FVXX22 KWBC 201714
VOLCANIC ASH ADVISORY             
ISSUED: 2003MAY20/1700Z      VAAC: WASHINGTON
 
VOLCANO: ANATAHAN 0804-20
LOCATION: N1621E14540    AREA: MARIANA ISLANDS
 
SUMMIT ELEVATION: 2585 FT (788 M)

ADVISORY NUMBER: 2003/043
 
INFORMATION SOURCE:  GOES-9 IMAGERY. GFS MODEL WINDS FORECAST 

ERUPTION DETAILS: ONGOING ASH EMISSIONS...FIRST ERUPTION BEGAN
MAY 10
 
OBS ASH DATE/TIME: 20/1525Z
 
OBS ASH CLOUD: SFC/FL070 N1621E14540 N1721E14456 N1716E14443
N1609E14330 N1552E14335 N1621E14540 MOVING W 10-15 KNOTS.

SFC/FL120 40 NM WIDE LINE OF ASH EXTENDING BETWEEN N1456E14538
N1413E14413. ASH IS MOVING SW 5-10 KNOTS.

SFC/FL070 150 NM WIDE LINE OF ASH EXTENDING BETWEEN N1609E14351
N1609E14352.  ASH IS MOVING W 10-15 KNOTS. 

SFC/FL070 150 NM WIDE LINE OF ASH EXTENDING BETWEEN N1609E14352
N1817E13838.  ASH IS MOVING NW 15-20 KNOTS.

SFC/FL070 150 NM WIDE LINE OF ASH EXTENDING BETWEEN N1817E13838
N2259E13945.  ASH IS MOVING N 15-20 KNOTS.

FCST ASH CLOUD +6H: SEE SIGMETS. 

REMARKS: MULTISPECTRAL IMAGERY THROUGH 1525Z SHOWS A STRONG ASH
PLUME FANNING OUT FROM THE SUMMIT AND BELIEVED TO BE AT FL070. A
SECOND AREA OF ASH HAS MOVED SOUTH FROM THE VOLCANO AND IS
BECOMING OBSCURED BY CLOUDS. THIS AREA IS ESTIMATED TO BE AT
FL120.  DUE TO THE EXTENT OF ASH IN THE VISIBLE IMAGERY FROM
0802Z A PROBABLE ASH AREA AT FL070 AND 150NM WIDE HAS BEEN ADDED
TO THIS ADVISORY.  IT IS POSSIBLE THAT THERE IS ADDITIONAL ASH
FARTHER NORTH THAT IS HIDDEN BY THE FRONTAL CLOUDS.

NEXT ADVISORY: WILL BE ISSUED BY 2003MAY20/2300Z.

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"Attached Graphic Map Depicting Ash Only" 

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