FVXX21 KWBC 212000 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 2000 UTC 21 OCTOBER 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-014 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 THROUGH 1915 UTC... GEOPHYSICAL INSTITUTE ...U.S. NATIONAL WEATHER SERVICE NUMERICAL WEATHER PREDICTION MODELS . ERUPTION DETAILS: CONTINUOUS ERUPTION OF ASH AND STEAM TO FL180-200 . DETAILS OF ASH: THE GEOPHYSICAL INSTITUTE REPORTS THAT LOCAL AIRCRAFT ARE SEEING A CONTINUOUS EMISSION OF ASH AND STEAM FROM TUNGURAHUA TO BETWEEN FL180 AND FL200 IN A MOSTLY WESTERLY DIRECTION FROM THE VOLCANO. GOES-8 IMAGERY THROUGH 1915 UTC DOES NOT SHOW ANY DEFINITE ASH SIGNATURES ALTHOUGH THERE IS EXTENSIVE METEOROLOGICAL CLOUDS IN THE AREA.. . TRAJECTORY: NUMERICAL MODEL FORECASTS SUGGEST THAT ANY ASH AT FL180-200 WOULD MOVE TOWARD THE WEST TO WEST-SOUTHWEST AT 10-15KT. . 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. . THE NEXT MESSAGE WILL BE ISSUED BY 22/0400 UTC. . SCHWARTZ/SAB/NOAA/NESDIS . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN