FVXX20 KNES 212138
VOLCANIC ASH ADVISORY
ISSUED: 2005AUG21/2138Z   VAAC: WASHINGTON

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

SUMMIT ELEVATION: 2585 FT (788 M)

ADVISORY NUMBER: 2005/704

INFORMATION SOURCE: GFS MODEL WINDS. GOES-9. 

ERUPTION DETAILS: ONGOING ASH EMISSIONS

OBS ASH DATE/TIME: 21/2102Z

OBS ASH CLOUD: SFC/FL100 20NM WIDE LINE BETWEEN
N1840E14408 - N1805E14412 - N1635E14504 -
N1622E14540. ASH IS MOVING NW 5-10 KNOTS. 

FCST ASH CLOUD +6H: 22/0300Z SFC/FL100 40NM WIDE
LINE BETWEEN N1912E14403 - N1805E14347 -
N1647E14430 - N1620E14540. 

FCST ASH CLOUD +12H: 22/0900Z SFC/FL100 40NM WIDE
LINE BETWEEN N1915E14333 - N1755E14249 -
N1646E14331 - N1622E14539. 

FCST ASH CLOUD +18H: 22/1500Z SFC/FL100 40NM WIDE
LINE BETWEEN N1751E14153 - N1658E14219 -
N1623E14540. 

REMARKS: HIGH CIRRUS FROM COMBINED OUTFLOWS OF
TYPHOON MAWAR AND TROPICAL STORM GUCHOL ARE AGAIN
OBSCURRING PORTIONS OF THE ASH PLUME NW OF THE
VOLCANO. HOWEVER...ESTIMATED GENERAL LOCATION
BASED ON OLDER IMAGES.  WINDS AT THE VOLCANO ARE
SHIFTING FROM SE TO E...SO TRANSPORT OF ASH WILL
CONTINUE NW FOR A FEW MORE HOURS BEFORE W MOTION
TAKES OVER BY THE END OF THE PERIOD.  SOME ASH MAY
CONTINUE TO DRIFT N OR NE ALONG THE SHEAR LINE
WHERE THE INFLUENCE OF THE TROPICAL CYCLONES IS
STILL GOOD.   ...GALLINA

NEXT ADVISORY: WILL BE ISSUED BY 2005AUG22/0345Z

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