FVXX20 KNES 211241
VOLCANIC ASH ADVISORY
ISSUED: 2005APR21/1241Z   VAAC: WASHINGTON

VOLCANO: ANATAHAN 0804-20
LOCATION: N1621E14540   AREA: MARIANA.ISLANDS

SUMMIT ELEVATION: 2585 FT (788 M)

ADVISORY NUMBER: 2005/185

INFORMATION SOURCE: GOES-12. GFS MODEL WINDS.
RADIOSONDE. 

ERUPTION DETAILS: CONTINOUS ASH AND STEAM
EMISSIONS

OBS ASH DATE/TIME: 21/1202Z

OBS ASH CLOUD: SFC/FL100 15NM WIDE LINE BETWEEN
N1635E14445 - N1621E14538. ASH IS MOVING W 15-20
KNOTS. 

FCST ASH CLOUD +6H: SFC/FL 15NM WIDE LINE BETWEEN
N1657E14425 - N1621E14538. 

FCST ASH CLOUD +12H: SFC/FL100 15NM WIDE LINE
BETWEEN N1711E14426 - N1622E14538. 

FCST ASH CLOUD +18H: SFC/FL100 15NM WIDE LINE
BETWEEN N1711E14425 - N1622E14538. 

REMARKS: MULTIPECTRAL IMAGERY INDICATES A DENSER
PLUME  BEGAN EMITTING FROM THE VOLCANO AROUND
21/1100Z.  ...SCHWARTZ

NEXT ADVISORY: WILL BE ISSUED BY 2005APR21/1845Z

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