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Table 3 Average weather and fuel conditions for prescribed burns conducted in South Puget Sound, Washington, USA, prairies. All codes for the site listings are detailed in Table 1.

From: Prescribed Fire in Grassland Butterfly Habitat: Targeting Weather and Fuel Conditions to Reduce Soil Temperatures and Burn Severity

2014 burn date Site Time of ignition (hours) Burn length (min) Air temp. (°C) RH (%) Wind speed (m s−1) Fuel moisture Fuel loading (kg m−2) Thatch depth (cm) Open ground cover (%)
Live (%) Dead (%)
22 Jul LW 0942 33 15.9 71.2 0.5 74.7 14.5 0.52 2.4 0.6
22 Jul LW 1341 11 18.9 64.5 1.2 81.3 8.0 0.59 2.8 0.4
5 Aug TA6 0908 35 16.4 77.8 1.5 60.8 11.9 0.46 1.7 2.0
5 Aug TA6 1430 9 28.9 46.6 1.7 61.2 3.4 0.55 1.9 0.2
7 Aug JP 0804 27 14.4 87.9 1.9 58.8 13.3 0.56 2.2 0.7
7 Aug JP 0920 20 15.2 84.3 2.1 66.4 12.3 0.63 3.3 0.8
7 Aug JP 1400 20 26.5 46.3 1.7 53.6 2.7 0.56 1.7 1.6
7 Aug JP 1501 9 28.1 41.6 2.0 63.4 2.3 0.54 2.4 0.5
15 Aug UW 1238 28 23.8 67.0 1.2 59.4 30.0 0.49 2.3 1.5
18 Aug TA15 0858 32 24.0 69.4 0.5 66.1 26.5 0.51 1.5 3.3
18 Aug TA15 1002 20 25.9 59.7 0.9 59.8 21.4 0.53 1.6 2.3
18 Aug TA15 1534 37 31.4 40.5 1.5 60.9 5.8 0.50 2.0 3.5
18 Aug TA15 1716 20 32.0 44.6 0.9 60.4 5.8 0.53 1.8 1.4
19 Aug UW 1632 15 26.4 50.7 3.7 64.4 4.3 0.44 2.1 1.7
25 Aug SW 0900 28 21.1 70.4 0.6 58.4 16.3 0.65 2.7 1.6
25 Aug SW 1505 13 29.0 35.5 2.2 60.3 3.1 0.55 1.8 5.0
15 Sep GH 1014 20 20.2 53.3 1.5 71.1 8.2 0.18 2.7 15.0
15 Sep GH 1230 12 28.1 32.3 2.3 61.9 4.4 0.25 2.5 13.4
18 Sep TQ 1331 53 19.7 72.6 2.0 58.6 30.0 0.48 2.8 2.7
22 Sep TQ 1600 17 22.8 53.3 0.9 51.1 13.1 0.52 3.5 2.5
  Minimum 9 14.4 32.3 0.5 51.1 2.3 0.18 1.5 0.2
  Mean 23 23.4 58.5 1.5 62.6 11.9 0.50 2.3 3.0
  Maximum 37 32.0 87.9 3.7 81.3 30.0 0.65 3.5 15.0