FVXX20 KNES 131249
VOLCANIC ASH ADVISORY
ISSUED: 2005MAY13/1248Z   VAAC: WASHINGTON

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

SUMMIT ELEVATION: 2585 FT (788 M)

ADVISORY NUMBER: 2005/276

INFORMATION SOURCE: GFS MODEL WINDS. GOES-9. 

ERUPTION DETAILS: CONTINUOUS ASH AND GASES
EMISSION

OBS ASH DATE/TIME: 13/1125Z

OBS ASH CLOUD: SFC/090 N1720E14558 - N1620E14541 -
N1543E14420 - N1659E14415 - N1720E14558 MOVING W
-N 05-10 KNOTS. SFC/FL120 N1626E14526 -
N1619E14541 - N1525E14547 - N1519E14459 -
N1626E14526 MOVING S 5-10 KNOTS. 

FCST ASH CLOUD +6H: 13/1730Z SFC/090 N1837E14411 -
N1808E14631 - N1620E14540 - N1614E14359 -
N1837E14411 SFC/FL120 NO ASH EXP

FCST ASH CLOUD +12H: 13/2330Z SFC/090 N1901E14527
- N1852E14652 - N1618E14543 - N1612E14434 -
N1901E14527 

FCST ASH CLOUD +18H: 14/0530Z SFC/090 N1906E14430
- N1852E14652 - N1619E14540 - N1559E14422 -
N1906E14430 

REMARKS: THERE APPEARS TO HAVE BEEN A BRIEF
SLIGHTLY HIGHER LEVEL EMISSION AROUND 09Z UP TO
FL120 AS A PORTION OF THE CLOUD STARTED MOVING
SOUTH.  THE REST OF THE PLUME CONTINUES TO FAN OUT
AT A LOWER LEVEL MOVING WEST TO NORTH  AS THE
PLUME RESPONDS TO A FRONTAL APPROCH FROM THE NORTH
AND HIGH PRESSURE RIDGE TO THE EAST.  ...SWANSON

NEXT ADVISORY: WILL BE ISSUED BY 2005MAY13/1845Z

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