Observed Canadian fire danger indexes

Updated 13:00 2017-07-21

**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 82 63 0.0 6 88.0 51.2 361.4 5.2 75.6 17.3
Albert Lea 68 94 0.87 12 22.4 6.9 97.7 0.0 11.7 0.0
Badoura 85 48 0.0 8 91.0 52.1 341.1 9.5 75.4 26.4
Baudette 81 46 0.0 6 89.2 43.4 246.4 6.2 60.3 17.4
Bemidji 85 43 0.0 14 90.1 22.7 241.1 13.6 36.7 23.8
Bigstone 84 81 0.0 7 67.6 7.7 232.1 1.0 14.3 0.8
Brainerd 83 60 0.0 11 86.9 23.8 286.5 6.7 39.4 14.6
Camp Ripley/Little Falls 81 71 0.0 12 84.3 16.3 92.4 5.1 22.7 8.6
Carlos Avery 73 85 0.0 4 82.6 20.3 213.9 2.1 32.9 4.8
Cass Lake 84 45 0.0 11 89.6 27.9 339.5 9.9 46.3 21.3
Cutfoot 84 51 0.0 4 88.4 35.5 363.0 4.7 57.0 13.7
Detroit Lakes 84 65 0.0 8 88.0 32.9 264.6 6.1 50.2 15.5
Effie 82 60 0.0 5 86.9 20.1 300.7 4.1 34.5 9.2
Ely 77 53 0.0 6 88.6 24.7 179.9 5.7 36.8 12.5
Fernberg 74 55 0.0 7 87.9 18.3 110.9 5.6 25.9 10.1
Grand Portage 71 64 0.0 3 87.5 22.0 100.7 3.8 28.5 7.6
Hibbing 82 59 0.0 7 88.8 33.3 233.1 6.4 49.1 15.9
Hill City 83 53 0.0 8 88.9 34.0 246.6 7.1 50.6 17.4
Isabella 77 51 0.0 3 89.1 27.2 143.0 4.8 36.9 10.9
Itasca 85 55 0.0 8 89.7 50.3 360.7 7.9 74.6 23.1
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Kelliher 85 48 0.0 8 89.3 53.4 421.5 7.4 81.1 23.0
Kittson 76 84 0.02 7 83.1 33.7 374.7 2.9 55.0 9.0
Litchfield 81 75 0.0 13 83.6 51.2 329.2 5.0 73.7 16.5
Littlefork 75 60 0.0 6 87.9 28.0 231.6 5.2 43.1 12.5
Meander USFS 78 53 0.0 2 87.4 20.2 185.7 3.5 31.8 7.6
MN Valley 77 84 0.01 5 64.1 8.7 74.9 0.8 13.5 0.5
Moose Lake 80 63 0.0 4 85.7 15.7 88.1 3.2 21.7 5.5
Mora 81 61 0.0 10 86.4 18.0 81.3 5.8 23.2 9.8
New Ulm Municipal Airport 75 89 0.43 12 38.8 7.3 177.8 0.1 13.2 0.0
Orr 78 57 0.0 5 88.4 30.3 198.0 5.1 43.8 12.6
Redstn 82 83 0.2 4 48.8 15.2 256.6 0.2 26.5 0.2
Rice Lake 81 62 0.0 10 86.2 18.7 159.1 5.6 28.9 10.7
Rochester 69 94 0.27 7 24.4 5.7 175.2 0.0 10.5 0.0
Roseau 77 61 0.01 5 87.8 35.7 254.4 4.7 52.8 13.1
Saginaw 76 72 0.0 6 85.8 21.8 141.2 3.8 31.4 8.2
Seagull Lake 74 61 0.01 1 87.7 20.6 81.3 3.4 25.3 6.3
Sherburne 79 71 0.0 9 84.0 16.5 164.0 3.8 26.3 7.3
Skibo 81 55 0.0 4 88.2 24.2 191.0 4.6 36.7 10.4
Stanton Airfield 72 87 0.05 9 61.0 23.6 273.3 0.9 38.8 1.9
St. Croix 84 65 0.0 6 86.0 18.8 116.9 4.0 26.8 7.6
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Superior #1 73 57 0.0 2 88.3 28.5 130.4 4.0 36.9 9.2
Superior #2 84 54 0.0 3 88.1 26.4 187.1 4.2 39.1 10.0
Superior #3 78 58 0.0 3 86.5 14.7 82.3 3.3 20.4 5.4
Voyageurs/Kabnam 72 63 0.0 4 87.3 26.8 190.9 4.0 39.7 9.8

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.