Forecast Canadian fire danger indexes

Forecast for 13:00 2014-10-21

Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Agassiz 56 55 0.0 21 85.3 15.9 290.5 11.7 28.0 18.7
Badoura 53 56 0.0 16 86.6 27.5 377.4 9.8 46.5 21.1
Baudette 51 58 0.0 17 84.6 11.8 191.4 7.9 20.4 11.8
Bemidji 51 59 0.0 15 85.7 16.7 283.9 8.0 29.1 14.3
Bigstone 63 44 0.0 18 88.5 45.3 262.2 15.6 63.2 33.9
Brainerd 54 54 0.0 14 85.9 19.4 153.8 7.7 29.5 13.9
Camp Ripley/Little Falls 53 55 0.0 13 86.8 26.7 163.1 7.5 37.9 15.6
Carlos Avery 52 55 0.0 9 86.4 24.0 231.4 5.3 38.1 12.0
Cass Lake 52 59 0.0 14 85.6 21.3 389.5 7.1 37.4 14.9
Cutfoot 51 60 0.0 11 84.4 16.2 340.3 4.7 29.0 9.2
Detroit Lakes 58 51 0.0 19 86.2 34.7 352.8 12.1 55.7 26.9
Effie 50 59 0.0 12 84.1 16.0 296.9 4.8 28.2 9.2
Ely 46 60 0.0 8 82.9 15.4 281.1 3.1 27.2 6.0
Fernberg 45 61 0.0 7 82.0 10.6 249.1 2.5 19.2 4.0
Grand Portage 43 63 0.0 5 78.9 10.0 188.0 1.6 17.7 2.0
Hibbing 48 60 0.0 11 83.6 11.2 263.5 4.1 20.3 6.7
Hill City 50 59 0.0 12 83.3 9.5 247.0 4.4 17.3 6.6
Isabella 42 66 0.0 8 80.0 7.0 192.2 2.1 12.8 2.3
Itasca 54 56 0.0 17 85.9 24.9 370.8 9.5 42.7 19.8
Kelliher 50 60 0.0 13 83.9 14.3 253.0 5.0 25.1 9.0
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Kittson 59 52 0.0 25 85.4 15.5 301.2 16.4 27.4 23.6
Litchfield 56 54 0.0 12 87.3 35.2 284.3 7.7 53.8 19.1
Littlefork 49 61 0.0 9 84.8 15.2 275.6 4.2 26.6 8.0
Meander USFS 46 63 0.0 7 80.0 6.1 329.9 2.0 11.7 2.0
MN Valley 55 53 0.0 8 87.3 25.8 340.1 5.6 43.4 13.5
Moose Lake 50 56 0.0 6 85.0 16.1 190.9 3.5 26.5 6.8
Mora 50 56 0.0 9 85.5 19.9 120.2 4.7 28.1 9.1
Orr 47 63 0.0 8 82.7 11.8 357.4 2.9 21.9 5.1
Redstn 61 49 0.0 17 88.7 30.7 367.6 14.2 50.7 28.6
Rice Lake 50 60 0.0 8 83.5 12.2 117.8 3.2 19.4 5.2
Roseau 55 60 0.0 21 84.4 13.1 332.3 10.3 23.8 15.7
Saginaw 49 58 0.0 9 82.0 8.3 168.0 3.0 14.8 3.9
Seagull Lake 45 57 0.0 6 81.9 9.8 184.0 2.3 17.2 3.4
Sherburne 53 54 0.0 10 86.6 35.3 206.2 5.9 49.4 15.0
St. Croix 52 49 0.0 7 86.0 18.5 77.1 4.3 23.1 7.6
Voyageurs/Kabnam 49 62 0.0 6 82.8 12.2 254.5 2.5 21.8 4.2

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.