FVXX20 KNES 171240 VOLCANIC ASH ADVISORY ISSUED: 2005MAY17/1239Z VAAC: WASHINGTON VOLCANO: ANATAHAN 0804-20 LOCATION: N1621E14540 AREA: MARIANA.ISLANDS SUMMIT ELEVATION: 2585 FT (788 M) ADVISORY NUMBER: 2005/292 INFORMATION SOURCE: GFS MODEL WINDS. GOES-9. ERUPTION DETAILS: CONTINUOUS EMISSION OF ASH AND STEAM OBS ASH DATE/TIME: 17/1202Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL080 MOVING TO NE 15-20 KNOTS. FCST ASH CLOUD +6H: 17/1800Z SFC/FL080 15NM WIDE LINE BETWEEN N1718E14731 - N1620E14541. FCST ASH CLOUD +12H: 18/0000Z SFC/FL080 20NM WIDE LINE BETWEEN N1752E14902 - N1619E14540. FCST ASH CLOUD +18H: 18/0600Z SFC/FL080 20NM WIDE LINE BETWEEN N1618E14539 - N1626E14756 - N1544E14923. REMARKS: DUE TO WEATHER CLOUDS NO PLUME CAN BE DETECTED IN IMAGERY. AN OCCASIONAL HOTSPOT CAN BE DETECTED IN BREAKS IN THE CLOUDCOVER WHICH SUGGESTS ERUPTION CONTINUES. LOW CONFIDENCE IN FORECASTED PLUME WIDTH AND LENGTH DUE TO CURRENT CLOUDCOVER. ...SWANSON NEXT ADVISORY: WILL BE ISSUED BY 2005MAY17/1845Z NNNN