Observed Canadian fire danger indexes

Updated 13:00 2016-06-29

**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 79 51 0.0 9 87.9 20.4 87.2 6.6 25.8 11.5
Albert Lea 75 50 0.0 3 87.5 27.1 82.3 4.0 29.7 8.2
Badoura 79 41 0.0 5 89.7 33.9 244.0 6.2 50.4 15.7
Baudette 80 45 0.19 10 78.2 8.7 19.6 2.2 8.6 1.7
Bemidji 79 43 0.0 6 89.5 34.2 239.5 6.5 50.4 16.2
Bigstone 81 46 0.0 7 89.2 88.5 380.6 6.7 112.0 25.3
Brainerd 78 41 0.0 4 89.2 23.9 89.2 5.3 28.7 10.2
Camp Ripley/Little Falls 80 35 0.0 7 90.9 52.4 224.8 8.6 66.2 23.1
Carlos Avery 76 48 0.0 3 88.1 24.0 136.8 4.1 33.4 9.0
Cass Lake 79 40 0.0 7 89.8 32.1 221.6 7.3 47.1 17.2
Cutfoot 78 44 0.0 6 88.6 24.6 174.9 5.7 36.4 12.3
Detroit Lakes 79 42 0.0 6 89.7 43.6 220.9 6.7 58.3 18.0
Effie 78 46 0.0 8 88.2 29.4 191.0 6.4 42.4 14.6
Ely 74 48 0.0 10 87.0 18.2 162.8 6.3 28.5 11.7
Fernberg 76 48 0.0 7 86.7 19.3 172.6 4.7 30.2 9.5
Grand Portage 75 54 0.0 7 86.1 13.3 37.6 4.3 14.1 5.7
Hibbing 76 45 0.0 11 88.6 15.7 90.3 8.5 21.9 12.9
Hill City 77 45 0.0 5 88.3 17.7 90.8 5.0 23.8 8.7
Isabella 74 48 0.0 5 86.4 18.0 135.3 3.8 27.1 7.5
Itasca 78 43 0.0 6 89.2 33.1 205.5 6.2 47.2 15.2
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Kelliher 77 48 0.0 9 87.7 28.3 265.6 6.4 44.7 15.1
Kittson 81 45 0.0 7 88.9 24.5 76.4 6.5 27.2 11.7
Litchfield 78 42 0.0 5 89.4 37.2 79.6 5.9 37.1 12.8
Littlefork 80 50 0.0 8 86.7 11.1 93.9 5.1 17.1 7.4
Meander USFS 75 52 0.02 4 83.3 12.3 92.0 2.3 18.4 3.5
MNS #1 76 44 0.0 4 88.1 25.1 173.5 4.5 36.8 10.3
MN Valley 77 42 0.0 4 89.5 45.4 251.9 5.5 62.6 16.2
Moose Lake 77 47 0.0 6 88.3 20.7 42.8 5.4 20.6 8.7
Mora 77 43 0.0 6 88.9 25.7 237.1 5.9 40.5 13.5
New Ulm Municipal Airport 75 50 0.0 0 88.7 38.4 81.8 3.6 38.3 8.6
Orr 79 51 0.0 6 86.4 14.6 153.6 4.2 23.6 7.4
Redstn 78 59 0.0 4 87.1 29.9 163.3 3.9 41.0 9.8
Rice Lake 78 43 0.0 7 89.1 21.2 30.1 6.7 20.9 10.4
Rochester 73 53 0.0 6 86.7 17.1 61.9 4.3 20.2 6.9
Roseau 80 48 0.0 14 88.7 21.1 78.0 11.0 25.2 16.9
Saginaw 78 42 0.0 4 89.3 23.3 142.4 5.3 33.0 11.1
Seagull Lake 75 52 0.0 10 86.6 16.4 68.3 5.9 20.5 9.3
Sherburne 76 45 0.0 4 88.4 27.6 193.6 4.7 40.7 11.3
Skibo 75 47 0.0 3 86.8 16.0 114.0 3.5 23.7 6.2
Stanton Airfield 74 43 0.0 3 89.0 43.6 216.2 4.9 58.0 14.2
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
St. Croix 76 49 0.0 3 87.9 25.7 176.8 4.1 37.7 9.5
Superior #1 77 43 0.0 5 87.3 27.4 96.4 4.4 32.0 9.2
Superior #2 78 45 0.0 5 87.0 13.8 107.7 4.2 20.9 6.9
Voyageurs/Kabnam 80 51 0.11 5 77.0 10.6 76.7 1.3 15.8 1.2

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.