FVXX21 KWBC 070430 VOLCANIC ASH ADVISORY STATEMENT ISSUED 0430 UTC 07 JAN 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-028 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. 1200 UTC AVIATION MODEL WIND FORECAST. GEOPHYSICAL INSTITUTE IN QUITO . ERUPTION DETAILS: CONTINUOUS ASH AND STEAM EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 0415 UTC DOES NOT SHOW ANY ASH ALTHOUGH HIGH CLOUDS HAVE OBSCURED THE SUMMIT AND THE IMMEDIATE SURROUNDINGS. ASH HEIGHT HAS BEEN DIFFICULT TO DETERMINE. OBSERVERS FROM THE GEOPHYSICAL INSTITUTE HAD REPORTED ASH TOPS ABOVE FL300 EARLY THIS MORNING HOWEVER FORECAST WIND DATA FROM THE 1200 UTC AVIATION MODEL SUGGESTED THAT THE ASH OBSERVED EARLIER IN THE DAY WAS AT FL200. . TRAJECTORY: TOWARDS THE SOUTHEAST AT 10 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 AND VAFTAD. . THE NEXT STATEMENT WILL BE ISSUED BY 07/1030 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . . NNNN