WILDFIRE: LATEST LEARNINGS- v01.6

WILDFIRE: LATEST LEARNINGS

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General learning outcome:

SPECIFIC HIGH COUNTRY WEATHER:

Specific learning outcome:

Subsidence inversions and nocturnal low-level jets can invert the diurnal weather cycle.

Topic:

The formation of a subsidence inversion and its potential impacts on surface fire weather.

Expert Awareness for Advanced Firefighters & Fire Behaviour Analysts


The prerequisite conditions for a subsidence inversion are:
  • Generally dry, fine weather.
  • Approaching high pressure system.
  • Terrain above c.1500m ASL.
Confirming their onset requires monitoring BoM AWS data feeds. Due to the imprecision of the “1500m ASL” parameter, there may be a need to install an AWS near the fireground to be sure of onset.
Consideration may be given to issuing watchouts or Red Flag Warnings (Dew point depression event).
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This website is dedicated to bringing forward the latest research findings. They are provided to allow firefighters to be made aware of critical safety issues ahead of the material being included in the national training curriculum.
Material prepared by Rick McRae for AFAC Research Dissemination Pilot Study, March 2012.