FVXX22 KWBC 252307
VOLCANIC ASH ADVISORY
ISSUED: 2003MAY25/2300Z      VAAC: WASHINGTON

VOLCANO: ANATAHAN 0804-20
LOCATION: N1621E14540    AREA: MARIANA ISLANDS
 
SUMMIT ELEVATION: 2585 FT (788 M)

ADVISORY NUMBER: 2003/065
 
INFORMATION SOURCE:  GOES-9 IMAGERY. GFS MODEL WINDS FORECAST.
GUAM 12Z UPPER AIR SOUNDING.
  
ERUPTION DETAILS: CONTINUOUS ASH AND GAS EMISSION SINCE MAY 10. 
 
OBS ASH DATE/TIME: 25/2213Z
 
OBS ASH CLOUD: SFC/FL100 N1747E14758 N1635E14540 N1612E14540
N1512E14812 N1510E15000 N1535E15341 N1702E15326 N1747E15118 
MOVING E 10 KNOTS.

FCST ASH CLOUD +6H: SEE SIGMETS AND VAFTAD. 

REMARKS: IN THE FIRST VISIBLE IMAGERY OF THE DAY THE ASH CAN BE
SEEN NOW MOVING IN A MORE EASTERLY DIRECTION. DUE TO SLIGHT
VARIABILITY IN WIND DIRECTION AT HEIGHTS BELOW FL100 THE ASH IS
DISPERSED IN A WIDE BAND OF AROUND 2 DEGREES. DUE TO THE MORE
EASTERLY DIRECTION THE ESTIMATED HEIGHT OF THE ASH HAS BEEN
LOWERED TO FL100.  THE LEADING EDGE IS APPROXIMATELY 450 NM EAST
FROM THE SUMMIT AND AT ITS WIDEST IS AROUND 162 NM WIDE. 

NEXT ADVISORY: WILL BE ISSUED BY 2003MAY26/0500Z

NNNN"Attached Graphic Map Depicting Ash Only" 

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