FVXX20 KNES 050017
VOLCANIC ASH ADVISORY
ISSUED: 2005JUN05/0016Z   VAAC: WASHINGTON

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

SUMMIT ELEVATION: 2585 FT (788 M)

ADVISORY NUMBER: 2005/366

INFORMATION SOURCE: GFS MODEL WINDS. GOES-9. 

ERUPTION DETAILS: CONTINUOUS EMISSION OF ASH AND
GASES

OBS ASH DATE/TIME: 04/2325Z

OBS ASH CLOUD: SFC/FL240 N1620E14540 - N1544E14549
- N1518E14538 - N1614E14505 - N1620E14540 MOVING
SW 10 KNOTS. SFC/FL180 25NM WIDE LINE BETWEEN
N1819E14338 - N1648E14434 - N1620E14543. ASH IS
MOVING W 10-15 KNOTS. 

FCST ASH CLOUD +6H: 05/0530Z SFC/FL180 40NM WIDE
LINE BETWEEN N1926E14309 - N1809E14313 -
N1632E14400 - N1620E14543. SFC/FL240 N1620E14540 -
N1416E14541 - N1553E14433 - N1620E14540 

FCST ASH CLOUD +12H: 05/1130Z SFC/FL180 30NM WIDE
LINE BETWEEN N1632E14324 - N1619E14543.  SFC/FL240
NO ASH EXP. 

FCST ASH CLOUD +18H: 05/1730Z SFC/FL180 30NM WIDE
LINE BETWEEN N1631E14323 - N1619E14543. 

REMARKS: THE EMISSION HAS BECOME A LITTLE MORE
VIGOROUS AND AT TIMES A SMALL AMOUNT OF THE
EMISSION APPEARS TO BE CAUGHT UP IN A WIND FIELD
THAT IS SLIGHTLY HIGHER AND MORE SOUTHWESTERLY IN
DIRECTION THAN THE BULK OF THE ERUPTION.  IT IS
ESTIMATED THAT THIS FAINT HIGHER LEVEL PORTION IS
TO AROUND FL240.  THE MAIN PLUME HOWEVER REMAINS
ESTIMATED BELOW FL180 AND IS BECOMING MORE
WESTERLY WITH TIME.  ...SWANSON

NEXT ADVISORY: WILL BE ISSUED BY 2005JUN05/0615Z

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