FVXX21 KWBC 230730 VOLCANIC ASH ADVISORY ISSUED 0730 UTC 23 JUN 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-731 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. WIND FORECAST FROM AVIATION MODEL. GEOPHYSICAL INSTITUTE REPORT. . ERUPTION DETAILS: NEARLY CONTINUOUS GAS AND OCCASIONAL ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 23/0645 UTC SHOWS CLOUDS OVER THE AREA MAKING ASH DETECTION DIFFICULT. THE GEOPHYSICAL INSTITUTE LAST REPORTED ASH AT 23/0241 UTC. THIS ASH WAS REPORTED OVER THE VOLCANO NEAR SUMMIT LEVEL MOVING TO THE WEST. . TRAJECTORY: ANY ASH THAT MAY EXIST NEAR SUMMIT LEVEL WOULD MOVE TO THE WEST AT 15 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 23/1330 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. . CLARK . NNNN