FVXX20 KNES 231520 CCA
VOLCANIC ASH ADVISORY -CORRECTION
ISSUED: 2005OCT23/1519Z   VAAC: WASHINGTON

VOLCANO: NEGRA, SIERRA 1503-05
LOCATION: S0049 W09110   AREA: GALAPAGOS

SUMMIT ELEVATION: 4888 FT (1490 M)

ADVISORY NUMBER: 2005/005

INFORMATION SOURCE: GUAYAQUIL MWO. GOES-12. GFS
MODEL WINDS. PILOT REPORT. 

ERUPTION DETAILS: LARGE ERUPTION 22/2245Z AND
AGAIN 23/1300Z

OBS ASH DATE/TIME: 23/1415Z

OBS ASH CLOUD: SFC/FL250 N0035 W09047 - S0021
W09056 - S0049 W09110 - S0025 W09242 - N0027
W09159 - N0035 W09047 MOVING N 10 KNOTS. SFC/FL450
S0049 W09110 - S0053 W09109 - S0109 W09129 - S0053
W09132 - S0049 W09110 MOVING SW 25 KNOTS. 

FCST ASH CLOUD +6H: 23/2030Z SFC/FL250 N0051
W09040 - S0021 W09051 - S0050 W09109 - S0025
W09301 - N0050 W09220 - N0051 W09040 SFC/FL420
N0009 W09140 - S0049 W09107 - S0124 W09119 - S0208
W09450 - S0047 W09505 - N0009 W09140 

FCST ASH CLOUD +12H: 24/0230Z SFC/FL250 N0150
W09059 - S0049 W09105 - S0108 W09250 - S0014
W09420 - N0144 W09430 - N0150 W09059 SFC/FL420
S0010 W09432 - S0046 W09107 - S0305 W09746 - S0207
W09804 - S0010 W09432 

FCST ASH CLOUD +18H: 24/0830Z SFC/FL250 N0301
W09516 - N0257 W09129 - S0046 W09107 - N0016
W09528 - N0301 W09516 SFC/FL420 N0131 W09559 -
S0046 W09107 - S0313 W09935 - S0157 W09943 - N0131
W09559 

REMARKS: ...CORRECTION TO FL OF THE HIGH LEVEL
CLOUD IN ALL PERIODS...THE PREVIOUS THINNING HIGH
LEVEL CLOUD HAS DISSIPATED.  IN THE FIRST VISIBLE
IMAGERY OF THE DAY SOME LOWER LEVEL ASH COULD BE
SEEN DRIFTING NORTH FROM THE SUMMIT AND ALSO WHAT
LOOKS LIKE ANOTHER HIGHER LEVEL ERUPTION CLOUD
STARTING TO MOVE SOUTHWEST OFF THE ISLAND.  THERE
WAS A PILOT REPORT OF THE PLUME TO FL420.  THE
ERUPTION CLOUDS MOST LIKELY ALSO CONTAIN SOME
GASES AND STEAM AS THOSE DISSIPATE A LITTLE
FASTER.    ...SWANSON

NEXT ADVISORY: WILL BE ISSUED BY 2005OCT23/2115Z

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