FVXX22 KWBC 181831
VOLCANIC ASH ADVISORY
ISSUED: 2003JUN18/1845Z      VAAC: WASHINGTON

VOLCANO: ANATAHAN 0804-20
LOCATION: N1621E14540    AREA: MARIANA ISLANDS
 
SUMMIT ELEVATION: 2585 FT (788 M)

ADVISORY NUMBER: 2003/163
 
INFORMATION SOURCE:  GOES-9 IMAGERY. GFS MODEL WINDS FORECAST.
  
ERUPTION DETAILS: CONTINUOUS ASH AND GAS EMISSIONS SINCE MAY 10. 
 
OBS ASH DATE/TIME: 18/1802Z
 
OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS
SFC/FL090 MOVING W 15-20 KNOTS. 

FCST ASH CLOUD +6H: SEE SIGMETS.

REMARKS: THE WEATHER CLOUDS HAVE BROKEN UP OVER THE SUMMIT. 
HOWEVER A THIS TIME ASH IS NOT DETECTABLE ON IMAGERY.  THIS DOES
NOT MEAN THAT ASH IS NOT PRESENT...LOW LEVEL ASH CAN BE VERY
DIFFICULT TO DETECT AT NIGHT...SO WILL WAIT FOR FIRST VISIBLE
IMAGES.  IF ASH IS PRESENT IT WOULD BE MOVING WEST AT ABOUT 20
KNOTS...GALLINA

NEXT ADVISORY: WILL BE ISSUED BY 2003JUN19/0045Z.

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