FVXX21 KWBC 090430 VOLCANIC ASH ADVISORY STATEMENT ISSUED 0430 UTC 10 JAN 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-040 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. REPORTS FROM THE GEOPHYSICAL INSTITUTE...UPPER-AIR SOUNDING DATA...1200 UTC AVIATION MODEL FORECAST DATA... . ERUPTION DETAILS: INTERMITTENT ASH AND STEAM EMISSIONS... . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 10/0245 UTC DOES NOT INDICATE ANY ASH OR STEAM. IMAGERY IS LIMITED DUE TO RAPID SCAN OPERATIONS. HOWEVER THE GEOPHYSICAL INSTITUTE CONTINUES TO REPORT STRONG SEISMIC ACTIVITY AND INDICATES OCCASIONAL EMISSIONS OF ASH AND STEAM LEAVING THE SUMMIT. THE ASH PLUME NOTED EARLIER IN THE DAY TO FL250 IS NO LONGER DETECTABLE.. . TRAJECTORY: ANY ASH OR STEAM FROM THE SUMMIT TO FL250 IS EXPECTED TO MOVE TO THE NORTH-NORTHWEST AT 10 TO 15 KNOTS. . 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/) . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 10/1030 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN