FVXX21 KWBC 260200 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0200 UTC 26 OCTOBER 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-031 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..GEOPHYSICAL INSTITUTE AND UPPER AIR SOUNDING NEAR THE VOLCANO. . ERUPTION DETAILS: CONTINUOUS VENTING OF ASH AND STEAM. . DETAILS OF ASH: GOES-8 SATELLITE IMAGERY THROUGH 26/0115 UTC NO LONGER SHOWS ANY PLUME. THE LAST VISIBLE IMAGE OF THE DAY (25/2215 UTC) DID HAVE A THIN PLUME EXTENDING SOUTH SOUTHWEST OF THE VOLCANO. THE GUAYAQUIL MWO CONTINUES TO REPORT ASH FROM THE VOLCANO BETWEEN FL180 AND FL200. IN ADDITION..THE GEOPHYSICAL INSTITUTE REPORTS CONTINUOUS GAS EMISSIONS FROM THE VOLCANO. . TRAJECTORY: UPPER AIR DATA SUGGESTS ANY ASH BELOW FL200 WOULD MOVE TO THE SOUTHWEST AROUND 10 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 26/0800 UTC. . . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN