FVXX21 KWBC 041330 VOLCANIC ASH ADVISORY ISSUED 1330 UTC 04 AUG 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-910 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. GEOPHYSICAL INSTITUTE. . ERUPTION DETAILS: NEARLY CONTINUOUS GASES AND OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: DUE TO CLOUD COVER NO ASH IS SEEN IN SATELLITE IMAGERY THROUGH 04/1245 UTC. THE GEOPHYSICAL INSTITUTE REPORTS THAT THERE IS CONTINUED SEISMIC ACTIVITY THAT WOULD INDICATED GAS AND ASH EMISSIONS HOWEVER GROUND OBSERVATIONS WERE NOT POSSIBLE DUE TO CLOUD COVER. . TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL300 WILL MOVE TOWARD THE WEST AROUND 20 TO 25 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 04/1930 UTC. . REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC ASH ADVISORIES 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