FVXX21 KNES 240006 VOLCANIC ASH ADVISORY ISSUED: 2005FEB24/0005Z VAAC: WASHINGTON VOLCANO: ST. HELENS 1201-05 LOCATION: N4612W12211 AREA: US-WASHINGTON SUMMIT ELEVATION: 8363 FT (2549 M) ADVISORY NUMBER: 2005/001 INFORMATION SOURCE: GFS MODEL WINDS. GOES-10. USGS. ERUPTION DETAILS: ROCKFALL AROUND 23/2335Z. OBS ASH DATE/TIME: 23/2345Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS SFC/FL100 MOVING TO N 5-10 KNOTS. FCST ASH CLOUD +6H: NOT AVBL FCST ASH CLOUD +12H: NOT AVBL FCST ASH CLOUD +18H: NOT AVBL REMARKS: A ROCKFALL WITHIN THE CRATER HAS PRODUCED A PLUME OF ASH THAT ROSE AROUND 1000 FT ABOVE THE CRATER OR BELOW FL100. THE PLUME IS DISSIPATING RAPIDLY AS IT DRIFTS NORTH. DUE TO ITS SMALL SIZE IT MOST LIKELY WILL NOT BE SEEN IN IMAGERY. ... NEXT ADVISORY: NO FURTHER ADVISORIES NNNN