Observed Canadian fire danger indexes

Updated 13:00 2016-05-29

**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 63 78 0.24 8 42.1 3.3 56.0 0.1 5.8 0.0
Albert Lea 73 65 0.51 9 49.9 11.4 162.2 0.3 19.4 0.3
Badoura 67 71 0.12 8 64.8 15.9 134.6 1.0 24.5 1.2
Baudette 60 83 0.24 7 40.8 15.2 150.0 0.1 24.3 0.1
Bemidji 63 75 0.07 9 72.2 35.6 151.0 1.4 44.8 3.8
Bigstone 77 52 0.05 9 82.9 56.2 168.0 3.3 61.2 10.7
Brainerd 69 66 0.1 11 61.1 9.5 96.8 1.1 15.3 0.8
Camp Ripley/Little Falls 72 60 0.17 9 64.4 9.0 78.4 1.1 14.0 0.8
Carlos Avery 71 61 0.15 9 61.2 10.9 109.2 0.9 17.5 0.8
Cass Lake 63 77 0.06 9 72.4 46.7 156.2 1.4 53.4 4.5
Cutfoot 63 78 0.03 3 48.2 36.4 162.2 0.2 46.6 0.3
Detroit Lakes 68 65 0.43 12 59.7 14.4 134.9 1.1 22.7 1.2
Effie 62 84 0.23 9 35.0 30.5 155.5 0.0 40.9 0.0
Ely 61 85 0.1 9 37.6 11.8 114.2 0.0 18.8 0.0
Fernberg 60 95 0.23 10 18.5 11.5 111.8 0.0 18.3 0.0
Grand Portage 61 98 0.09 3 15.4 9.1 104.1 0.0 14.9 0.0
Hibbing 63 81 0.25 12 37.8 11.7 140.9 0.1 19.4 0.1
Hill City 66 70 0.09 11 52.4 24.8 148.7 0.5 35.0 0.7
Isabella 60 91 0.57 6 15.4 6.2 71.9 0.0 10.1 0.0
Itasca 62 77 0.07 6 69.4 16.5 148.5 1.0 25.8 1.3
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Kelliher 59 93 0.29 8 33.3 28.4 157.0 0.0 39.1 0.0
Kittson 65 75 0.09 4 60.2 8.3 70.4 0.6 12.8 0.4
Litchfield 75 58 0.07 13 69.7 9.4 43.0 1.8 12.1 1.7
Littlefork 60 85 0.08 9 55.4 30.2 163.0 0.6 41.3 0.9
Mille Lacs WMA 70 61 0.0 6 59.2 5.2 38.5 0.6 7.8 0.3
MN Valley 75 56 0.23 11 65.6 14.1 118.3 1.3 21.7 1.8
Moose Lake 69 63 0.03 12 66.4 14.7 79.6 1.5 20.1 2.0
Mora 71 62 0.05 12 69.2 9.0 108.0 1.6 14.9 1.7
New Ulm Municipal Airport 73 61 0.05 12 59.6 7.5 22.9 1.0 8.2 0.6
Orr 59 92 0.25 9 23.8 26.0 141.2 0.0 35.6 0.0
Redstn 73 61 0.01 12 67.8 8.8 12.0 1.5 8.5 0.9
Rice Lake 69 63 0.04 11 67.2 23.5 134.7 1.4 32.7 3.0
Rochester 73 69 0.03 20 75.3 5.8 29.4 3.8 7.8 3.5
Roseau 64 74 0.85 12 44.0 5.7 77.2 0.2 9.7 0.1
Saginaw 65 81 0.14 5 44.0 21.1 122.5 0.1 29.5 0.1
Seagull Lake 61 96 1.19 7 8.2 6.6 70.3 0.0 10.7 0.0
Sherburne 73 59 0.17 10 60.2 3.8 72.6 0.9 6.8 0.5
Skibo 60 88 0.14 6 29.0 20.7 155.1 0.0 31.0 0.0
Stanton Airfield 74 58 0.3 17 70.6 20.0 174.6 2.6 31.1 5.6
St. Croix 71 61 0.03 8 72.6 10.1 101.7 1.3 16.2 1.2
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Superior #2 64 84 0.19 4 31.2 15.9 134.5 0.0 24.6 0.0
Voyageurs/Kabnam 57 95 0.2 3 27.4 35.0 165.2 0.0 45.8 0.0

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.