FVXX20 KNES 200435
VOLCANIC ASH ADVISORY
ISSUED: 2005MAY20/0434Z   VAAC: WASHINGTON

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

SUMMIT ELEVATION: 2585 FT (788 M)

ADVISORY NUMBER: 2005/302

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

ERUPTION DETAILS: CONTINUOUS ASH EMISSIONS

OBS ASH DATE/TIME: 20/0302Z

OBS ASH CLOUD: SFC/FL100 N1828E14519 - N1717E14624
- N1534E14646 - N1653E14432 - N1828E14425 -
N1828E14519 MOVING NW 5-10 KNOTS. 

FCST ASH CLOUD +6H: 20/0900Z  SFC/FL100
N1758E14455 - N1755E14520 - N1753E14603 -
N1519E14709 - N1629E14506 - N1758E14455 

FCST ASH CLOUD +12H: 20/1500Z  SFC/FL100
N1837E14441 - N1829E14559 - N1540E14613 -
N1547E14455 - N1837E14441 

FCST ASH CLOUD +18H: 20/2100Z  SFC/FL100
N1925E14358 - N1919E14500 - N1720E14600 -
N1559E14556 - N1656E14403 - N1925E14358 

REMARKS: ASH IS WELL DEPICTED IN VISIBLE AND
MULTISPECTRAL GOES-9 IMAGERY. PRECISE HEIGHT
ASSIGNMENT AND ASH FORECAST COMPLICATED DUE TO
LIGHT WIND REGIME AND SIGNIFICANT SHEAR. ASH
MOVING TO SE CONFINED TO NEAR FL100 BUT FORECAST
SHOWS WINDS AT THIS LEVEL TO SHIFT BY END OF
FORECAST PERIOD. ...RUMINSKI

NEXT ADVISORY: WILL BE ISSUED BY 2005MAY20/1030Z

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