Observed Canadian fire danger indexes

Updated 13:00 2016-05-03

**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 62 29 0.0 19 91.7 25.1 53.5 25.7 25.0 30.8
Albert Lea 64 34 0.0 13 88.8 26.2 87.3 10.0 29.9 17.2
Badoura 68 27 0.0 14 92.2 26.9 80.1 18.1 29.2 26.0
Baudette 61 27 0.0 13 91.9 32.6 62.8 16.2 32.5 25.3
Bemidji 67 25 0.0 16 92.2 22.8 32.8 21.3 22.5 25.8
Bigstone 70 35 0.0 13 90.7 15.6 34.3 13.7 15.5 15.9
Brainerd 68 37 0.0 14 90.9 23.1 32.4 15.3 22.8 20.6
Camp Ripley/Little Falls 67 37 0.0 14 90.5 17.5 29.5 14.4 17.3 17.4
Carlos Avery 68 29 0.0 13 91.2 16.0 30.4 14.5 15.9 16.8
Cass Lake 66 27 0.0 10 91.7 22.5 32.4 12.4 22.3 17.4
Cutfoot 68 22 0.0 6 92.8 26.0 36.2 10.4 25.7 16.4
Detroit Lakes 69 22 0.0 21 93.1 30.6 55.9 36.3 30.5 42.1
Effie 65 28 0.0 15 91.2 25.6 32.7 17.2 25.2 23.5
Ely 62 35 0.01 12 90.6 21.5 52.5 12.4 21.5 17.2
Fernberg 59 40 0.01 15 89.9 19.1 35.0 14.3 19.0 18.0
Grand Portage 62 42 0.0 7 87.9 16.4 49.3 5.6 17.9 8.3
Hibbing 64 31 0.0 16 90.5 23.3 33.7 16.8 23.1 22.1
Hill City 67 33 0.0 15 90.6 21.9 30.4 15.9 21.6 20.6
Isabella 59 44 0.04 6 84.6 16.8 27.0 3.2 16.6 4.7
Itasca 67 27 0.0 11 92.5 29.4 73.1 14.8 29.4 22.7
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Kelliher 64 27 0.0 14 91.5 27.0 42.4 16.6 26.8 23.5
Kittson 61 26 0.0 20 92.7 27.2 52.9 32.0 27.0 36.8
Litchfield 69 34 0.0 18 90.4 16.3 42.0 19.4 16.5 21.1
Littlefork 63 27 0.0 16 91.3 21.6 34.7 18.9 21.4 23.2
Meander USFS 62 33 0.01 6 91.3 21.5 34.2 8.5 21.3 12.7
MN Valley 69 30 0.0 16 91.1 16.5 31.5 18.5 16.4 20.3
Moose Lake 65 34 0.0 17 90.1 24.6 63.8 17.4 25.0 23.5
Mora 66 37 0.0 16 89.5 20.5 31.6 14.6 20.3 18.8
New Ulm Municipal Airport 66 35 0.0 17 87.8 10.0 18.2 12.7 9.8 12.2
Orr 65 27 0.0 12 91.4 22.7 31.0 13.9 22.4 19.0
Redstn 66 45 0.0 19 86.4 7.8 14.5 12.0 7.7 10.5
Rice Lake 65 36 0.0 13 90.9 22.7 31.1 14.1 22.4 19.2
Rochester 64 40 0.0 25 86.9 11.0 48.3 21.4 14.0 21.1
Roseau 63 25 0.0 16 92.4 27.5 53.8 21.9 27.4 28.8
Saginaw 65 34 0.0 8 89.9 18.8 28.7 8.1 18.5 11.5
Seagull Lake 60 36 0.04 10 86.5 22.2 49.6 5.8 22.1 9.6
Sherburne 68 34 0.0 15 90.3 16.2 32.3 15.1 16.1 17.3
Skibo 62 32 0.01 9 90.7 24.0 46.1 9.9 23.8 15.2
Stanton Airfield 67 33 0.0 15 90.1 28.6 90.8 14.7 32.0 23.4
St. Croix 67 31 0.0 10 90.8 24.0 33.1 10.9 23.7 16.3
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Voyageurs/Kabnam 65 28 0.0 7 91.1 20.9 31.3 8.9 20.6 13.0

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.