FVXX21 KWBC 021700 VOLCANIC ASH ADVISORY STATEMENT ISSUED 1700 UTC 02 FEB 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-135 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL SATELLITE IMAGERY...12 UTC AVIATION MODEL WIND FORECAST. GEOPHYSICAL INSTITUTE QUITO . ERUPTION DETAILS: INTERMITTENT ERUPTIONS. . DETAILS OF ASH: NO ASH CAN BE SEEN IN SATELLITE IMAGERY THROUGH 02/1615 UTC DUE TO DENSE CLOUD COVER COVERING MOST OF ECUADOR. HOWEVER THE GEOPHYSICAL INSTITUTE REPORTED ASH OVER THE VOLCANO AT 1445 UTC. THE ASH WAS ESTIMATED BY THE INSTITUTE AT FL180 MOVING WEST. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH BETWEEN THE SUMMIT AND FL230 WOULD MOVE TOWARD THE WEST AT ABOUT 20-25 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . NEXT MESSAGE WILL BE ISSUED BY 02/2300 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. . CLARK . NNNN