1. Westerling et al, 2006 Science

4. Late Snowmelt YearsEarly Snowmelt Years 1972 - 2003, NPS, USFS & BIA Fires over 1000 acres

5. Other Large Wildfires Have Not Changed Substantially Since the mid-1980s Large Forest Wildfires Have Increased ~300%

6. Forest Fires & Temperature Correlation: 0.70

7. Correlation: 0.08 Grass/Shrub Fires and Temperature

8. Correlation: 0.56 Forest Fires & Timing of Spring

10. snowmelt in western streamflow gauges is a regional signal, correlated with Forest Wildfire

11. Most forest fires occur in years with early Springs… … at elevations around 7000 feet

12. Early - Late Oct to May Precip Early - Late Mar to Aug Temp

14. largest vulnerable forest area biggest increase in wildfires risks least affected by suppression

15. less vulnerable to warming most affected by suppression

16. vulnerable affected by suppression

17. Large forest fires increased, but total ignitions did not.