FVXX21 KWBC 261050 VOLCANIC ASH ADVISORY STATEMENT ISSUED 1050 UTC 26 FEB 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-241 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...1800 UTC AVIATION MODEL UPPER AIR SOUNDING DATA... . ERUPTION DETAILS: EXPLOSIVE ERUPTION AT 25/1630 UTC... . DETAILS OF ASH: SATELLITE IMAGERY ENDING AT 26/1015 UTC DOES NOT INDICATE ANY ASH OR STEAM. STRONG SHOWER AND THUNDERSTORM ACTIVITY EAST OF THE MOUNTAINS HAS LEFT AN EXTENSIVE AMOUNT OF CLOUDINESS ACROSS THE REGION AND THUS CONTINUES TO OBSCURE FULL VIEW OF THE SUMMIT. HOWEVER IT SHOULD BE NOTED THAT THE GEOPHYSICAL INSTITUTE REPORTED A LARGE AMOUNT OF SEISMIC ACTIVITY RECENTLY AND THE POTENTIAL EXISTS FOR AN ERUPTION AT ANY TIME. ASH WAS LAST REPORTED AT FL170 ABOUT 12 HOURS AGO. . TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL170 SHOULD MOVE TO THE WEST AND SOUTHWEST AT 10 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 26/1630 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