FVXX20 KWBC 281247                 
VOLCANIC ASH ADVISORY 
ISSUED: 2003SEP28/1300Z VAAC: WASHINGTON
 
VOLCANO: TUNGURAHUA  1502-08
LOCATION: S0128W07826    AREA: ECUADOR
 
SUMMIT ELEVATION: 16480 FT (5023 M)

ADVISORY NUMBER: 2003/296

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

ERUPTION DETAILS: SERIES OF EMISSIONS STARTING AT 21/2345Z
                                            
OBS ASH DATE/TIME: 28/1215Z

OBS ASH CLOUD: SFC/FL240 10 NM WIDE LINE BETWEEN S0126W07827
S0145W07835. ASH IS MOVING S 5-10 KNOTS.

FCST ASH CLOUD+6H: SEE SIGMETS.

REMARKS: A HOT SPOT HAS BEEN SEEN THROUGH BREAKS IN THE
WEATHER CLOUD DECK IN SHORTWAVE IMAGERY INTERMITTENTLY
THROUGHOUT THE NIGHT. EARLY MORNING VISIBLE IMAGERY SHOWS A
OPTICALLY THIN LAYER OF STRATUS THAT HAS ERODED ENOUGH TO
EXPOSE A PLUME OF ASH EXTENDING 20 NM FROM THE SUMMIT TO THE
SOUTH OF THE VOLCANO.  THIS PLUME IS EVEN MORE EVIDENT USING
MULTI-SPECTRAL ANALYZING TECHNIQUES. GFS MODEL WINDS
FORECAST SHIFTING OF THE WINDS AT THE ASH PLUME HEIGHT
TRANSPORTING THE ASH BETWEEN S TO SE OF THE SUMMIT...GALLINA 

NEXT ADVISORY: WILL BE ISSUED BY 2003SEP28/1900Z.
 
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                                             "Attached Graphic Map Depicting Ash Only" 

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