FVXX20 KNES 231902
VOLCANIC ASH ADVISORY
ISSUED: 2005OCT23/1900Z   VAAC: WASHINGTON

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

SUMMIT ELEVATION: 4888 FT (1490 M)

ADVISORY NUMBER: 2005/006

INFORMATION SOURCE: GOES-12. GFS MODEL WINDS. 

ERUPTION DETAILS: BEGINING 22/2215Z.

OBS ASH DATE/TIME: 23/1815Z

OBS ASH CLOUD: SFC/FL250 N0159 W09059 - S0045
W09030 - S0139 W09223 - N0152 W09300 - N0159
W09059 MOVING SW -N 10-15 KNOTS. 

FCST ASH CLOUD +6H: 24/0030Z SFC/FL250 N0201
W09302 - N0159 W09059 - S0045 W09029 - S0140
W09223 - N0201 W09302 

FCST ASH CLOUD +12H: 24/0630Z SFC/FL250 N0201
W09302 - N0159 W09059 - S0046 W09029 - S0140
W09223 - N0201 W09302 

FCST ASH CLOUD +18H: 24/1230Z SFC/FL250 N0201
W09302 - N0159 W09059 - S0046 W09028 - S0141
W09223 - N0201 W09302 

REMARKS: THE PREVIOUS FORECAST OF ASH AREAS WERE
TO LARGE BASED ON CURRENT IMAGERY.  THE PREVIOUS
AREAS EXTENDED OUT AWAY FROM THE ISLAND AND
DISSIPATE.  IN IMAGERY THE ERUPTION SEEMS TO HIT A
HEIGHT PLATEAU AND THEN FANS OUT.  AS IT MOVES
AWAY FROM THE ISLAND THE CLOUD DISSIPATES RAPIDLY.
 THERE HAVE BEEN NO FURTHER PILOT REPORTS AND
BASED ON WINDS AND CLOUD TEMP THE ESTIMATED HEIGHT
HAS BEEN LOWERED TO FL250.  THERE HAS ALSO BEEN AN
ELONGATED HOTSPOT DETECTED FOR MANY HOURS.
...SWANSON

NEXT ADVISORY: WILL BE ISSUED BY 2005OCT24/0100Z

NNNN
Full Size Graphic

-Graphic Map Depicting Ash