Fire Danger Pocket Card

Lolo National Forest

Dept. of Natural Resources and Conservaation - SWLO

East - Fire Danger Rating Area

FIRE DANGER INTERPRETATION
Adjective	Index Range	Staffing Level	Dispatch Level	Historic Large Fire Occurrence
Extreme	ERC 64+	5	3 - High (BI 50+)	36%
Very High	ERC 54-63	4		39%
High	ERC 40-53	3	2 - MOD (BI 30-49)	17%
Moderate	ERC 27-39	2	1 - Low (0-29)	6%
Low	ERC 0-26	1		2%
Fire Danger - Lolo DNRC East (1999-2013)
Maximum	Highest Energy Release Component by day
Average	Mean Energy Release Component by day
90th Percentile	Only 10% of days had an Energy Release Component above this level
Large Fire	A fire with a final size of more than 100 acres

	East Lolo NF - DNRC Southwestern Land Office
	Fire Weather Zone: 108
	SIG: EASTFDRA - Ninemile, Seeley Lake, Blue Mountain (equal weighting)
	*All stations on this card comply with NWCG weather standards

REMEMBER - What Fire Danger tells you:
Energy Release Component gives seasonal trends calculated from 1400 temperature and humidity, daily min / max temperature & RH, and daily precipitation duration Wind is NOT part of the ERC calculation but it is included in the Burning Index Pay attention to local conditions and variations across the landscape; fuel, weather, topography Listen to weather forecasts, especailly WIND Drainages may be susecptible to local winds and potential microbursts Fire Danger is calculated for the lowest and driest part of the zone (worst case)
LOCAL THRESHOLDS - historically large fires have occurred under the following conditions:
Relative Humidity less than 25% Temperatures greater than 80 degrees 20-foot Wind Speeds Greater than 10 miles per hour 1000-hour fuel moisture less than 12%
WATCH OUT - when dry fuels are combined with any of the following:
Alignment of wind and slope Haines Index of 5 or 6 Dry Cold Front Passage - Strong winds combined with Low Relative Humidity