA OF ASH IS CENTERED NEAR 1.6S 78.6W. BASED ON THE 05/0600 UTC AVIATION MODEL UPPER AIR FORECAST VALID 05/1200 UTC THE PLUME IS BELIEVED TO BE AT FL350. TRAJECTORY: ASH AT FL350 WOULD MOVE TOWARD THE SOUTH-SOUTHWEST AT 10KT. . 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 05/2000 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . WALTER/RUMINSKI/SAB/NOAA/NESDIS . NNNN