FVXX20 KNES 222241
VOLCANIC ASH ADVISORY
ISSUED: 2005MAY22/2241Z   VAAC: WASHINGTON

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

SUMMIT ELEVATION: 2585 FT (788 M)

ADVISORY NUMBER: 2005/313

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

ERUPTION DETAILS: CONTINUOUS EMISSION OF ASH AND
GASES

OBS ASH DATE/TIME: 22/2125Z

OBS ASH CLOUD: SFC/FL050 20NM WIDE LINE BETWEEN
N1620E14541 - N1611E14434. ASH IS MOVING W 10
KNOTS. SFC/FL100 N1819E14252 - N1428E14626 -
N1402E14355 - N1600E14158 - N1819E14252 MOVING SW
10-15 KNOTS. 

FCST ASH CLOUD +6H: 23/0330Z SFC/FL050 25NM WIDE
LINE BETWEEN N1619E14542 - N1611E14322. SFC/FL100
N1801E14233 - N1352E14617 - N1238E14332 -
N1547E14026 - N1801E14233 

FCST ASH CLOUD +12H: 23/0930Z SFC/FL050 30NM WIDE
LINE BETWEEN N1613E14145 - N1617E14543.  SFC/FL100
NO ASH EXP

FCST ASH CLOUD +18H: 23/1230Z SFC/050 30NM WIDE
LINE BETWEEN N1613E14350 - N1617E14543. 

REMARKS: CURRENTLY ASH FROM THE VOLCANO APPEARS TO
BE HEADING WESTERLY AROUND FL050 AND EXTENDS OUT
AROUND 65 NM.  THERE IS A HIGHER LEVEL AREA OF ASH
AND GASES ESTIMATED AROUND FL100 THAT HAS NOT
DISIPATED YET BUT IS BECOMING FAINTER WITH TIME AS
IT MOVES SOUTHWEST.  IT HAS MOVED OVER SAIPAN AND
TINIAN AND IS APROACHING ROTA. IT IS FORECAST TO
MOVE OVER GUAM BUT WILL VERY FAINT BY THEN. 
...SWANSON

NEXT ADVISORY: WILL BE ISSUED BY 2005MAY23/0430Z

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