FVXX20 KWBC 311902
VOLCANIC ASH ADVISORY
ISSUED: 2003OCT31/1930Z VAAC: WASHINGTON
 
VOLCANO: TUNGURAHUA  1502-08
LOCATION: S0128W07826    AREA: ECUADOR
 
SUMMIT ELEVATION: 16480 FT (5023 M)

ADVISORY NUMBER: 2003/437

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

ERUPTION DETAILS: CONTINUED ASH AND STEAM EXHALATIONS

OBS ASH DATE/TIME: 31/1845Z

OBS ASH CLOUD: SFC/FL180 7 NM WIDE LINE BETWEEN S0128W07826
S0126W07744. ASH IS MOVING E 5-10 KNOTS.
                                             
FCST ASH CLOUD+6H: SEE SIGMETS

REMARKS: PLUME HAS REMAINED STEADY STATE FOR THE PAST 6
HOURS WITH ASH WITHIN THE PLUME HAS MOVED TOWARD THE NE BUT
IS STARTING TO SHIFT MORE TOWARDS THE EAST.  SURFACE REPORTS
VIA SIGMETS HAVE SUGGESTED THE MAXIMUM HEIGHT OF THE PLUME
IS NOT MUCH OVER THE SUMMIT...SO WILL LOWER TO FL180 BASED
ON THAT INFORMATION. ASH PLUME HAS A VERY FAINT APPEARANCE
AND IS MIXED WITH WEATHER CLOUDS...GALLINA 

NEXT ADVISORY: WILL BE ISSUED BY 2003NOV01/0130Z.

NNNN"Attached Graphic Map Depicting Ash Only" 

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