FVXX21 KWBC 222000 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 2000 UTC 22 OCTOBER 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-018 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...U.S. NATIONAL WEATHER SERVICE NUMERICAL WEATHER PREDICTION MODELS . ERUPTION DETAILS: CONTINUOUS VENTING OF ASH AND STEAM . DETAILS OF ASH: THE GEOPHYSICAL INSTITUTE REPORTS VENTING OF ASH AND GASES. SEISMIC ACTIVITY CONTINUES AT HIGH LEVELS. GOES-8 VISIBLE SATELLITE IMAGERY AT 1845 UTC SHOWED AN INCREASE IN CLOUDS IN THE VICINITY OF THE VOLCANO WHICH MADE IT IMPOSSIBLE TO DETECT ANY ASH. THE QUAYAQUIL MWO REPORTED ASH AT FL210/220. . TRAJECTORY: NUMERICAL MODEL FORECASTS SUGGEST THAT ANY ASH BETWEEN FL180 AND FL250 WOULD MOVE TOWARD THE WEST AT 8-12 KT. . 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 AROUND 23/0200 UTC. . BROWN/SAB/NOAA/NESDIS . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN