FVXX20 KWBC 211615
VOLCANIC ASH ADVISORY
ISSUED: 2003DEC21/1630Z VAAC: WASHINGTON

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

SUMMIT ELEVATION: 16480 FT (5023 M)          

ADVISORY NUMBER: 2003/630

INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS
FORECAST. GUAYAQUIL MWO SIGMET.  GEOPHYSICAL INSTITUTE.
 
ERUPTION DETAILS: ASH EMISSIONS
                         
OBS ASH DATE/TIME: 21/1545Z 

OBS ASH CLOUD: SFC/250 S0128W07826 - S0114W07843 -
S0130W07853 MOVING TO W 5-15 KNOTS.
                              
FCST ASH CLOUD+6H: NOT AVBL
FCST ASH CLOUD+12H: NOT AVBL  
FCST ASH CLOUD+18H: NOT AVBL

REMARKS: VISIBLE SATELLITE IMAGERY SHOWS AN ABUNDANCE OF
CLOUDS IN THE VICINITY OF THE SUMMIT MAKING ASH DETECTION
DIFFICULT. HOWEVER...MULTI-SPECTRAL TECHNIQUES SHOW AN
ENHANCED AREA TO THE WEST OF THE SUMMIT WHERE ASH SHOULD BE
LOCATED BASED ON WIND INFORMATION. THE ENHANCEMENT APPEARS
TO BE FANNED OUT ABOUT 45 DEGREES FROM NW TO W OF THE
SUMMIT.  

NEXT ADVISORY: WILL BE ISSUED BY 2003DEC21/2230Z.    

NNNN"Attached Graphic Map Depicting Ash Only" 

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