FVXX21 KWBC 250730 VOLCANIC ASH ADVISORY STATEMENT ISSUED 0730 UTC 25 JAN 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-099 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY...GUAYAQUIL METEOROLOGICAL WATCH OFFICE SIGMET...JANUARY 24 REPORT FROM THE GEOPHYSICAL INSTITUTE...00 UTC AVIATION MODEL WIND FORECAST . ERUPTION DETAILS: OCCASIONAL EMISSIONS OF ASH AND STEAM. . DETAILS OF ASH: NO ASH CAN BE SEEN IN SATELLITE IMAGERY THROUGH 25/0645 UTC POSSIBLY BECAUSE OF THE LOW AND MID LEVEL WEATHER CLOUDS IN THE AREA. IN A REPORT ISSUED ON THE AFTERNOON OF JANUARY 24 THE GEOPHYSICAL INSTITUTE NOTED THE PRESENCE OF A COLUMN OF MOSTLY STEAM WITH SOME ASH. THE STEAM AND ASH WERE UP TO FL200 AND MOVED TOWARDS THE WEST AND SOUTHWEST. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ASH AT ABOUT FL200 WOULD MOVE AT ABOUT 10 KNOTS TOWARDS THE SOUTH. SLIGHTLY HIGHER ASH WOULD MOVE TOWARDS THE SOUTHWEST OR WEST. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 25/1330 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. . NNNN