FVXX20 KNES 130451
VOLCANIC ASH ADVISORY
ISSUED: 2005AUG13/0450Z   VAAC: WASHINGTON

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

SUMMIT ELEVATION: 2585 FT (788 M)

ADVISORY NUMBER: 2005/668

INFORMATION SOURCE: GFS MODEL WINDS. RADIOSONDE.
PILOT REPORT. GOES-9. USGS. 

ERUPTION DETAILS: CONTINUOUS EMISSTION OF ASH AND
GASES

OBS ASH DATE/TIME: 13/1413Z

OBS ASH CLOUD: SFC/FL200 N1645E14531 - N1621E14542
- N1525E14532 - N1514E14419 - N1642E14422 -
N1645E14531 MOVING SW -NW 10-15 KNOTS. 

FCST ASH CLOUD +6H: 13/2000Z SFC/FL200 N1728E14525
- N1617E14542 - N1459E14500 - N1521E14326 -
N1724E14407 - N1728E14525 

FCST ASH CLOUD +12H: 14/0200Z SFC/FL200
N1754E14553 - N1618E14543 - N1459E14359 -
N1743E14400 - N1754E14553 

FCST ASH CLOUD +18H: 14/0800Z SFC/FL200
N1822E14659 - N1720E14658 - N1617E14544 -
N1550E14359 - N1717E14400 - N1818E14511 -
N1822E14659 

REMARKS: WITH SCATTERED CLOUDS OVER THE AREA AND
WHAT APPEARS TO BE A THUNDERSTORM OVER THE ISLAND
SOME FAINT ASH CAN BE SEEN MOVING SOUTHWEST TO
NORTHWEST FROM THE VOLCANO.  A PILOT REPORT HELPED
FIX THE HEIGHT TO BELOW FL200.  THE LOWER LEVEL
WINDS WILL CONTINUE TO TAKE THE ASH WEST HOWEVER
THE UPPER WINDS ARE FORECAST TO GRADUALY CHANGE TO
TAKE ASH NORTH TO NORTHEAST OVER TIME.  ...SWANSON

NEXT ADVISORY: WILL BE ISSUED BY 2005AUG13/1045Z

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