FVXX20 KNES 262333
VOLCANIC ASH ADVISORY
ISSUED: 2005APR26/2332Z   VAAC: WASHINGTON

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

SUMMIT ELEVATION: 2585 FT (788 M)

ADVISORY NUMBER: 2005/207

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


ERUPTION DETAILS: CONTINUOUS LOW LEVEL EMISSION

OBS ASH DATE/TIME: 26/2249Z

OBS ASH CLOUD: SFC/FL070 N2511E14539 - N2456E15149
- N2250E14933 - N2217E14655 - N1619E14535 -
N1754E14416 - N2232E14423 - N2511E14539 MOVING N
15-20 KNOTS. 

FCST ASH CLOUD +6H: 27/0500Z SFC/FL070 N2858E15419
- N2529E15305 - N2119E14734 - N1619E14540 -
N2004E14453 - N2721E14717 - N2858E15419 

FCST ASH CLOUD +12H: 27/1100Z SFC/FL070
N2529E15308 - N2119E15131 - N1625E14539 -
N2001E14622 - N2529E15308 

FCST ASH CLOUD +18H: 27/1700 SFC/FL070 N2120E15043
- N1924E15231 - N1616E14540 - N1810E14540 -
N2120E15043 

REMARKS: VISIBLE IMAGERY SHOW FAINT LOW LEVEL ASH
BEING DRAWN AHEAD OF THE REMNANTS OF HURRICAN
SONCA AND EXTENDING ROUGHLY 485 NM NORTH OF THE
VOLCANO.  THE USGS REPORTS THE SEISMIC SIGNAL HAS
LEVELED OUT.  THE THICKEST AREA OF STEAM AND ASH
ONLY EXTENDS TO AROUND 20 DEGREES NORTH OR ROUGHLY
225 NM FROM THE VOLCANO.  THERE IS LOW CONFIDENCE
IN THE 12 AND 18 HOUR FORECASTS  DUE TO THE
INFLUENCE OF NEAR BY WEAKENING TROPICAL SYSTEM. 
...SWANSON

NEXT ADVISORY: WILL BE ISSUED BY 2005APR27/0530Z

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