Observed Canadian fire danger indexes

Updated 13:00 2016-06-26

**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 69 64 0.0 16 76.1 11.9 65.1 3.0 16.3 4.3
Albert Lea 82 35 0.89 9 76.8 18.3 59.7 1.8 20.7 2.8
Badoura 76 45 0.0 13 88.5 24.5 221.7 9.9 38.4 19.3
Baudette 70 64 0.36 13 59.6 5.5 7.2 1.1 5.2 0.5
Bemidji 73 54 0.0 14 87.1 25.0 217.6 8.8 38.8 17.8
Bigstone 84 32 0.0 17 92.1 78.9 357.5 22.8 101.7 54.0
Brainerd 79 44 0.62 19 77.6 15.2 67.4 4.3 19.4 6.7
Camp Ripley/Little Falls 81 38 0.07 16 87.9 42.0 202.3 11.6 55.3 26.0
Carlos Avery 81 41 0.25 12 79.8 15.4 114.6 3.0 23.0 5.3
Cass Lake 74 51 0.0 14 87.6 23.6 200.0 9.4 36.4 18.2
Cutfoot 76 50 0.2 6 72.2 16.5 153.3 1.1 26.0 1.6
Detroit Lakes 77 44 0.0 21 89.2 34.2 199.0 20.9 47.9 36.0
Effie 72 56 0.03 9 84.8 24.9 169.5 4.3 36.4 9.7
Ely 74 52 0.12 20 78.2 14.9 146.3 4.9 23.8 8.5
Fernberg 74 55 0.09 7 71.2 17.2 157.1 1.1 27.1 1.9
Grand Portage 72 57 0.22 11 57.9 7.3 16.8 0.9 7.3 0.4
Hibbing 74 52 0.34 18 70.5 7.4 68.9 2.7 11.7 3.1
Hill City 77 49 0.99 10 68.1 9.8 69.1 1.3 14.5 1.0
Isabella 74 49 0.1 7 74.2 15.7 120.2 1.3 23.6 2.0
Itasca 75 52 0.0 11 87.6 24.7 184.1 7.4 36.9 15.3
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Kelliher 71 59 0.03 14 81.9 23.7 244.1 4.4 38.1 10.2
Kittson 67 81 0.0 6 83.4 16.6 54.1 2.8 18.8 4.3
Litchfield 82 42 0.06 15 87.6 28.1 57.0 10.3 28.0 16.9
Littlefork 71 64 0.41 11 56.8 6.2 78.5 0.8 10.4 0.5
Meander USFS 70 59 0.17 6 60.5 9.5 80.8 0.7 14.7 0.5
MNS #1 78 47 0.54 13 73.6 17.6 152.1 2.1 27.3 4.0
MN Valley 83 34 0.0 15 91.4 35.7 229.1 17.7 51.4 33.4
Moose Lake 77 49 2.3 18 72.2 12.2 20.8 2.9 12.0 3.4
Mora 80 45 0.62 16 76.7 17.3 215.2 3.1 28.8 6.4
New Ulm Municipal Airport 82 33 0.0 18 91.8 29.6 59.5 24.5 29.5 32.1
Orr 71 59 0.12 7 65.0 11.1 138.1 0.9 18.5 0.8
Redstn 80 45 0.13 13 82.2 21.7 140.2 4.2 31.2 8.8
Rice Lake 78 47 2.71 13 70.7 12.1 8.0 1.8 11.5 1.7
Rochester 81 49 0.33 17 78.0 9.9 40.1 3.8 12.3 4.6
Roseau 61 85 0.09 17 64.8 10.9 55.3 2.1 14.6 2.5
Saginaw 76 52 0.37 11 70.8 13.8 120.3 1.6 21.5 2.4
Seagull Lake 75 51 0.09 15 75.7 12.2 50.6 2.7 15.2 3.6
Sherburne 80 46 0.13 12 81.7 19.1 171.7 3.6 29.9 7.5
Skibo 75 50 0.09 6 73.1 10.5 92.9 1.1 16.3 0.9
Stanton Airfield 82 33 0.0 16 91.5 34.7 194.1 19.7 48.0 34.7
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
St. Croix 80 45 0.89 10 72.4 17.1 154.6 1.5 26.8 2.8
Superior #1 74 47 0.1 9 79.6 31.1 83.5 2.3 32.2 5.0
Superior #2 73 58 0.68 7 54.9 8.3 90.0 0.5 13.4 0.3
Voyageurs/Kabnam 69 65 0.07 6 65.1 10.3 66.8 0.9 14.9 0.7

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.