Thirtymile Fire - USDA Forest Service

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Appendix: Weather mentioned, infra-red satellite images showed the movement of a weak weather disturbance northward from central Oregon to over the Thirtymile fire during the afternoon of the July 10 th . This is evident from the observed northward movement of the debris clouds from the previous day’s convection over central Oregon. Wind speeds over the fire site between 20,000 and 30,000 feet MSL increased by 20 to 30 knots as verified by the 11/00Z and 11/12Z sounding from Kelowna, British Columbia. The coincidental arrival of the weak weather disturbance from Oregon and the significant increase in the afternoon and evening wind speeds near the top of the column contributed to the already unstable air mass and possibly aided the fire’s column development. (See Weather: Attachments 4 and 5.) Summary The combination of near record low snow pack and lack of precipitation during the winter of 2000/2001 contributed significantly to the very dry fuel conditions present this year in the Chewuch River. By the 10 th of July, near record temperatures, the long, dry days, an unstable atmosphere and a receptive fuel bed all combined to produce a plume dominated fire. The Thirtymile Fire in the late afternoon (~ 5:30 p.m. PDT), July 10, 2001 69
Appendix: Weather Weather Appendix Attachment 1. RAWS Observations for First Butte and NCSB Sites NOTE: • NCSB is a Remote Automatic Weather Station at the North Cascade’s Smoke Jumper Base, to the east of the town of Winthrop, WA. • 1st Butte is a Remote Automated Weather Station near the 1st Butte Lookout to the southeast of the Fire Site. 70
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Thirtymile Fire Investigation Repor
Page 3 and 4:
Accident Investigation Factual Repo
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Investigation Team of the Thirtymil
Page 7 and 8:
Prologue In Memory Of Tom Craven Ka
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Executive Summary He turned the van
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Incident Overview Thirtymile Fire V
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Incident Overview The Entiat IHC wa
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Incident Overview pumps with kits,
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Incident Overview Incident Organiza
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Incident Overview At 12:08 p.m. Pet
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Incident Overview of the fire and c
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Incident Overview The Entrapment Th
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Incident Overview Figure 10. The Ro
Page 27 and 28: Incident Overview Conditions outsid
Page 29 and 30: Incident Overview References 1. Dis
Page 31 and 32: Findings Significant Equipment Find
Page 33 and 34: Environment Findings 8. No Spot Fir
Page 35 and 36: Environment Findings 36. The deploy
Page 37 and 38: Equipment Findings 9. The following
Page 39 and 40: People Findings People Findings Sig
Page 41 and 42: People Findings the road and recomm
Page 43 and 44: Management Findings Management Find
Page 45 and 46: Management Findings • The IC was
Page 47 and 48: Management Findings 25. * Between 3
Page 49 and 50: Standard Fire Orders Standard Fire
Page 51 and 52: Watch Out Situations Watch Out Situ
Page 53 and 54: Epilogue Epilogue The Investigation
Page 55 and 56: Appendix: Investigation Team Thirty
Page 57 and 58: 48 Appendix: Investigation Team
Page 59 and 60: Appendix: Time Line Incident Time L
Page 61 and 62: Appendix: Time Line Event Time/Date
Page 63 and 64: Appendix: Fire Behavior Appendix: F
Page 65 and 66: Appendix: Fire Behavior Transition
Page 67 and 68: Appendix: Fire Behavior where the f
Page 69 and 70: Appendix: Fire Behavior extending f
Page 71 and 72: Appendix: Fire Behavior low since t
Page 73 and 74: Appendix: Fire Behavior 100% and in
Page 75 and 76: Appendix: Weather Appendix: Weather
Page 77: Appendix: Weather 2:00 p.m. (PDT) w
Page 81 and 82: Appendix: Weather Weather Appendix
Page 87 and 88: Appendix: Weather .WEDNESDAY... SKY
Page 89 and 90: Appendix: Human Factors fire approa
Page 91 and 92: Appendix: Human Factors one and onl
Page 93 and 94: Appendix: Human Factors Entiat IHC
Page 95 and 96: Appendix: Equipment Appendix: Equip
Page 97 and 98: Appendix: Equipment • Four of the
Page 99 and 100: Appendix: Equipment issued in sprin
Page 101 and 102: Appendix: Equipment THIRTYMILE FIRE
Page 103 and 104: Appendix: Equipment LO WER DEPLO YM
Page 105 and 106: Appendix: Qualifications Name North
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Thirtymile Fire - USDA Forest Service

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