Table 1 Environmental and fire behavior parameters for prescribed fire in ponderosa pine and mixed-conifer forest types.

Air Temperature (°C)

4–24

4–29

Relative Humidity (%)

20–65

20–60

Mid-flame Wind Speed (km hr⁻¹)

0–10

0–13

1-hr Timelag Fuel Moisture (%)

4–10

3–12

10-hr Timelag Fuel Moisture (%)

6–16

4–13

100-hr Fuel Timelag Moisture (%)

7–20

5–14

1000-hr Timelag Fuel Moisture (%)

10–20

10–20

Flame Length (m)

0.2–0.8

0–0.8

Rate of Spread (m min⁻¹)

0.1–7.0

0–5.4

Fireline Intensity (Kw m⁻¹)

3–588

14–415