Forecast Canadian fire danger indexes

Forecast for 13:00 2014-04-21

Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Agassiz 45 65 0.01 19 84.5 12.6 30.1 9.5 12.6 10.8
Badoura 57 48 0.0 17 87.4 11.7 21.6 12.0 11.6 12.6
Baudette 37 87 0.0 17 79.3 8.6 25.7 4.3 9.4 4.4
Bemidji 52 54 0.01 18 87.8 20.4 56.9 13.9 21.5 18.7
Bigstone 62 34 0.0 22 91.2 30.8 230.9 30.2 46.2 44.9
Brainerd 61 41 0.0 18 90.2 14.2 22.0 19.4 14.0 19.6
Camp Ripley/Little Falls 62 33 0.0 18 89.7 15.2 41.1 18.3 15.8 19.8
Carlos Avery 65 38 0.0 17 89.0 15.3 41.2 15.1 15.9 17.3
Cass Lake 54 47 0.0 18 88.8 19.5 56.4 15.3 20.9 19.7
Cutfoot 52 51 0.0 16 85.5 12.6 30.8 8.3 12.6 9.6
Hill City 59 48 0.0 17 86.5 11.9 32.8 10.5 12.5 11.7
Itasca 53 51 0.01 18 88.2 14.9 33.1 14.0 14.9 15.8
Kelliher 49 60 0.0 16 85.9 14.0 30.9 8.9 14.0 10.7
Litchfield 63 36 0.0 19 89.5 23.1 99.8 19.3 29.3 27.2
MN Valley 67 35 0.0 18 88.3 16.0 35.1 15.0 16.0 17.2
Mora 63 37 0.0 16 89.3 12.9 32.1 14.3 12.9 15.1
Redstn 65 31 0.04 21 89.7 30.6 271.5 22.1 47.7 37.3
Rice Lake 62 39 0.0 17 90.4 14.1 27.3 18.4 13.9 18.9
Roseau 43 69 0.01 18 81.5 9.0 25.6 6.0 9.6 6.3
Seagull Lake 56 52 0.0 11 79.9 8.0 109.8 2.8 13.5 3.6
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Sherburne 65 32 0.0 18 90.1 18.2 73.6 18.9 22.5 23.7
St. Croix 63 40 0.01 14 86.1 8.8 15.0 7.6 8.6 7.4

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.