FVXX21 KWBC 030500 VOLCANIC ASH ADVISORY STATEMENT ISSUED 0500 UTC 03 FEB 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-137 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 MULTISPECTRAL INFRARED AND SHORT WAVELENGTH INFRARED SATELLITE IMAGERY...WIND FORECAST FROM THE 1800 UTC AVIATION MODEL...FEBRUARY 2 REPORT FROM THE GEOPHYSICAL INSTITUTE IN QUITO . ERUPTION DETAILS: INTERMITTENT ERUPTIONS. . DETAILS OF ASH: NO ASH CAN BE SEEN IN SATELLITE IMAGERY THROUGH 0415 UTC PROBABLY BECAUSE OF THE EXTENSIVE WEATHER CLOUDS COVERING THE AREA. BEFORE NIGHTFALL ABOUT 6 HOURS AGO AN ASH PLUME AT ABOUT FL190 COULD BE SEEN IN VISIBLE SATELLITE IMAGERY EXTENDING FROM THE SUMMIT TOWARD THE WEST. THROUGH THE CLOUDS AN INTERMITTENT HOTSPOT CAN BE SEEN IN SHORTWAVE INFRARED SATELLITE IMAGERY. THE FEBRUARY 2 REPORT FROM THE GEOPHYSICAL INSTITUTE ALSO SUGGESTS INCREASED ACTIVITY AND ASH CONCENTRATIONS. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH BETWEEN THE SUMMIT AND FL200 WILL MOVE TOWARD THE WEST AT ABOUT 25 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . NEXT MESSAGE WILL BE ISSUED BY 03/1100 UTC. . 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/) . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN