FVXX21 KWBC 191500 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1500 UTC 19 DEC 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-267 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...19/1200 UTC AVIATION MODEL WIND FORECAST... . ERUPTION DETAILS: OCCASIONAL EMISSIONS OF ASH AND STEAM... . DETAILS OF ASH: THE GOES-8 IMAGERY THRU 19/1415 UTC INDICATES OCCASIONAL SMALL PUFFS OF STEAM AND OR ASH BEING PRODUCED BY THE VOLCANO. EXACT LOCATION OF INDIVIDUAL PUFFS IS DIFFICULT TO DISCERN DUE TO EXTENSIVE METEOROLOGICAL CLOUDS IN THE AREA. MOVEMENT IS TOWARD THE WEST-SOUTHWEST AT ABOUT 15 KNOTS. UPPER AIR MODEL DATA WOULD PLACE THE ASH AT APPROXIMATELY FL180. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ASH AT FL180 WOULD MOVE TO THE WEST-SOUTHWEST AT ABOUT 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 19/2100 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . SCHWARTZ/NOAA/NESDIS/SAB . NNNN