FVXX21 KWBC 172045 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 2045 UTC 17 OCTOBER 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-002 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...THE GEOPHYSICAL INSTITUTE IN ECUADOR AND SURFACE OBSERVATIONS. . ERUPTION DETAILS: A SMALL ERUPTION BEGAN AT 17/1030 UTC DETECTED IN GOES IMAGERY. . DETAILS OF ASH: GOES 8 IMAGERY NO LONGER DETECTS ANY ASH AND THERE ARE NOW SCATTERED METEOROLOGICAL CLOUDS IN THE REGION. THE INSTITUTE REPORTS THAT THE EMISSIONS AT THE VOLCANO HAVE DECREASE SINCE THIS MORNING AND THE CURRENT ESTIMATED HEIGHT OF THE LIGHT PLUME OF GASES WITH A LITTLE ASH IS AROUND FL180 AND MOVING OFF TO THE WEST AROUND 20 TO 25 NMI. BECAUSE OF THE CURRENT UNSTABLE CONDITIONS...THE VOLCANO IS NOW IN A WATCH STATUS AND WILL CONTINUE TO BE MONITORED. . TRAJECTORY: ANY ASH BELOW FL200 WILL MOVE WEST TO NORTHWEST AROUND 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 www.ssd.noaa.gov/VAAC/washington.html (all lower case except /VAAC/) . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE A WATCH VAAS ISSUED AROUND 18/2045 UTC. UNLESS CONDITIONS CHANGE AND ASH IS AGAIN REPORTED. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN