FVXX21 KWBC 282000 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 2000 UTC 28 OCTOBER 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-042 ECUADOR 1.47S 78.44W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE AND INFRARED AND MULTISPECTRAL IMAGERY NATIONAL WEATHER SERVICE NUMERICAL WEATHER MODEL DATA. . ERUPTION DETAILS: OCCASIONAL VENTING OF ASH AND STEAM. . DETAILS OF ASH: GOES-8 SATELLITE IMAGERY THROUGH 28/1915 UTC SHOWS DENSE METEOROLOGICAL CLOUDS OVER THE AREA OF THE VOLCANO. THEREFORE IT IS DIFFICULT TO DETECT ANY VOLCANIC ASH. A 1900 UTC SURFACE OBSERVATION REPORTED VOLCANIC ASH IN THE VICINITY OF THE VOLCANO TO FL220. . TRAJECTORY: MODEL DATA INDICATES THAT ASH BETWEEN FL190 AND FL250 WOULD MOVE TOWARD THE SOUTHWEST BETWEEN 10 AND 20 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. . THE NEXT STATEMENT WILL BE ISSUED AROUND 29/0200 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . KARST . NNNN