FVXX21 KNES 311907
VOLCANIC ASH ADVISORY
ISSUED: 20070731/1908Z   VAAC: WASHINGTON

VOLCANO: TUNGURAHUA 1502-08
LOCATION: S0128 W07826   AREA: ECUADOR

SUMMIT ELEVATION: 16480 FT (5023 M)

ADVISORY NUMBER: 2007/472

INFORMATION SOURCE: GOES-12. GFS WINDS. GUAYAQUIL
MWO SIGMETS

ERUPTION DETAILS: CONTINUING WEAK ASH EMISSIONS

OBS ASH DATE/TIME: 31/1815Z

OBS ASH CLOUD: SFC/FL220 4NM WIDE LINE BETWEEN
S0125 W07840 - S0128 W07826. ASH IS MOVING W 10
KNOTS. 

FCST ASH CLOUD +6H: 01/0030Z NOT AVBL.

FCST ASH CLOUD +12H: 01/0630Z NOT AVBL.

FCST ASH CLOUD +18H: 01/1230Z NOT AVBL.

REMARKS: SIGMETS INDICATE THAT THE GEOPHYSICAL
INST OBSERVERS REPORTED ASH TO FL200 AT 1745Z 
AND 1750Z.  HOWEVER UNDER CLEAR SKIES ONLY A
NARROW AND EXCEPTIONALLY FAINT ASH PLUME CAN BE
SEEN IN SATELLITE IMAGERY.  THE PLUME EXTENDS
FROM THE VOLCANO TOWARD THE WEST NORTHWEST.  DUE
TO INCONSISTENCY BETWEEN THE OBSERVED ASH PLUME
DIRECTION AND THE MODEL WIND FIELDS NO RELIABLE
ASH FORECAST IS AVAILABLE.   ...

NEXT ADVISORY: WILL BE ISSUED BY 20070801/0115Z

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