FVXX20 KNES 051857
VOLCANIC ASH ADVISORY
ISSUED: 2005JUL05/1857Z   VAAC: WASHINGTON

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

SUMMIT ELEVATION: 2585 FT (788 M)

ADVISORY NUMBER: 2005/501

INFORMATION SOURCE: GFS MODEL WINDS. GOES-9. 

ERUPTION DETAILS: ONGOING ASH EMISSIONS

OBS ASH DATE/TIME: 05/1825Z

OBS ASH CLOUD: SFC/FL250 15NM WIDE LINE BETWEEN
N1618E14539 - N1555E14425. ASH IS MOVING SW 5-10
KNOTS. SFC/FL150 25NM WIDE LINE BETWEEN
N1701E14014 - N1635E14210 - N1547E14254 -
N1618E14432 - N1618E14538. ASH IS MOVING W 5-10
KNOTS. 

FCST ASH CLOUD +6H: 06/0025Z SFC/FL250 N1622E14538
- N1610E14541 - N1513E14341 - N1558E14320 -
N1622E14538 SFC/FL150 N1808E13841 - N1626E14540 -
N1614E14540 - N1516E13837 - N1808E13841 

FCST ASH CLOUD +12H: 06/0625Z SFC/FL250
N1620E14538 - N1607E14541 - N1437E14342 -
N1536E14244 - N1620E14538 SFC/FL150 N1810E13841 -
N1629E14537 - N1616E14539 - N1517E13839 -
N1810E13841 

FCST ASH CLOUD +18H: 06/1225Z SFC/FL250
N1620E14534 - N1616E14545 - N1444E14453 -
N1414E14221 - N1556E14201 - N1539E14337 -
N1620E14534 SFC/FL150 N1810E13841 - N1628E14537 -
N1614E14537 - N1516E13838 - N1810E13841 

REMARKS: SPLIT WINDOW IMAGERY INDICATES A
DIVERGENCE OF ASH WITH SOME MOVING W AND SOME
MOVING SW. THIS IS MOST LIKELY A DIFFERENCE IN THE
MAXIUM ALTITUDE OF THE ASH.   THE HIGHER LEVEL
FLOW HAS A MORE NORTHERLY COMPONENT AND SO ASH IS
MOVING MORE SW TO FL250. LOW LEVEL ASH IS WESTERLY
AND BASED ON GFS SOUNDING...PLACED THE HEIGHT AT
FL150.   ...GALLINA

NEXT ADVISORY: WILL BE ISSUED BY 2005JUL06/0100Z

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