Observed Canadian fire danger indexes

Updated 13:00 2016-08-23

**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 78 67 0.0 8 86.9 31.6 222.5 5.3 46.7 13.3
Albert Lea 80 66 0.0 12 85.8 9.2 123.2 6.0 15.5 8.1
Badoura 84 57 0.0 8 87.6 29.0 160.5 5.8 39.9 13.1
Baudette 80 63 0.0 8 87.8 18.2 113.6 6.0 26.0 10.7
Bemidji 83 58 0.0 12 87.1 16.0 142.1 7.5 24.9 12.5
Bigstone 84 60 0.0 13 86.9 13.2 134.8 7.9 21.2 12.0
Brainerd 81 61 0.0 12 88.3 57.8 271.4 8.9 75.4 25.2
Camp Ripley/Little Falls 82 61 0.0 13 86.8 13.0 67.3 7.7 17.6 10.7
Carlos Avery 82 61 0.0 9 86.7 11.7 39.7 5.6 13.5 7.0
Cass Lake 81 57 0.0 12 86.6 13.6 173.8 6.9 22.8 11.2
Cutfoot 82 61 0.0 4 85.3 13.7 92.7 3.0 20.0 4.9
Detroit Lakes 82 57 0.0 15 87.3 23.5 143.8 9.8 33.3 17.9
Effie 79 64 0.0 10 85.8 20.0 212.7 5.3 32.4 10.9
Ely 80 58 0.0 9 86.8 27.5 267.9 5.6 43.8 13.5
Fernberg 82 52 0.0 9 88.3 32.9 329.2 7.0 52.6 17.6
Grand Portage 73 68 0.0 8 80.3 15.1 158.1 2.2 24.3 4.1
Hibbing 82 58 0.0 9 88.3 34.3 151.1 7.0 43.8 16.0
Hill City 80 62 0.0 12 87.5 26.8 88.7 8.0 30.5 14.6
Isabella 78 62 0.0 6 85.2 15.9 202.0 3.5 26.6 6.8
Itasca 83 56 0.0 9 87.6 32.3 223.8 6.3 47.4 15.5
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Kelliher 80 63 0.0 10 86.9 24.2 213.3 6.2 37.7 13.5
Kittson 81 58 0.0 12 87.3 31.8 170.3 7.8 43.3 17.2
Litchfield 81 69 0.0 15 86.2 13.7 73.6 8.5 18.7 11.9
Littlefork 78 65 0.0 10 87.4 26.1 208.6 6.6 39.8 14.6
Meander USFS 79 61 0.0 5 86.4 28.7 227.7 3.9 43.6 9.9
MNS #1 80 64 0.0 6 85.0 9.4 25.2 3.4 9.7 3.6
MN Valley 83 65 0.0 9 85.9 8.1 37.0 5.0 10.5 5.5
Moose Lake 82 61 0.0 6 86.4 12.0 142.1 4.2 19.9 6.7
Mora 82 60 0.0 10 86.7 9.9 35.6 6.0 11.7 7.0
New Ulm Municipal Airport 78 74 0.0 18 85.7 12.2 92.2 10.3 18.3 13.8
Orr 78 65 0.0 9 86.0 17.7 151.2 5.1 27.4 9.6
Redstn 74 80 0.0 5 84.1 11.0 162.8 2.8 18.8 4.3
Rice Lake 81 63 0.0 10 85.8 13.5 138.9 5.3 21.7 8.7
Rochester 78 65 0.0 22 85.6 9.3 42.3 13.4 12.0 13.9
Roseau 82 56 0.0 16 88.1 34.9 239.2 12.0 51.2 25.6
Saginaw 81 59 0.0 7 87.3 26.7 257.7 5.2 42.4 12.4
Seagull Lake 82 58 0.0 4 83.9 19.8 227.0 2.5 32.5 5.6
Sherburne 82 60 0.0 9 86.9 15.7 155.2 5.7 25.0 10.0
Skibo 81 58 0.0 6 86.9 25.2 229.1 4.4 39.5 10.5
Stanton Airfield 80 66 0.0 14 87.4 97.5 568.5 9.1 136.5 33.4
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
St. Croix 83 57 0.0 7 87.3 12.1 70.2 5.1 16.9 7.4
Superior #1 78 64 0.0 4 82.0 18.5 250.9 2.0 31.2 4.3
Superior #2 80 60 0.0 5 88.4 36.9 227.4 5.1 52.5 13.8
Voyageurs/Kabnam 78 63 0.0 5 85.4 17.9 103.1 3.3 25.0 6.2

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.