FVXX20 KNES 011939
VOLCANIC ASH ADVISORY
ISSUED: 2004OCT01/1938Z   VAAC: WASHINGTON

VOLCANO: ST. HELENS 1201-05
LOCATION: N4612W12211   AREA: US-WASHINGTON

SUMMIT ELEVATION: 8363 FT (2549 M)

ADVISORY NUMBER: 2004/004

INFORMATION SOURCE: GFS MODEL WINDS. GOES-10.
USGS. 

ERUPTION DETAILS: ASH EMISSION AROUND 19Z	

OBS ASH DATE/TIME: 01/1930Z

OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE
DATA. WINDS SFC/FL160 MOVING TO S 10-20 KNOTS.

FCST ASH CLOUD +6H: NOT AVBL

FCST ASH CLOUD +12H: NOT AVBL

FCST ASH CLOUD +18H: NOT AVBL

REMARKS: A VERY SMALL AREA OF ASH JUST SOUTH OF
THE VOLCANO COULD BE SEEN IN GOES IMAGERY AT 1915Z
BUT WAS TOO FAINT TO SEE BY 1930Z.  PLUME IS
MOSTLY STEAM BUT WITH SOME ASH.  THE ACTIVE
EMISSION LASTED ABOUT 10 MINUTES AND IS NOW
BELIEVED TO BE OVER BUT A VERY SMALL AMOUNT OF ASH
REMAINS IN THE ATMOSPHERE. ASH TOPS ARE ESTIMATED
TO BE BETWEEN FL120 AND FL160. ...

THIS PRODUCTS HEADER WILL CHANGE FROM KWBC TO KNES
EFFECTIVE OCT 28, 2004.

NEXT ADVISORY: WILL BE ISSUED BY 2004OCT02/0145Z

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