Forecast Canadian fire danger indexes

Forecast for 13:00 2014-09-30

Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Agassiz 55 60 0.0 16 71.5 13.0 285.4 2.4 23.4 4.3
Badoura 54 59 0.0 14 76.7 25.4 343.7 2.6 42.9 6.9
Baudette 54 61 0.0 12 65.5 7.9 215.4 1.4 14.5 1.2
Bemidji 53 60 0.0 15 73.2 17.5 262.9 2.4 30.1 5.1
Bigstone 62 61 0.0 20 85.6 24.2 195.1 11.4 36.9 21.0
Brainerd 54 62 0.0 13 68.7 17.4 115.0 1.8 25.3 3.2
Camp Ripley/Little Falls 55 56 0.0 14 73.1 19.8 106.7 2.2 27.0 4.2
Carlos Avery 58 55 0.0 10 85.8 32.2 226.5 5.5 47.5 13.8
Cass Lake 54 60 0.0 13 73.1 20.9 361.4 2.0 36.5 4.8
Cutfoot 54 60 0.0 11 73.5 20.2 354.8 1.7 35.3 4.0
Detroit Lakes 56 58 0.0 18 81.7 27.7 306.2 6.1 45.2 14.7
Effie 56 57 0.0 9 73.8 16.1 282.9 1.6 28.2 3.0
Ely 49 69 0.0 8 65.4 18.6 252.7 1.0 31.4 1.8
Fernberg 48 68 0.0 8 55.7 13.3 241.6 0.6 23.4 0.6
Grand Portage 49 62 0.0 6 63.4 10.2 183.2 0.8 18.0 0.7
Hibbing 53 62 0.0 11 71.1 15.5 277.4 1.6 27.2 2.9
Hill City 54 60 0.0 11 66.5 14.4 266.1 1.4 25.3 2.4
Isabella 48 65 0.01 8 57.4 13.0 202.4 0.7 22.4 0.6
Itasca 54 59 0.0 14 73.9 22.9 329.8 2.2 39.0 5.5
Kelliher 54 59 0.0 12 74.6 13.5 239.6 2.0 23.7 3.6
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Kittson 55 64 0.0 15 63.5 10.4 281.7 1.7 19.1 2.3
Litchfield 59 57 0.0 15 85.0 22.9 231.2 7.1 36.8 14.8
Littlefork 53 62 0.0 9 67.3 11.5 260.4 1.2 20.7 1.5
Meander USFS 52 63 0.0 7 61.5 12.9 345.1 0.8 23.6 0.8
MN Valley 60 53 0.0 12 84.6 26.5 363.9 5.2 44.8 12.9
Moose Lake 53 59 0.0 9 66.5 14.1 197.9 1.2 23.9 1.7
Mora 54 57 0.0 10 72.0 17.2 87.0 1.5 23.1 2.5
Orr 54 61 0.0 8 67.2 16.9 360.5 1.1 30.3 1.9
Redstn 65 72 0.01 15 84.3 32.9 327.6 6.5 52.6 16.7
Rice Lake 55 59 0.0 10 72.0 17.3 101.7 1.6 24.3 2.6
Roseau 56 62 0.0 14 67.1 9.4 320.3 1.8 17.5 2.3
Saginaw 52 63 0.0 12 63.0 12.4 215.5 1.2 21.7 1.6
Seagull Lake 47 65 0.0 6 56.5 11.5 187.2 0.5 19.9 0.5
Sherburne 58 56 0.0 13 82.6 32.1 160.5 4.3 42.8 10.8
St. Croix 56 56 0.0 9 74.1 18.9 87.2 1.5 24.6 2.6
Voyageurs/Kabnam 53 64 0.0 7 60.1 9.9 230.6 0.7 17.9 0.6

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.