FVXX21 KWBC 302000 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 2000 UTC 30 OCTOBER 1999 BY THE WASHINGTON VAAC . TUNGURAHUA 99-050 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... NATIONAL WEATHER SERVICE NUMERICAL WEATHER MODEL DATA. . ERUPTION DETAILS: OCCASIONAL VENTING OF ASH AND STEAM. . DETAILS OF ASH: GOES-8 SATELLITE IMAGERY THROUGH 30/1915 UTC SHOWS SCATTERED SHOWERS AND THUNDERSTORMS IN THE VICINITY OF THE VOLCANO SITE. THERE IS NO ASH VISIBLE AT THIS TIME. IT WOULD APPEAR THAT THE LEVEL OF ACTIVITY HAS DECREASED THROUGHOUT THE DAY BUT CAUTION IS STRONGLY SUGGESTED. THE VOLCANO HAS BEEN VERY ACTIVE OVER THE LAST COUPLE OF WEEKS AND MAY ERUPT AGAIN WITH LITTLE OR NO WARNING AS THE GEOPHYSICAL INSTITUTE HAS INDICATED. IF THE TREND TO LESS ACTIVITY CONTINUES THEN WE WILL DOWNGRADE TUNGURAHUA TO A WATCH-VAAS STATUS ONLY. . TRAJECTORY: N/A. . 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 BY 31/0200 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . ORRISON . NNNN