FVXX21 KWBC 220900 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0900 UTC 22 DEC 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-278 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. GEOPHYSICAL INSTITUTE REPORT AND AVIATION MODEL WIND DATA. . ERUPTION DETAILS: ALMOST CONTINUAL STEAM EMISSIONS WITH OCCASIONAL PULSES OF ASH. . DETAILS OF ASH: THERE ARE SCATTERED MULTI-LAYERED CLOUDS OVER THE REGION MAKING DETECTION OF ANY ASH DIFFICULT IN NIGHT TIME IMAGERY. NO ASH WAS DETECTED ON CURRENT SATELLITE IMAGERY THROUGH 22/0815 UTC. . TRAJECTORY: ANY ASH BELOW FL250 WOULD MOVE TOWARD THE WEST TO SOUTHWEST AT 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 22/1500 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN