FVXX20 KNES 170846 VOLCANIC ASH ADVISORY ISSUED: 2005JUL17/0846Z VAAC: WASHINGTON VOLCANO: ANATAHAN 0804-20 LOCATION: N1621E14540 AREA: MARIANA.ISLANDS SUMMIT ELEVATION: 2585 FT (788 M) ADVISORY NUMBER: 2005/553 INFORMATION SOURCE: GFS MODEL WINDS. RADIOSONDE. GOES-9. USGS. ERUPTION DETAILS: CONTINUOUS EMISSION OF ASH AND GASES OBS ASH DATE/TIME: 17/0802ZZ OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL100 MOVING TO NW 10 KNOTS. FL100/FL200 MOVING TO W 10-15 KNOTS. FCST ASH CLOUD +6H: FCST ASH CLOUD +12H: FCST ASH CLOUD +18H: REMARKS: THUNDERSTORMS CLOUDS OVER THE ISLAND AND SURROUNDING AREA OBSCURE DETECTION OF ANY ASH. THE VOLCANO REPORT STILL CONFIRMS CONTINUED STRONG SEISMIC ACTIVITY. ...SWANSON NEXT ADVISORY: WILL BE ISSUED BY 2005JUL17/1445Z NNNN