FVXX21 KNES 271738 VOLCANIC ASH ADVISORY ISSUED: 20070427/1735Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128 W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2007/261 INFORMATION SOURCE: GOES-12. GFS WINDS. SIGMET ERUPTION DETAILS: ONGOING EMISSIONS OBS ASH DATE/TIME: 27/1645Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/230 MOVING TO W 5-15 KNOTS. FCST ASH CLOUD +6H: 27/2300Z FCST ASH CLOUD +12H: 28/0500Z FCST ASH CLOUD +18H: 28/1100Z REMARKS: A SIGMET CITES A 1645Z GEOPHYSICAL INSTITUTE OBSERVATION OF ASH FL165/200 MOVING TOWARD THE WEST. NO ASH OR HOTSPOTS CAN BE SEEN IN SATELLITE IMAGERY BUT LOW LEVEL WEATHER CLOUDS ARE HINDERING ASH DETECTION. NEXT ADVISORY: WILL BE ISSUED BY 20070427/2330Z