FVXX20 KWBC 121921
VOLCANIC ASH ADVISORY 
ISSUED: 2003SEP12/1920Z VAAC: WASHINGTON
 
VOLCANO: TUNGURAHUA  1502-08
LOCATION: S0128W07826    AREA: ECUADOR
 
SUMMIT ELEVATION: 16480 FT (5023 M)

ADVISORY NUMBER: 2003/236

INFORMATION SOURCE: GOES-12 IMAGERY. GUAYAQUIL MWO SIGMET. 
GFS MODEL WINDS FORECAST. GEOPHYSICAL INSTITUTE.

ERUPTION DETAILS: EMISSION AT 11/0055Z
                                            
OBS ASH DATE/TIME: 12/1845Z.

OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. 
WINDS FL100/270 MOVING W TO SW 10 to 15 KNOTS.

FCST ASH CLOUD+6H: SEE SIGMETS.

REMARKS: THE LATEST OBSERVATION OF ASH BY THE GEOPHYSICAL
INSTITUTE WAS AT 12/1820Z ESTIMATED TO AROUND FL230 MOVING
WEST. AN AIRCRAFT REPORT AT 12/1830Z ESTIMATED ASH TO FL260
MOVING SOUTHWEST. IN IMAGERY AT 12/1845Z THERE IS NO ASH
DETECTED HOWEVER A SHORT WHITE MOUNTAIN WAVE CLOUD CAN BE
SEEN EXTENDING WEST FROM THE SUMMIT. THIS LACK OF ASH
DETECTION MAY BE DUE TO MORE STEAM THAN ASH IN THE PLUME. 

NEXT ADVISORY: WILL BE ISSUED BY 2003SEP13/0130Z.
 
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