FVXX20 KNES 040325
VOLCANIC ASH ADVISORY
ISSUED: 2005JUL04/0324Z   VAAC: WASHINGTON

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

SUMMIT ELEVATION: 2585 FT (788 M)

ADVISORY NUMBER: 2005/493

INFORMATION SOURCE: GFS MODEL WINDS. RADIOSONDE.
GOES-9. 

ERUPTION DETAILS: CONTINUOUS EMISSION OF ASH AND
GASES

OBS ASH DATE/TIME: 04/0225Z

OBS ASH CLOUD: SFC/FL200 N1759E14146 - N1543E14146
- N1547E13937 - N1758E13937 - N1759E14146 MOVING W
15 KNOTS. SFC/FL150 N1737E14149 - N1626E14359 -
N1619E14543 - N1532E14145 - N1737E14149 MOVING W
15 KNOTS. 

FCST ASH CLOUD +6H: 04/0830Z SFC/FL150 N1737E14000
- N1626E14159 - N1618E14544 - N1544E14149 -
N1555E13946 - N1737E14000 
SFC/FL200 NO ASH EXP

FCST ASH CLOUD +12H: 04/1430Z SFC/FL150 30NM WIDE
LINE BETWEEN N1618E14543 - N1556E14141. 

FCST ASH CLOUD +18H: 04/2030Z SFC/FL150 40NM WIDE
LINE BETWEEN N1620E14540 - N1548E14154. 

REMARKS: THERE IS A FAINT WIDE AREA OF ASH
ESTIMATED AROUND FL200 WEST OF VOLCANO THAT IS
DISSIPATING WITH TIME. THE CURRENT EMISSION HAS
BECOME MORE DENSE AND LINEAR AND IS ESTIMATED
SLIGHTLY LOWER IN HEIGHT.  THERE IS AN EXTENSIVE
AREA OF VOG WEST OF THE ASH AREA AND IS AROUND 200
NM WIDE BETWEEN POINTS N21E122 - N19E130 -
N14E139.   ...SWANSON

NEXT ADVISORY: WILL BE ISSUED BY 2005JUL04/0930Z

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