FVXX20 KNES 212224
VOLCANIC ASH ADVISORY
ISSUED: 2005AUG21/2224Z   VAAC: WASHINGTON

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

SUMMIT ELEVATION: 2585 FT (788 M)

ADVISORY NUMBER: 2005/705

INFORMATION SOURCE: HONOLULU MWO. GFS MODEL WINDS.
PILOT REPORT. GOES-9. AFWA

ERUPTION DETAILS: ONGOING ASH EMISSIONS

OBS ASH DATE/TIME: 21/2125Z

OBS ASH CLOUD: SFC/FL150 20NM WIDE LINE BETWEEN
N1840E14408 - N1805E14412 - N1635E14504 -
N1622E14540. ASH IS MOVING NW 5-10 KNOTS.
SFC/FL260 10NM WIDE LINE BETWEEN N1620E14540 -
N1606E14522. ASH IS MOVING SW 0-5 KNOTS. 

FCST ASH CLOUD +6H: 22/0330Z SFC/FL150 40NM WIDE
LINE BETWEEN N1912E14403 - N1805E14347 -
N1647E14430 - N1620E14540. 

FCST ASH CLOUD +12H: 22/0930Z SFC/FL150 40NM WIDE
LINE BETWEEN N1915E14333 - N1755E14249 -
N1646E14331 - N1622E14539. 

FCST ASH CLOUD +18H: 22/1530Z SFC/FL150 40NM WIDE
LINE BETWEEN N1751E14153 - N1658E14219 -
N1623E14540. 

REMARKS: A PILOT REPORT AROUND 21Z INDICATED A
MAXIMUM HEIGHT OF FL260 NEAR THE VOLCANO.  EARLY
VISIBLE IMAGERY DOES SHOW A SMALL PUFF MOVING TO
THE SW WHICH MATCHES WELL WITH THE SOUNDING AND
GFS WINDS AT THAT HEIGHT.  STILL BELIEVE BULK OF
ASH IS LOW AND THIS WAS A SHORT DURATION
PUFF...BUT RAISED LOW LEVEL PLUME HEIGHTS TO FL150
TO BE CAUTIOUS.   ...GALLINA

NEXT ADVISORY: WILL BE ISSUED BY 2005AUG22/0430Z

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