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Issue time:

Colour code

SFC/Flight Level 200


Date: 2011-12-29 16:00 UTC
Area: Aleutian_is
Source: Avo
Aviation colour code: 
Summit elevation:  5676 ft [1730 m]
Eruption Details: brief eruption at 20120407/0526z reported by avo.

Volcano ash cloud Aleutian_is - Cleveland   Thursday 29 Dec 2011 16:00 UTC

Remarks: please see fvak23 pawu 291558 issued by theanchorage vaac that describes conditions near thewashington vaac area of responsibiltiy. ...salemi

This data supplements the official Volcanic Ash Advisory Graphics and Volcanic Ash Advisories. The data is to be used with caution. The official Volcanic Ash Graphics and Volcanic Ash Advisories take precedence in all circumstances. Please refer to national NOTAMs for definitive boundaries of no-fly areas.

Altitiude levels (International Standard Atmosphere)

SFC to FL200 - Ash concentrations between the surface and 20,000 feet.
FL200 to FL350 - Ash concentrations between 20,000 feet and 35,000 feet.
FL350 to FL550 - Ash concentrations between 35,000 feet and 55,000 feet.
SFC to 6000FT - Ash concentrations between the surface and 6,000 feet.