FVXX21 KWBC 271130 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1130 UTC 27 DEC 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-300 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...WIND DATA PROVIDED BY THE OBSERVATORY IN QUITO...00Z AVIATION MODEL 12 HOUR FORECAST. . ERUPTION DETAILS: EMISSIONS OF ASH AND STEAM . DETAILS OF ASH: NO ASH CAN CURRENTLY BE DETECTED IN SATELLITE IMAGERY THROUGH 27/1045 UTC. THE VOLCANO IS OBSCURED BY BROKEN MIDDLE LEVEL AND SCATTERED HIGH LEVEL CLOUDS. . TRAJECTORY: ANY ASH BETWEEN FL250 AND FL340 WOULD MOVE NORTH NORTHWEST AT 10 TO 25 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 27/1730 UTC OR SOONER IF ADDITIONAL DATA BECOMES AVAILABLE. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN