FVXX20 KNES 282032
VOLCANIC ASH ADVISORY
ISSUED: 2005OCT28/2032Z   VAAC: WASHINGTON

VOLCANO: NEGRA, SIERRA 1503-05
LOCATION: S0049 W09109   AREA: GALAPAGOS

SUMMIT ELEVATION: 4888 FT (1490 M)

ADVISORY NUMBER: 2005/028

INFORMATION SOURCE: GOES-12. GFS MODEL WINDS. 

ERUPTION DETAILS: ONGOING EMISSIONS SINCE 22/2245

OBS ASH DATE/TIME: 28/1945Z

OBS ASH CLOUD: SFC/FL050 25NM WIDE LINE BETWEEN
S0000 W09146 - S0049 W09108. ASH IS MOVING NW
10-15 KNOTS. SFC/FL100 20NM WIDE LINE BETWEEN
S0049 W09108 - S0101 W09129. ASH IS MOVING SW
10-15 KNOTS. 

FCST ASH CLOUD +6H: 29/0200Z SFC/FL050 25NM WIDE
LINE BETWEEN S0000 W09146 - S0050 W09108.
SFC/FL100 25NM WIDE LINE BETWEEN S0049 W09108 -
S0118 W09200. 

FCST ASH CLOUD +12H: 29/0800Z SFC/FL050 25NM WIDE
LINE BETWEEN N0001 W09146 - S0050 W09108.
SFC/FL100 25NM WIDE LINE BETWEEN S0049 W09109 -
S0140 W09143. 

FCST ASH CLOUD +18H: 29/1400Z SFC/FL050 25NM WIDE
LINE BETWEEN N0001 W09147 - S0050 W09108.
SFC/FL100 40NM WIDE LINE BETWEEN S0049 W09109 -
S0144 W09129. 

REMARKS: THERE CONTINUES TO BE A FAINT PLUME
MOVING NORTH NORTHWEST FROM THE SUMMIT THAT IS
ESTIMATED BELOW FL050 OVER THE PAST HOUR THERE NOW
APPEARS TO BE A SLIGHTLY HIGHER PLUME MOVING WEST
SOUTHWEST FROM THE SUMMIT AND BASED ON MODEL WINDS
IT IS ESTIMATED TO BE AROUND FL100.  OVER TIME THE
LOWER LEVEL PLUME WILL CONTINUE IN THE SAME
DIRECTION WHILE THE UPPER LEVEL PLUME WILL BECOME
MORE SOUTHERLY WITH TIME.  BOTH ARE FAINT  AND
MADE OF GASES AND LIGHT ASH AND WILL LIKELY
DISSIPATE AS THEY MOVE AWAY.  ...SWANSON

NEXT ADVISORY: WILL BE ISSUED BY 2005OCT29/0230Z

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