FVXX21 KWBC 160430 VOLCANIC ASH ADVISORY STATEMENT ISSUED 0430 UTC 16 JAN 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-061 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. UPPER AIR DATA AND REPORTS FROM THE GEOPHYSICAL INSTITUTE... . ERUPTION DETAILS: FREQUENT EMISSIONS OF ASH AND STEAM WITH OCCASIONAL EXPLOSIONS. . DETAILS OF ASH: THE LATEST INFRARED AND MULTISPECTRAL SATELLITE IMAGES THROUGH 16/0315 UTC DO NOT SHOW ANY DEFINABLE AREAS OF ASH OR STEAM. HOWEVER THE REGION HAS BEEN SEEING AN INCREASE IN SHOWER ACTIVITY AND SO THERE ARE A NUMBER OF MULTILAYERED CLOUD DECKS COMPLICATING THE DETECTION PROCESS. . THERE WAS A SIGNIFICANT AMOUNT OF ASH AND STEAM SEEN THROUGHOUT THE DAY AND A PORTION OF IT NOTED 6 HOURS AGO IS NOW BELIEVED TO HAVE BECOME EMBEDDED WITHIN THE VARIOUS CLOUD DECKS. ASH IS STILL ESTIMATED TO BE AS HIGH AS FL250. . TRAJECTORY: ASH AND STEAM TO FL250 SHOULD MOVE NORTH-NORTHWEST AT ABOUT 10 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 16/1030 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