Observed Canadian fire danger indexes

Updated 13:00 2017-09-23

**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 54 88 0.2 7 44.6 10.3 372.3 0.1 19.3 0.1
Albert Lea 84 66 0.0 3 87.8 16.7 237.2 4.1 28.4 8.2
Badoura 58 92 0.73 5 24.4 3.8 147.4 0.0 7.1 0.0
Baudette 56 89 1.24 4 23.9 5.4 163.7 0.0 10.0 0.0
Bemidji 54 95 0.03 6 75.7 12.9 288.4 1.3 23.2 1.9
Bigstone 57 92 0.27 6 35.7 11.5 218.4 0.0 20.4 0.0
Brainerd 67 84 0.26 8 42.5 3.7 130.4 0.1 6.9 0.1
Camp Ripley/Little Falls 71 81 0.06 5 65.3 6.6 80.8 0.8 11.0 0.5
Carlos Avery 86 61 0.0 7 87.0 23.5 307.8 4.9 39.4 11.5
Cass Lake 55 94 0.11 4 50.6 8.0 255.1 0.2 14.9 0.2
Cutfoot 56 95 0.08 1 56.6 8.1 254.5 0.3 15.0 0.3
Detroit Lakes 52 99 0.07 6 60.1 15.4 170.8 0.7 25.2 0.7
Effie 58 94 0.06 4 67.0 9.3 203.4 0.8 16.6 0.6
Ely 67 87 0.08 7 55.1 3.5 69.7 0.5 6.1 0.2
Fernberg 70 84 0.05 8 65.0 4.6 133.3 1.0 8.5 0.6
Grand Portage 80 67 0.19 5 51.2 1.6 51.6 0.3 3.0 0.1
Hibbing 71 83 0.15 10 59.5 4.7 28.5 0.9 6.6 0.4
Hill City 65 89 0.2 4 30.8 2.8 52.4 0.0 5.0 0.0
Isabella 77 68 0.04 5 73.6 4.6 83.3 1.1 8.1 0.6
Itasca 53 97 0.03 3 75.7 14.2 288.3 1.0 25.2 1.3
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Kelliher 57 88 0.01 5 81.0 10.7 311.1 1.9 19.7 2.9
Kittson 60 77 0.11 8 56.8 11.2 291.9 0.6 20.4 0.6
Litchfield 79 72 0.0 5 86.1 24.0 177.3 3.7 35.8 8.5
Littlefork 58 91 0.07 5 52.0 4.8 222.2 0.3 9.1 0.2
Meander USFS 69 76 0.0 2 84.5 8.6 116.5 2.3 14.6 2.9
MN Valley 83 63 0.0 8 88.1 18.7 190.3 6.3 30.1 12.0
Moose Lake 83 69 0.0 7 67.8 8.1 135.8 1.0 14.1 0.8
Mora 83 69 0.0 6 80.8 10.4 144.1 2.0 17.7 2.8
New Ulm Municipal Airport 80 62 0.0 10 87.2 18.1 211.4 6.7 29.8 12.6
Orr 61 90 0.01 2 81.3 9.1 115.7 1.6 15.2 1.7
Redstn 73 87 0.0 1 82.7 21.4 253.4 1.7 35.3 4.0
Rice Lake 79 71 0.0 6 72.5 8.7 230.7 1.1 15.9 0.9
Rochester 87 55 0.0 8 89.8 13.2 264.5 8.1 23.5 12.9
Roseau 55 90 0.07 7 65.3 12.5 224.7 0.9 21.9 0.9
Saginaw 83 66 0.02 5 73.2 8.6 129.5 1.1 14.7 0.8
Seagull Lake 73 77 0.02 8 71.5 4.2 69.9 1.3 7.3 0.6
Sherburne 83 65 0.0 7 82.1 13.3 211.4 2.5 23.0 4.5
Skibo 80 67 0.04 4 77.7 6.8 45.8 1.3 10.0 0.8
Stanton Airfield 85 59 0.0 10 88.1 17.3 310.0 7.6 30.4 14.1
St. Croix 85 61 0.0 5 78.2 8.2 115.2 1.4 14.0 1.2
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Superior #1 77 69 0.01 5 79.5 5.6 127.8 1.6 10.2 1.0
Superior #2 64 96 0.26 2 26.9 3.7 121.6 0.0 6.8 0.0
Superior #3 67 85 0.08 2 55.4 3.5 110.3 0.3 6.5 0.2
Voyageurs/Kabnam 58 90 0.03 5 45.7 2.8 93.7 0.1 5.2 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.