Forecast Canadian fire danger indexes

Forecast for 13:00 2014-04-25

Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Agassiz 47 62 0.39 7 34.4 4.6 12.8 0.0 4.8 0.0
Badoura 51 54 0.29 10 42.7 4.4 2.9 0.1 3.9 0.1
Baudette 44 70 0.49 7 30.1 4.1 11.0 0.0 4.2 0.0
Bemidji 49 59 0.32 9 39.0 6.7 36.0 0.1 9.1 0.0
Bigstone 62 37 0.2 11 58.5 7.6 178.2 0.9 13.7 0.6
Brainerd 51 51 0.43 9 42.0 5.0 2.9 0.1 4.5 0.0
Camp Ripley/Little Falls 56 46 0.35 12 50.5 5.7 21.1 0.5 6.8 0.2
Carlos Avery 56 49 0.59 14 49.1 5.4 3.4 0.5 4.8 0.2
Cass Lake 47 54 0.47 8 37.3 6.0 29.0 0.0 7.9 0.0
Cutfoot 46 58 0.52 8 34.5 4.5 7.1 0.0 4.3 0.0
Effie 45 53 0.64 7 34.3 2.8 2.3 0.0 2.3 0.0
Hibbing 45 53 0.65 9 36.9 2.7 2.3 0.0 2.3 0.0
Hill City 47 59 0.54 9 35.5 4.3 7.5 0.0 4.1 0.0
Itasca 49 58 0.32 10 39.3 4.6 2.7 0.1 4.1 0.0
Kelliher 46 63 0.42 8 33.4 5.1 12.4 0.0 5.1 0.0
Litchfield 58 44 0.29 13 53.6 3.9 63.5 0.7 6.7 0.3
Littlefork 42 60 0.71 8 34.8 3.4 2.0 0.0 2.8 0.0
Meander USFS 39 66 0.73 8 34.2 4.1 1.7 0.0 3.4 0.0
MN Valley 60 44 0.55 13 51.5 3.8 3.8 0.6 3.4 0.2
Moose Lake 49 56 0.58 10 38.0 2.7 2.7 0.1 2.3 0.0
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Mora 53 51 0.49 13 47.1 5.0 8.9 0.3 4.8 0.1
Orr 42 60 0.74 8 33.3 3.0 2.0 0.0 2.5 0.0
Redstn 63 31 0.03 6 72.2 16.6 247.5 1.1 28.4 1.8
Rice Lake 49 55 0.55 10 39.5 5.0 4.1 0.1 4.5 0.0
Roseau 45 68 0.44 8 32.2 3.6 8.2 0.0 3.6 0.0
Seagull Lake 38 63 0.77 10 39.6 5.8 81.0 0.1 9.8 0.0
Sherburne 56 47 0.38 13 51.4 6.6 50.8 0.5 10.0 0.3
St. Croix 51 49 0.61 10 42.1 3.8 2.9 0.1 3.3 0.0
Voyageurs/Kabnam 40 65 0.75 8 33.2 3.5 1.8 0.0 2.9 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.