FIRE BEHAVIOR AND TACTICSLive Fuel Moisture
181%-& Above - Fires will exhibit VERY LOW BEHAVIOR with difficulty burning.
Residual fine fuels from the previous year may carry the fire. Foliage will remain
on the stems following the burn. Fires can generally be attacked at the head or flanks by persons
using hand tools. Hand line should hold fire without any problems. Fires will
normally go out as soon as wind dies down.
151%-180% - Fires will exhibit LOW FIRE BEHAVIOR with fire beginning to be carried
in the live fuels. Both foliage and stem material up to 1/4 inch in diameter will be
consumed by the fire. Burns will be generally patchy with many unburned islands. Engines may
be necessary to catch fires at the head and handling will be more difficult to
construct, but should hold at the head and the flanks.
126%-150% - Fires will exhibit MODERATE FIRE BEHAVIOR with a fast continuous
rate of spread that will consume stem material up to 2 inches in diameter. These
fires may be attacked at the head with engines but may require support of dozers and retardant
aircraft. Handline will become ineffective at the fire head, but should still hold at
the flanks. Under high winds and low humidity, indirect line should be given
considerations.
101%-125% - Fires will exhibit HIGH FIRE BEHAVIOR leaving no material unburned. Head attack with fire engines and dozers will be nearly impossible on large fires, but may still be possible on smaller, developing fires. Retardant aircraft will be necessary on all these fires. Flanking attack by engines and indirect attack ahead of the fire must be used. Spotting should be anticipated. Fires will begin to burn through the night, calming down several hours before sunrise.
75%-100% - Fires will exhibit EXTREME FIRE BEHAVIOR. Extreme rates of spread and
moderate to long range spotting will occur. Engines and dozers may be best used
to back up firing operations, and to protect structures. Indirect attack must be used to control
these fires. Fires will burn actively through the night. Air turbulence caused
by the fire will cause problems for air operations.
74%-&BELOW - Fires will have ADVANCED FIRE BEHAVIOR with high potential to
control their environment. Large acreage will be consumed in a very short
time period. Backfiring from indirect line, roads, etc. must be considered. Aircraft will need to
be cautious of hazardous turbulence around the fire.
LIVE FUEL MOISTURE PROJECT | LIVE FUEL | 1000-HOUR | PINYON PINE PRECIPITATION | SAMPLE SCHEDULE | LIVE FUEL MOISTURE SITES
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