FVXX20 KNES 200557
VOLCANIC ASH ADVISORY
ISSUED: 2005APR20/0556Z   VAAC: WASHINGTON

VOLCANO: ANATAHAN 0804-20
LOCATION: N1621E14539   AREA: MARIANA.ISLANDS

SUMMIT ELEVATION: 2585 FT (788 M)

ADVISORY NUMBER: 2005/180

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

ERUPTION DETAILS: CONTINUOUS LOW LEVEL EMISSION

OBS ASH DATE/TIME: 20/0525Z

OBS ASH CLOUD: SFC/FL100 10NM WIDE LINE BETWEEN
N1619E14540 - N1613E14501. ASH IS MOVING W 25
KNOTS. 

FCST ASH CLOUD +6H: 20/1130Z SFC/FL100 15NM WIDE
LINE BETWEEN N1619E14540 - N1610E14335. 

FCST ASH CLOUD +12H: 20/1730Z SFC/FL100 20NM WIDE
LINE BETWEEN N1614E14329 - N1618E14540. 

FCST ASH CLOUD +18H: 20/2330Z SFC/FL100 20NM WIDE
LINE BETWEEN N1614E14326 - N1617E14541. 

REMARKS: A FAINT PLUME OF STEAM AND LIGHT ASH CAN
BE SEEN IN VISIBLE IMAGERY EXTENDING WEST FROM THE
ISLAND AROUND 40 NM BEFORE GOING UNDER AND AREA OF
HIGHER LEVEL CLOUDS.  THE PLUME MOST LIKELY
EXTENDS FURTHER WEST UNDER THE CLOUDS.  
...SWANSON

NEXT ADVISORY: WILL BE ISSUED BY 2005APR20/1200Z

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