Forecast Canadian fire danger indexes

Forecast for 12:00 2014-11-24

Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Agassiz 10 76 0.05 20 69.8 17.0 310.3 3.2 29.9 6.7
Badoura 15 75 0.03 20 76.3 21.8 402.7 4.1 38.4 9.7
Baudette 13 73 0.08 19 52.7 2.2 174.7 1.0 4.2 0.4
Bemidji 13 74 0.05 20 70.6 14.7 296.7 3.1 26.2 6.1
Bigstone 17 74 0.03 29 77.4 21.3 277.7 9.1 35.7 17.6
Brainerd 20 73 0.03 23 74.9 6.0 161.0 5.0 11.0 5.7
Camp Ripley/Little Falls 18 73 0.03 22 74.2 5.7 159.7 4.5 10.5 5.0
Carlos Avery 23 77 0.07 22 50.6 21.1 265.0 1.1 35.2 2.3
Cass Lake 17 68 0.03 19 78.3 13.8 383.6 4.5 25.3 8.3
Cutfoot 18 76 0.04 16 67.0 4.9 333.0 2.1 9.5 1.8
Detroit Lakes 12 76 0.04 24 73.5 14.5 360.8 5.1 26.4 9.3
Effie 17 78 0.05 15 69.0 8.5 308.7 2.1 15.9 2.7
Ely 17 84 0.11 16 50.6 6.0 285.9 0.6 11.5 0.4
Fernberg 16 85 0.12 16 39.9 3.2 254.0 0.1 6.3 0.1
Grand Portage 19 86 0.19 22 21.9 2.1 182.6 0.0 4.1 0.0
Hibbing 17 86 0.05 23 66.6 4.3 261.6 3.7 8.3 3.5
Hill City 18 80 0.05 20 66.6 6.7 252.7 2.9 12.6 3.4
Isabella 15 90 0.13 17 26.2 0.1 179.2 0.0 0.2 0.0
Itasca 12 75 0.04 22 72.6 25.9 402.8 4.2 44.6 10.8
Kelliher 13 80 0.05 15 68.1 6.8 231.2 2.0 12.7 2.2
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Kittson 9 76 0.07 21 63.4 16.2 324.9 2.6 28.8 5.4
Litchfield 18 81 0.06 25 41.0 20.3 299.0 0.3 34.8 0.4
Littlefork 16 75 0.06 16 66.1 4.4 276.0 1.9 8.4 1.3
Meander USFS 17 82 0.06 15 41.4 0.5 304.9 0.2 1.0 0.0
MN Valley 23 73 0.06 23 67.8 41.5 246.1 3.8 58.3 11.7
Moose Lake 22 82 0.07 20 60.8 6.9 205.7 2.1 12.8 2.3
Mora 23 74 0.05 22 68.2 16.4 136.4 3.6 25.2 6.8
Orr 16 80 0.06 16 62.6 6.3 349.3 1.7 12.0 1.5
Redstn 17 79 0.07 25 46.3 23.4 387.3 0.8 40.7 1.5
Rice Lake 23 75 0.06 19 55.3 1.7 122.7 1.3 3.2 0.5
Roseau 11 75 0.08 17 59.9 10.8 341.4 1.6 20.1 2.4
Saginaw 20 80 0.08 23 58.4 2.5 172.9 2.4 4.9 1.2
Seagull Lake 15 80 0.14 17 47.3 3.4 197.8 0.5 6.6 0.2
Sherburne 21 76 0.04 22 63.3 27.1 243.7 3.0 42.4 7.9
St. Croix 25 77 0.1 19 49.8 9.0 96.6 0.7 14.6 0.6
Voyageurs/Kabnam 17 81 0.06 15 38.5 0.0 218.5 0.1 0.0 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.