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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