FVXX21 KWBC 262335 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 2335 UTC 26 DEC 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-298 ECUADOR 1.47S 78.44W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY...WIND DATA PROVIDED BY THE OBSERVATORY IN QUITO . ERUPTION DETAILS: EMISSIONS OF ASH AND STEAM . DETAILS OF ASH: NO ASH WAS DETECTED IN SATELLITE IMAGERY THROUGH 26/2245 UTC. HOWEVER..SURFACE OBSERVATIONS AS RECENTLY AS 2100 UTC INDICATED VOLCANIC ASH IN THE VICINITY OF THE VOLCANO MOVING TOWARD THE NORTH. THE DIRECTION OF MOTION OF THE ASH IMPLIES A HEIGHT OF APPROXIMATELY FL340 BASED ON 1200 UTC WIND DATA PROVIDED BY THE OBSERVATORY IN QUITO. . TRAJECTORY: TOWARDS THE NORTH AT 35 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 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 27/0530 UTC OR SOONER IF ADDITIONAL DATA BECOMES AVAILABLE. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . TURK/SAB/NOAA/NESDIS . NNNN