FVXX21 KWBC 261130 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1130 UTC 26 DEC 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-296 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... 0000 UTC AVIATION MODEL WIND FORECAST...WIND DATA PROVIDED BY THE OBSERVATORY IN QUITO . ERUPTION DETAILS: EMISSIONS OF ASH AND STEAM . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 1045 UTC NO LONGER SHOWS ANY ASH PLUME. MULTI-LAYERED CLOUDS HAVE MOVED OVER THE VOLCANO OVER THE PAST HOUR AND ARE OBSCURING ANY RECENT ACTIVITY. . TRAJECTORY: ANY ASH BETWEEN FL250 AND FL350 WOULD MOVE NORTH NORTHWEST AT 20-35 KTS . 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 26/1730 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN