FVXX24 KNES 021423
VOLCANIC ASH ADVISORY
ISSUED: 2005JUL02/1423Z   VAAC: WASHINGTON

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

SUMMIT ELEVATION: 8363 FT (2549 M)

ADVISORY NUMBER: 2005/11

INFORMATION SOURCE: GOES-12. GFS MODEL WINDS.
RADIOSONDE. PILOT REPORT. USGS. 

ERUPTION DETAILS: SEISMIC EVENT WITH REPORTED ASH
OVER SUMMIT

OBS ASH DATE/TIME: 02/1400Z

OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE
DATA. WINDS SFC/FL090 MOVING TO SE 20 KNOTS.

FCST ASH CLOUD +6H: NOT AVBL

FCST ASH CLOUD +12H: NOT AVBL

FCST ASH CLOUD +18H: NOT AVBL

REMARKS: THERE WAS A PILOT REPORT AT 02/1340Z OF
ASH OVER THE SUMMIT AT FL090 MOVING SE.  THE USGS
REPORTS A SEISMIC EVENT OCCURED JUST BEFORE THE
OBSERVATION OF ASH.  THIS EVENT  PRODUCED SOME
ROCKFALLS THAT KICKED ASH INTO AIR.  USGS REPORTS
NO FURTHER SEISMIC ACTIVITY.  MOST OF THE ASH WILL
FALL IN AND AROUND THE SUMMIT.
ASH IS NOT OBSERVED IN THE SATELLITE IMAGERY
THROUGH 02/1400Z.  THIS WILL BE THE ONLY MESSAGE
ON THIS EVENT.
WALTER ...

NEXT ADVISORY: NO FURTHER ADVISORIES

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