FVXX21 KWBC 180100 VOLCANIC ASH ADVISORY STATEMENT ISSUED 0100 UTC 18 MAY 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-581 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY. WIND FORECAST FROM THE AVIATION MODEL. GUAYAQUIL METEOROLOGICAL WATCH OFFICE SIGMET. . ERUPTION DETAILS: NEARLY CONTINUOUS GAS AND OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: THE LAST REPORT FROM THE THE GUAYAQUIL MWO INDICATES THAT VOLCANIC ASH IS REPORTED BY THE GEOPHYSICAL INSTITUTE TO AROUND FL250 AND MOVING WEST. NO ASH CAN BE DETECTED IN SATELLITE IMAGERY THROUGH 18/0015 UTC DUE TO THE EXTENSIVE WEATHER CLOUDS IN THE AREA. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH AROUND FL250 WOULD MOVE TOWARD THE WEST AROUND 20 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT STATEMENT WILL BE ISSUED BY 18/0700 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