FVXX22 KWBC 231844 VOLCANIC ASH ADVISORY ISSUED: 2003JUN23/1900Z VAAC: WASHINGTON VOLCANO: ANATAHAN 0804-20 LOCATION: N1621E14540 AREA: MARIANA ISLANDS SUMMIT ELEVATION: 2585 FT (788 M) ADVISORY NUMBER: 2003/183 INFORMATION SOURCE: NOAA 16 AND GOES 9 IMAGERY. GFS MODEL WINDS FORECAST. ERUPTION DETAILS: CONTINUOUS ASH AND GAS EMISSIONS SINCE MAY 10. OBS ASH DATE/TIME: 23/1630Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL080 MOVING W 10-15 KNOTS. FCST ASH CLOUD +6H: SEE SIGMETS. REMARKS: THE CLOUDS HAVE MOVED WEST OF THE VOLCANO BUT IT IS DIFFICULT TO DETECT ASH IN INFRARED AND MULTISPECTRAL IMAGERY. WE WILL WAIT FOR VISIBLE IMAGERY TO SEE IF ASH CAN BE DETECTED. ANY ASH IS ESTIMATED AT FL080. NEXT ADVISORY: WILL BE ISSUED BY 2003JUN24/0100Z. NNNN