Observed Canadian fire danger indexes

Updated 13:00 2016-09-29

**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 64 51 0.0 8 83.7 11.0 156.3 3.4 18.8 5.3
Albert Lea 64 56 0.0 10 86.0 14.0 104.7 5.6 21.0 9.0
Badoura 60 58 0.0 2 84.0 26.3 106.9 2.2 32.6 4.8
Baudette 61 55 0.0 4 72.6 3.9 48.1 0.9 6.5 0.5
Bemidji 60 58 0.0 7 78.2 11.9 184.2 1.7 20.6 2.6
Bigstone 65 57 0.0 5 85.6 10.7 179.1 3.4 18.6 5.4
Brainerd 60 59 0.0 6 82.1 12.1 126.1 2.3 19.5 3.7
Camp Ripley/Little Falls 60 62 0.0 5 82.0 10.3 136.1 2.1 17.4 3.0
Carlos Avery 62 64 0.0 5 79.7 7.1 27.4 1.6 8.6 0.9
Cass Lake 60 56 0.01 4 73.3 12.1 218.0 1.0 21.3 0.9
Cutfoot 59 64 0.0 0 57.0 8.3 91.2 0.3 13.6 0.2
Detroit Lakes 64 51 0.0 8 85.7 15.8 139.2 4.4 24.7 8.0
Effie 58 62 0.0 4 68.3 4.9 146.3 0.8 9.0 0.5
Ely 57 67 0.0 2 59.9 3.2 106.2 0.5 5.9 0.2
Fernberg 56 67 0.0 3 52.0 1.8 203.6 0.3 3.6 0.1
Grand Portage 60 66 0.0 3 64.3 2.2 101.8 0.7 4.2 0.3
Hibbing 59 64 0.0 2 70.4 4.3 33.7 0.7 6.6 0.4
Hill City 58 71 0.0 2 65.0 4.2 119.5 0.6 7.7 0.3
Isabella 56 67 0.0 1 45.2 1.4 52.1 0.1 2.7 0.0
Itasca 60 54 0.0 4 82.0 12.4 251.4 2.0 22.0 3.3
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Kelliher 60 60 0.0 4 67.7 3.7 141.5 0.8 6.9 0.4
Kittson 64 50 0.0 8 83.4 9.1 126.3 3.3 15.4 4.5
Litchfield 62 60 0.0 9 86.5 8.5 23.7 5.4 8.9 5.5
Littlefork 59 65 0.0 3 57.9 2.5 101.4 0.5 4.7 0.2
Meander USFS 55 77 0.0 1 43.0 2.7 32.7 0.1 4.4 0.0
MN Valley 65 57 0.0 5 85.8 9.5 29.5 3.6 10.5 3.9
Moose Lake 61 67 0.0 8 74.2 5.3 134.8 1.4 9.7 0.8
Mora 61 68 0.0 6 74.1 4.4 66.4 1.2 7.5 0.6
New Ulm Municipal Airport 62 59 0.0 3 86.1 16.9 108.4 3.3 24.3 6.0
Orr 57 68 0.0 3 61.3 4.1 28.4 0.6 6.0 0.3
Redstn 65 54 0.0 3 86.2 14.6 167.2 3.2 24.0 5.8
Rice Lake 59 68 0.0 6 71.1 4.0 110.8 1.1 7.4 0.5
Rochester 62 72 0.0 8 83.0 8.1 36.7 3.1 10.4 3.3
Roseau 63 52 0.0 7 83.0 8.6 164.1 2.8 15.2 3.8
Saginaw 58 67 0.0 6 72.2 5.9 217.1 1.1 11.1 0.7
Seagull Lake 58 65 0.0 2 56.3 2.6 179.7 0.4 5.0 0.2
Sherburne 63 60 0.0 5 81.9 7.0 39.2 2.1 9.7 1.8
Skibo 58 60 0.0 2 60.1 3.0 101.1 0.5 5.6 0.2
St. Croix 62 61 0.0 5 73.3 6.9 99.8 1.1 11.8 0.7
Superior #1 57 72 0.0 1 31.5 1.0 161.8 0.0 2.1 0.0
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Superior #2 56 69 0.0 3 53.6 3.1 79.4 0.3 5.6 0.1
Superior #3 58 69 0.0 3 54.9 2.9 182.5 0.4 5.5 0.2
Voyageurs/Kabnam 58 74 0.0 2 53.2 2.5 11.6 0.3 3.3 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.