FVXX21 KWBC 220640 VOLCANIC ASH ADVISORY STATEMENT ISSUED 0640 UTC 22 MAY 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-598 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY...GEOPHYSICAL INSTITUTE REPORT AND 0000 UTC AVIATION MODEL FORECAST DATA. . ERUPTION DETAILS: NEARLY CONTINUOUS GAS AND ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 22/0545 UTC SHOWS EXTENSIVE CLOUDINESS LEFTOVER FROM EARLIER SHOWER AND THUNDERSTORM ACTIVITY. NO ASH CAN BE DETECTED AT THIS TIME HOWEVER THE GEOPHYSICAL INSTITUTE REPORTED POSSIBLE ASH OVER THE VOLCANO AT 0440 UTC. IT IS VERY DIFFICULT TO ASCERTAIN THE CURRENT HEIGHT OF ASH BUT THE LAST REPORTED HEIGHT OF ACTIVITY WAS FL280 OVER 24 HOURS AGO. . TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL280 SHOULD MOVE TO THE WEST SOUTHWEST AT 15 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 22/1300 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. . ORRISON . NNNN