FVXX20 KWBC 230600
VOLCANIC ASH ADVISORY
ISSUED: 2003DEC23/0555Z VAAC: WASHINGTON

VOLCANO: TUNGURAHUA  1502-08
LOCATION: S0128W07826    AREA: ECUADOR

SUMMIT ELEVATION: 16480 FT (5023 M)

ADVISORY NUMBER: 2003/637

INFORMATION SOURCE: GOES-12 IMAGERY. GUAYAQUIL MWO SIGMET.
GEOPHYSICAL INSTITUTE. GFS MODEL WINDS FORECAST. 
 
ERUPTION DETAILS: ASH EMISSIONS.
                         
OBS ASH DATE/TIME: 23/0515Z.

OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA.
WINDS FL100/240 MOVING TO WEST 10-15 KNOTS.            
               
FCST ASH CLOUD+6H: NOT AVBL
FCST ASH CLOUD+12H: NOT AVBL  
FCST ASH CLOUD+18H: NOT AVBL

REMARKS: DUE TO WEATHER CLOUDS NO ASH CAN BE DETECTED IN
SATELLITE IMAGERY. THE GEOPHYSICAL INSTITUTE EVENING REPORT
STATES THAT STEAM AND ASH EMISSIONS ARE NEARLY CONSTANT AND
THAT THE PLUME RISES AROUND ONE HALF A NAUTICAL MILE ABOVE
THE SUMMIT AND THEN DOWNWIND TO THE NORTHWEST. THE LAST
OBSERVATION NEAR 23/0400Z ESTIMATED THE ASH OVER THE VOLCANO
TO FL220.

NEXT ADVISORY: WILL BE ISSUED BY 2003DEC23/1200Z.

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