FVXX21 KWBC 011130 VOLCANIC ASH ADVISORY STATEMENT ISSUED 1130 UTC 01 FEB 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-129 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: JANUARY 31 GEOPHYSICAL INSTITUTE REPORT...GOES-8 INFRARED AND MULTISPECTRAL SATELLITE IMAGERY...00 UTC AVIATION MODEL WIND FORECAST. . ERUPTION DETAILS: INTERMITTENT EXPLOSIONS PRODUCING STEAM AND ASH. . DETAILS OF ASH: NO ASH CAN BE SEEN IN SATELLITE IMAGERY THROUGH 1045 UTC. HOWEVER THE LOW LEVEL WEATHER CLOUDS COVERING MUCH OF ECUADOR COULD BE HINDERING ASH DETECTION. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH BETWEEN THE SUMMIT AND FL220 WOULD MOVE TOWARD THE WEST AT ABOUT 20 KNOTS. . OUTLOOK: SEE SIGMETS . THE NEXT STATEMENT WILL BE ISSUED BY 01/1730 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