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We conclude that HRV did form during an intense Montana wildland fire on a mountain face that was observed by the junior author. This article describes the phenomenon.
Person:
Year: 1990
Type: Document
Source: TTRS
Topic(s): Emissions and Smoke, Fire Behavior, Fire History, Fuels, Intelligence, Logistics, Models, Weather
Region(s): Northern Rockies
Keywords: crown fires, fire case histories, fire control, fire equipment, fire intensity, fire management, fire whirls, flame length, fuel models, grass fuels, Montana, Pinus contorta, Pseudotsuga menziesii, rate of spread, spot fires, topography, US Forest Service, vortices, wildfires, wind

A detailed set of data was compiled on 20 large fire whirlwinds observed at 27 prescribed burns conducted in Ontario. There appear to be two types of such whirlwinds: one occurs in pairs on the leeward side of the convection column and the other is created after the entireā€¦
Person:
Year: 1990
Type: Document
Source: FRAMES, TTRS
Topic(s): Administration, Aviation, Emissions and Smoke, Fire Behavior, Fire History, Fuels, Hazard and Risk, Intelligence, Logistics, Planning, Prescribed Fire, Weather
Region(s): International
Keywords: Canada, fire intensity, black spruce, Picea mariana, fire whirls, aerial ignition, convection, duff, energy, fire case histories, fire control, fire danger rating, fire equipment, fire management planning, fire size, fire weather, fire whirls, forest management, fuel loading, ignition, logging, rate of spread, size classes, slash, smoke behavior, storms, temperature, vortices, weather observations, wind