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PRESENTATION INDEX (18 min., 27 sec.) This is a 15-minute, 23-slide Zoom Powerpoint presentation to the annual Northwest Weather Workshop on May 1, 2021. The event was hosted by Cliff Mass from the University of Washington Department of Atmospheric Sciences and sponsored by the NOAA National Weather Service and the Puget Sound and Oregon Chapters of the American Meteorological Society. The topic is the historical context for the catastrophic 2020 Labor Day Fires of western Oregon, which was also the general focus of the workshop. 0:00 Title Page 0:13 Cliff Mass: Workshop Introduction 0:45 Logan Johnson: NOAA Greeting 1:32 Cliff Mass: Meeting Outline 4:09 Cliff Mass: Bob Zybach Introduction 4:30 Bob Zybach: Presentation Topic 4:44 Slide 1: 2003 Fire Triangle (Zybach & Gruen) 5:01 Slide 2: 1847 Mt. St. Helens Eruption 5:26 Slide 3: 1992-1996 Oregon Lightning Strikes Map 6:00 Slide 4: 1980s "Indian Burning" Painting/National SAF Journal Cover 6:15 Slide 5: 1841 Drawing of Kalapuyan Man, Willamette Valley 6:38 Slide 6. 2003 "Types of Indian Burning" Table (Zybach & Lake) 7:06 Slide 7. 1841-1856 Indian Sea-Going Canoes, Lodges & Plank Homes 7:30 Slide 8. 1841 Giant Douglas Fir Near Astoria 7:41 Slide 9. 1920s Giant Sitka Spruce Near Newport 7:48 Slide 10. 2000s Generic Forest Wildfire Photo 7:53 Slide 11. 1885 Drawing of Yaquina Burn Near Toledo 8:15 Slide 12. 1894 Photo of Goulds Lake Landslide & "The Big Burn" 8:38 Slide 13. 1902 Photo of "Great Yaquina Burn" Near Burnt Wood 9:02 Slide 14. 1933 Aerial Photo of Tillamook Fire Mushroom Cloud 9:22 Slide 15. 2003 Coast Range Fire History Map (Zybach & Matzke) 10:04 Slide 16. 2003 Western Oregon Wind Patterns Map (Read & Zybach) 10:58 Slide 17. 1990s Zybach Forest Fire Predictive Criteria 11:26 Slide 18. 1994 National Evergreen Interview: Zybach Fire Predictions 11:41 Slide 19. 1961-2008 US Wildfires Graph (Dubrasich & Zybach) 11:52 Slide 20. 2010 Photo of Rainbow Creek Fire, Umpqua River (Zybach) 12:20 Slide 21. 2020 Oregon Labor Day Fires Map (Alcock & Zybach) 13:11 Slide 22. Conclusions: 1) Wildfire Bad; 2) Prescribed Fire Good 15:13 Question 1: Are there statistics regarding how many of these fires are arson? 16:10 Question 2: What is the impact of pine beetles on the fuel levels in the forest? 16:52 Question 3: Has this problem been created by fire suppression policies? 17:39 Question 4: What is an example of an "invasive conifer?"