Forecast Canadian fire danger indexes

Forecast for 13:00 2017-03-26

**Local agency personnel should contact MIFC Fire Intelligence if errors or omissions are observed.**

Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
Agassiz 44 69 0.05 5 49.8 1.4 1.5 0.2 1.1 0.1
Albert Lea 41 81 0.06 7 36.5 1.2 1.3 0.0 0.8 0.0
Badoura 42 65 0.0 2 75.8 5.1 14.9 1.0 5.5 0.4
Baudette 44 63 0.0 3 76.4 5.0 13.6 1.1 5.2 0.5
Bemidji 43 62 0.0 3 74.5 4.4 12.0 0.9 4.6 0.4
Bigstone 45 71 0.0 6 80.0 15.0 40.2 1.8 15.5 2.2
Brainerd 40 70 0.0 5 80.6 9.6 24.1 1.8 9.6 1.4
Camp Ripley/Little Falls 40 72 0.02 5 75.0 7.5 21.5 1.2 8.0 0.6
Carlos Avery 40 84 0.02 6 72.0 9.3 14.3 1.1 9.0 0.6
Cass Lake 42 65 0.0 3 68.4 3.8 3.6 0.8 3.4 0.3
Detroit Lakes 44 66 0.0 3 78.0 5.0 12.3 1.2 5.0 0.5
Effie 42 66 0.0 2 67.7 3.9 7.4 0.7 3.8 0.3
Hill City 38 73 0.0 5 70.0 2.2 6.2 0.9 2.3 0.3
Itasca 43 61 0.0 2 64.5 4.0 1.9 0.6 3.4 0.2
Kelliher 44 61 0.0 2 71.3 4.1 9.0 0.8 4.1 0.3
Kittson 45 67 0.0 6 82.2 7.0 16.6 2.3 6.9 1.6
Litchfield 40 81 0.02 7 57.0 5.1 26.1 0.6 6.8 0.3
MN Valley 41 83 0.03 7 71.2 10.1 19.2 1.1 10.0 0.7
Moose Lake 37 78 0.0 6 73.9 3.0 7.7 1.2 3.1 0.4
Mora 39 76 0.02 7 78.0 4.1 9.1 1.7 4.1 0.7
Station °F RH P24I Wind FFMC DMC DC ISI BUI FWI
New Ulm Municipal Airport 40 85 0.0 7 73.4 8.6 30.4 1.3 10.0 0.8
Redstn 41 82 0.0 5 74.5 12.3 34.3 1.1 13.0 0.8
Rice Lake 38 73 0.0 6 67.8 1.8 4.0 0.9 1.8 0.3
Rochester 42 77 0.06 7 41.9 0.5 1.4 0.1 0.5 0.0
Roseau 45 65 0.0 5 83.7 7.3 16.8 2.6 7.3 2.0
Saginaw 36 79 0.0 6 55.5 3.2 6.4 0.5 3.1 0.2
Sherburne 40 77 0.02 7 69.6 4.1 2.3 1.1 3.5 0.4
Stanton Airfield 41 81 0.02 6 72.8 8.0 26.3 1.1 9.1 0.6
St. Croix 39 80 0.01 6 81.7 7.3 16.7 2.3 7.2 1.7

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.