FVXX23 KNES 070239
VOLCANIC ASH ADVISORY
ISSUED: 20070307/0239Z   VAAC: WASHINGTON

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

SUMMIT ELEVATION: 16480 FT (5023 M)

ADVISORY NUMBER: 2007/054

INFORMATION SOURCE: GUAYAQUIL MWO. GOES-12. GFS
WINDS. GEOPHYSICAL INST. METAR. 

ERUPTION DETAILS: ONGOING EMISSIONS

OBS ASH DATE/TIME: 07/0215Z

OBS ASH CLOUD: SFC/FL300 S0101 W07855 - S0125
W07826 - S0129 W07826 - S0126 W07904 - S0101
W07855 MOVING NW 5-10 KNOTS. 

FCST ASH CLOUD +6H: 07/0830Z SFC/FL300 25NM WIDE
LINE BETWEEN S0128 W07924 - S0128 W07826. 

FCST ASH CLOUD +12H: 07/1430Z SFC/FL300 25NM WIDE
LINE BETWEEN S0128 W07826 - S0135 W07924. 

FCST ASH CLOUD +18H: 07/2030Z SFC/FL300 25NM WIDE
LINE BETWEEN S0128 W07826 - S0139 W07922. 

REMARKS: MULTISPECTRAL SIGNALS OF THE ASH PLUME
HAVE DECREASED OVER THE LAST FEW HOURS...
PARTICULARLY ON THE WESTERN EDGES WHERE IT
BECOMES EQUAL TO BACKGROUD NOISE.   SO WOULD
SUSPECT THE PLUME EXTENDS FURTHER WEST THAN
DESCRIBED IN OBS LINE.  FORECAST CONTINUES TO
SHIFT ASH MOVEMENT FROM NW TO SW BY 18HRS...
FIRST HINTS OF THE SHIFT ARE OCCURRING AT THIS
TIME.  ...GALLINA

NEXT ADVISORY: WILL BE ISSUED BY 20070307/0845Z

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