FVXX22 KWBC 311843 VOLCANIC ASH ADVISORY ISSUED: 2003MAY31/1900Z VAAC: WASHINGTON VOLCANO: ANATAHAN 0804-20 LOCATION: N1621E14540 AREA: MARIANA ISLANDS SUMMIT ELEVATION: 2585 FT (788 M) ADVISORY NUMBER: 2003/089 INFORMATION SOURCE: GOES-9 IMAGERY. GUAM UPPER AIR SOUNDING. GFS MODEL WINDS FORECAST. ERUPTION DETAILS: CONTINUOUS ASH AND GAS EMISSIONS SINCE MAY 10. OBS ASH DATE/TIME: 31/1802Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL050 MOVING N 10-15 KNOTS. FL060/FL100 MOVING E 5 KNOTS. FL120/FL150 MOVING SE 5-10 KNOTS. FCST ASH CLOUD +6H: SEE SIGMETS. REMARKS: ASH IS NOT IDENTIFIABLE IN SATELLITE IMAGERY THROUGH 31/1802Z DUE TO OBSCURING DENSE WEATHER CLOUDS. LITTLE INFORMATION IS AVAILABLE TO ACCURATELY DETERMINE CURRENT ASH HEIGHT AND LOCATION. NEXT ADVISORY: WILL BE ISSUED BY 2003JUN01/0100Z. NNNN