FVXX21 KWBC 310830 VOLCANIC ASH ADVISORY STATEMENT ISSUED 0830 UTC 31 MAR 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-381 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. UPPER WIND FORECAST FROM THE AVN MODEL. . ERUPTION DETAILS: CONTINUOUS GAS EMISSION WITH OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: GOES-8 IMAGERY THROUGH 0745 UTC SHOWS CLOUDS OBSCURING THE VOLCANO. UNTIL 0345 UTC A HOT SPOT WAS OBSERVED AT THE SUMMIT HOWEVER CLOUDS ARE TO NOW TO THICK FOR FURTHER DETECTION. MULTISPECTRAL IMAGERY DOES NOT INDICATE ASH ABOVE THE CLOUD COVER. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH UP TO FL300 WILL MOVE WEST AROUND 10 TO 15 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 31/1430 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