FVXX21 KNES 251908 VOLCANIC ASH ADVISORY ISSUED: 20070425/1908Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128 W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2007/253 INFORMATION SOURCE: GOES-12. GFS WINDS. GEOPHYSICAL INST. PILOT REPORT. ERUPTION DETAILS: ONGOING EMISSIONS. OBS ASH DATE/TIME: 25/1845Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL260 MOVING TO W 15-20 KNOTS. FCST ASH CLOUD +6H: 26/0100Z FCST ASH CLOUD +12H: 26/0700Z FCST ASH CLOUD +18H: 26/1300Z REMARKS: SINCE THE PREVIOUS ADVISORY, TWO REPORTS OF ASH HAVE BEEN RECEIVED. A PILOT AT 25/1355Z REPORTED ASH TO FL260 AND THE INSTITUTE REPORTED ASH TO FL200 AT 25/1410Z. BOTH REPORTED ASH MOVING TO THE WEST. VISIBLE AND MULTISPECTRAL IMAGERY HAS NOT SEEN EVIDENCE OF ANY ASH, PARTIALLY DUE TO AN ABUNDANCE OF WEATHER CLOUDS IN THE REGION. MODEL WINDS SUGGEST THAT ANY ASH SHOULD CONTINUE TO MOVE WESTSOUTHWEST THROUGH THE NEXT 12-18 HOURS. ...BALDWIN NEXT ADVISORY: WILL BE ISSUED BY 20070426/0115Z