Observed Canadian fire danger indexes

Updated 12:00 2016-02-06

**Local agency personnel should contact MIFC Fire Intelligence if errors or omissions are observed.**

Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Agassiz 30 86 0.0 10 76.4 0.1 207.1 1.9 0.2 0.4
Albert Lea 28 100 0.0 9 62.0 0.0 125.7 1.0 0.0 0.2
Badoura 37 60 0.0 6 81.6 0.7 118.8 2.2 1.4 0.6
Baudette 32 64 0.01 7 79.9 0.1 156.7 2.0 0.1 0.4
Bemidji 34 66 0.01 6 80.8 0.4 88.1 2.0 0.8 0.5
Bigstone 41 56 0.0 6 81.7 2.2 179.1 2.2 4.2 0.9
Brainerd 35 66 0.0 9 79.5 0.3 40.2 2.2 0.7 0.5
Camp Ripley/Little Falls 36 61 0.0 13 78.2 0.3 62.2 2.7 0.6 0.7
Carlos Avery 35 68 0.01 10 74.4 0.5 1.3 1.7 0.5 0.4
Cass Lake 33 69 0.0 6 81.7 0.7 46.5 2.2 1.3 0.6
Cutfoot 34 64 0.02 4 72.4 0.1 0.0 0.9 0.0 0.2
Effie 31 65 0.0 8 78.7 0.1 31.6 1.9 0.3 0.4
Ely 27 68 0.0 7 81.2 0.3 62.3 2.3 0.6 0.6
Fernberg 26 72 0.0 6 70.4 0.0 74.1 1.0 0.0 0.2
Grand Portage 26 69 0.0 4 75.7 0.3 0.5 1.1 0.1 0.2
Hibbing 30 67 0.0 7 79.7 0.1 0.5 1.9 0.1 0.4
Itasca 35 64 0.0 5 81.0 0.6 40.8 1.9 1.2 0.5
Kelliher 35 59 0.01 7 81.0 0.4 85.7 2.2 0.7 0.6
Kittson 28 80 0.01 12 78.3 0.1 146.0 2.5 0.2 0.6
Litchfield 35 69 0.0 14 80.6 0.5 85.8 3.8 1.0 1.0
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Littlefork 30 68 0.0 5 78.0 0.1 44.0 1.4 0.2 0.3
Meander USFS 28 68 0.0 3 67.7 0.0 0.0 0.7 0.0 0.1
MN Valley 34 74 0.0 11 80.0 0.7 7.4 2.8 1.1 0.7
Moose Lake 35 62 0.0 7 82.3 0.8 15.5 2.6 1.5 0.7
Mora 34 71 0.0 12 81.5 0.4 3.0 3.6 0.6 0.9
Orr 31 63 0.0 7 78.5 0.1 10.4 1.7 0.2 0.4
Redstn 32 74 0.0 11 78.7 0.5 114.1 2.4 1.1 0.7
Rice Lake 35 63 0.0 9 80.7 0.3 0.4 2.5 0.0 0.5
Rochester 25 92 0.0 16 49.9 0.0 0.0 0.6 0.0 0.1
Roseau 30 74 0.0 12 80.4 0.1 151.1 3.2 0.2 0.7
Saginaw 31 69 0.0 8 79.4 0.2 1.3 2.0 0.3 0.5
Seagull Lake 29 64 0.0 3 79.5 0.2 88.8 1.4 0.4 0.3
Sherburne 32 71 0.0 10 76.9 0.4 9.4 2.0 0.8 0.5
Skibo 32 56 0.0 4
Stanton Airfield 31 80 0.02 9 77.7 0.4 112.5 1.9 0.8 0.5
St. Croix 35 63 0.0 8 81.9 0.8 1.3 2.7 0.6 0.7
Voyageurs/Kabnam 27 66 0.01 5 72.4 0.0 0.0 1.0 0.0 0.2

Interpretation

The following chart is a statewide generalized fire danger rating chart for the Canadian Fire Weather Index. It is based on a five class danger rating system, i.e., low, moderate, high, very high , and extreme. The distribution is based on weather records from 1985 - 1998. Low days occurred 45% to 50% of the time, moderate - 30 %, high days - 12% to 15%, very high days occurred 7%-8% of the time, and extreme days were 2%-3%. This is not meant to be used as a staffing guide . Each area needs to look at its own weather data coupled with its fire occurrence data. For instance, if you have a drought code of 380, it does not mean you are in extreme fire danger. It means that the drought code only gets that high on 2% of the days between April 1 and November 1.

Index Low Moderate High Very High Extreme

FFMC

0.0 - 80.9

81.0 - 87.9

88.0 - 90.4

90.5 - 92.4

92.5+

DMC

0.0 - 12.9

13.0 - 27.9

28.0 - 41.9

42.0 - 62.9

63.0+

DC

0.0 - 79.9

80.0 - 209.9

210.0 - 273.9

274.0 - 359.9

360.0+

ISI

0.0 - 3.9

4.0 - 7.9

8.0 - 10.9

11.0 - 18.9

19.0+

BUI

0.0 - 18.9

19.0 - 33.9

34.0 - 53.9

54.0 - 76.9

77.0+

FWI

0.0 - 4.9

5.0 - 13.9

14.0 - 20.9

21.0 - 32.9

33.0+

Definitions

Fine Fuel Moisture Code (FFMC)

This provides a relative indicator of the moisture in the fine fuels. Like the 1 hour fuel moisture, it reacts directly with the air temperature and relative humidity.

Duff Moisture Code (DMC)

This is an index of the moisture of the loosely compact organic layers at a depth of 2-4 inches.

Drought Code (DC)

This measures long term dryness in the fuels. It is a longer term index than the NFDRS 1000 fuel moisture. It doesn't reflect the probability of fire occurrence by itself, but can be useful in predicting the level of mop up needed and the consumption of large fuels. It should be looked at in relation to peat fire starts.

Initial Spread Index (ISI)

This is based on the FFMC and the wind speed. It provides a relative numerical rating of the expected rate of spread. This is similar to the NFDRS Spread Component.

Buildup Index (BUI)

This index is based on the DC and the DMC. It provides a relative indication of the amount of fuel available for combustion. This is somewhat similar to the NFDRS Energy Release Component. It doesn't predict what a given day might be like, but does relate well to the dryness of the fuels.

Fire Weather Index (FWI)

This combines the BUI and the ISI to give a relative numerical rating of fire intensity. It can be compared to the NFDRS Burning Index.