Forecast Canadian fire danger indexes

Forecast for 13:00 2014-10-25

Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Agassiz 51 41 0.0 16 87.9 19.3 305.0 11.4 33.3 19.9
Badoura 54 36 0.0 12 88.6 33.0 392.1 9.0 54.6 21.5
Baudette 51 45 0.0 15 88.4 17.5 205.9 11.4 28.8 18.6
Bemidji 52 41 0.0 16 89.7 23.3 299.0 15.2 39.0 26.4
Bigstone 61 34 0.0 10 89.2 41.9 273.5 8.4 60.6 21.7
Brainerd 55 37 0.0 16 87.5 23.3 167.7 11.2 34.5 20.1
Camp Ripley/Little Falls 57 35 0.0 17 87.6 29.4 177.4 12.1 41.6 23.2
Carlos Avery 61 34 0.0 17 88.5 28.6 246.0 13.4 44.4 25.8
Cass Lake 53 38 0.0 16 89.7 27.6 404.3 14.9 47.2 28.5
Cutfoot 52 41 0.0 18 85.0 15.6 346.3 9.0 28.0 15.3
Detroit Lakes 52 38 0.0 13 87.8 32.6 361.1 9.1 53.2 21.5
Effie 52 40 0.0 19 87.0 16.8 310.5 12.9 29.6 20.6
Ely 51 41 0.0 19 86.3 17.1 293.4 11.9 29.8 19.5
Fernberg 51 40 0.0 18 84.7 11.5 260.9 9.0 20.7 13.2
Grand Portage 53 43 0.0 21 84.3 11.7 198.0 10.2 20.4 14.4
Hibbing 53 40 0.0 22 85.4 11.3 271.1 12.9 20.4 17.2
Hill City 52 40 0.0 20 85.6 9.8 252.8 11.5 17.8 14.8
Isabella 51 42 0.0 20 84.3 7.7 203.3 9.9 14.1 11.8
Itasca 53 36 0.0 12 90.4 31.7 385.8 12.2 52.5 26.3
Kelliher 51 40 0.0 13 89.3 20.3 267.7 11.0 34.1 19.6
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Kittson 51 42 0.0 15 88.0 20.3 314.8 11.1 34.9 20.0
Littlefork 52 42 0.0 18 88.2 20.5 289.6 14.5 34.8 24.2
Meander USFS 51 43 0.0 20 86.4 9.7 342.1 12.9 18.1 16.3
Moose Lake 55 40 0.0 20 84.4 14.2 198.0 9.6 24.1 15.0
Mora 56 38 0.0 19 87.1 23.5 133.5 12.8 32.6 21.5
Orr 52 41 0.0 20 87.2 16.6 370.9 13.9 29.8 21.8
Redstn 64 30 0.0 6 88.8 22.8 360.7 6.0 39.3 13.4
Rice Lake 54 38 0.0 20 86.3 12.8 131.0 12.6 20.6 17.0
Roseau 51 46 0.0 16 86.1 17.3 346.1 9.1 30.7 16.2
Saginaw 54 38 0.0 22 85.8 9.1 179.9 14.4 16.2 16.8
Seagull Lake 51 42 0.0 18 87.1 13.2 195.7 12.3 22.7 17.5
Sherburne 60 34 0.0 17 87.5 32.9 220.5 11.8 47.9 24.5
St. Croix 58 35 0.0 17 88.3 22.4 90.7 12.8 27.7 19.9
Voyageurs/Kabnam 52 45 0.0 20 86.6 16.6 267.6 13.5 28.8 21.0

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.