FVXX20 KNES 210410
VOLCANIC ASH ADVISORY
ISSUED: 2005MAY21/0410Z   VAAC: WASHINGTON

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

SUMMIT ELEVATION: 2585 FT (788 M)

ADVISORY NUMBER: 2005/306

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

ERUPTION DETAILS: CONTINUOUS ASH EMISSIONS

OBS ASH DATE/TIME: 21/0302Z

OBS ASH CLOUD: SFC/FL100 N1714E14534 - N1648E14601
- N1633E14602 - N1647E14513 - N1714E14534 MOVING N
5-10 KNOTS. SFC/FL080 N1753E14413 - N1750E14447 -
N1651E14514 - N1629E14540 - N1616E14538 -
N1625E14429 - N1753E14413 MOVING NW 5-10 KNOTS. 

FCST ASH CLOUD +6H: 21/0900Z  SFC/FL100
N1816E14425 - N1641E14551 - N1613E14544 -
N1634E14429 - N1756E14355 - N1816E14425 

FCST ASH CLOUD +12H: 21/1500Z  SFC/FL100
N1829E14423 - N1650E14552 - N1612E14546 -
N1653E14358 - N1826E14337 - N1829E14423 

FCST ASH CLOUD +18H: 21/2100Z  SFC/FL100
N1833E14337 - N1828E14431 - N1654E14550 -
N1613E14543 - N1652E14354 - N1833E14337 

REMARKS: ASH PLUME IS NOTICEABLY MORE DENSE PAST
SEVERAL HOURS INDICATING GREATER VOLUME OF ASH.
THIS IS GIVING VERY STRONG SIGNAL IN ALL
MULTISPECTRAL IMAGES. SEPARATE AREA OF ASH HAS
BROKEN OFF FROM MAIN PLUME AND IS DRIFTING NORTH.
THIS AREA IS SLIGHTLY HIGHER (TO FL100) THAN MAIN
PLUME WHICH EXTENDS TO NW OF VOLCANO. ...RUMINSKI

NEXT ADVISORY: WILL BE ISSUED BY 2005MAY21/1015Z

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