Event (18) Flank becomes headfire.

Air Observer or Field Observer

Image: Daedalus linescan, NSWRFS & Air Target Services Pty Ltd.

This image shows the eastern fire of the Pilliga Complex 30 November 2006 at noon. After long, narrow run to the NE, it has been hit by a SE wind change, and run for a similar distance in the new direction before decaying into fingers. Note the automatic headfire widening after the wind change. Note also some minor flank outbreaks near the origin.

Implications

Phenomenon	Urgency	Indicated Red Flag Warning
Dynamic channelling	?	6) Channelling event
Deep flaming zone	?	2) Conditions conducive to plume-driven fire
Wind Change at Fire	1	5) Wind change
Convergence Zone	?	????

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This material arises from work carried out by the HighFire Risk Project.

Material prepared by R. McRae September 2009.