Observed Canadian fire danger indexes

Updated 13:00 2016-08-29

**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 76 79 0.0 8 73.8 16.5 205.6 1.4 27.5 2.5
Albert Lea 82 74 0.0 6 83.2 11.2 84.3 2.6 16.9 3.8
Badoura 81 67 0.76 8 61.9 17.5 158.5 0.9 27.5 1.0
Baudette 76 73 2.07 8 44.7 4.2 27.3 0.2 6.1 0.1
Bemidji 80 70 0.13 7 68.1 13.2 170.3 1.0 22.1 1.0
Bigstone 83 71 0.0 11 80.4 13.4 159.3 2.9 22.1 5.0
Brainerd 80 62 0.51 11 68.0 12.6 85.9 1.4 18.5 1.8
Camp Ripley/Little Falls 83 63 0.53 6 63.9 12.7 86.6 0.8 18.6 0.7
Carlos Avery 83 63 0.01 10 78.7 12.4 71.8 2.2 17.4 3.2
Cass Lake 80 67 0.82 7 56.6 7.6 154.5 0.6 13.6 0.4
Cutfoot 80 69 2.29 3 43.4 5.4 7.8 0.1 5.2 0.0
Detroit Lakes 81 71 1.83 7 54.8 9.8 80.5 0.5 15.0 0.4
Effie 78 70 1.26 9 52.6 6.8 140.3 0.5 12.1 0.3
Ely 76 66 1.49 7 50.6 8.0 179.5 0.3 14.4 0.2
Fernberg 75 64 0.7 8 57.3 13.9 303.0 0.6 24.9 0.7
Grand Portage 75 78 0.07 3 66.4 17.5 199.3 0.7 28.7 0.8
Hibbing 76 69 2.62 11 53.2 8.8 31.4 0.6 10.4 0.4
Hill City 80 60 0.52 7 65.4 18.9 106.2 0.9 26.2 1.1
Isabella 75 62 0.46 4 57.8 10.8 206.8 0.5 19.1 0.4
Itasca 79 71 1.12 5 50.5 11.3 179.2 0.3 19.5 0.2
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Kelliher 74 76 1.95 10 46.1 6.7 115.4 0.2 11.7 0.1
Kittson 77 68 0.03 4 83.2 42.7 211.7 2.3 56.8 7.4
Litchfield 82 72 0.0 14 83.3 17.7 112.9 5.2 25.4 9.4
Littlefork 78 69 2.03 7 48.5 7.2 95.9 0.2 12.2 0.2
Meander USFS 77 67 1.94 4 44.0 5.9 106.2 0.1 10.3 0.1
MNS #1 81 67 0.72 4 54.7 8.5 37.2 0.4 10.8 0.2
MN Valley 82 66 0.0 7 83.5 10.5 54.8 3.0 14.2 4.0
Moose Lake 79 68 0.31 5 61.1 13.2 169.1 0.7 22.1 0.6
Mora 84 62 0.13 9 75.9 13.0 75.7 1.7 18.2 2.3
New Ulm Municipal Airport 78 79 0.0 10 80.9 9.6 105.7 2.9 15.6 4.0
Orr 78 71 2.49 5 44.6 6.7 44.6 0.1 9.7 0.1
Redstn 83 66 0.0 4 82.4 10.5 167.9 2.1 18.1 3.0
Rice Lake 78 68 0.45 7 60.6 12.8 157.5 0.7 21.2 0.7
Rochester 82 66 0.0 0 84.5 12.2 50.1 2.0 15.1 2.4
Roseau 76 70 0.13 11 69.4 18.7 251.3 1.5 31.5 3.1
Saginaw 77 68 0.62 5 54.0 15.5 254.3 0.4 26.8 0.4
Seagull Lake 79 60 0.51 4 60.9 16.1 235.8 0.6 27.5 0.7
Sherburne 85 63 0.0 9 82.8 20.7 194.1 3.3 32.7 7.2
Skibo 76 66 1.34 4 50.7 12.2 178.6 0.2 20.8 0.2
Stanton Airfield 78 74 0.0 8 85.6 107.0 611.6 4.4 148.8 21.0
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
St. Croix 85 55 0.02 6 84.5 16.8 109.4 3.2 24.3 5.9
Superior #1 75 68 0.29 3 57.2 17.6 273.7 0.4 30.3 0.5
Superior #2 77 68 1.86 3 41.6 8.2 125.8 0.1 14.1 0.0
Superior #3 77 70 0.85 2 42.2 10.6 255.6 0.1 19.2 0.1
Voyageurs/Kabnam 79 65 1.13 5 50.0 6.3 51.2 0.2 9.7 0.1

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.