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Fire Whirl Formation During a Valley Wind Reversal Daisuke Seto, Craig B. Clements, and Scott Strenfel Department of Meteorology San José State University.

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Presentation on theme: "Fire Whirl Formation During a Valley Wind Reversal Daisuke Seto, Craig B. Clements, and Scott Strenfel Department of Meteorology San José State University."— Presentation transcript:

1 Fire Whirl Formation During a Valley Wind Reversal Daisuke Seto, Craig B. Clements, and Scott Strenfel Department of Meteorology San José State University San José, CA Warren E. Heilman and Xindi Bian Northern Research Station USDA Forest Service East Lansing, MI

2 Overview of Presentation Background Experimental design & instrument setup Observations - High-frequency wind data - Turbulence Kinetic Energy - Momentum fluxes Summary Future work

3 Fire Whirl Formation Location: Joseph D. Grant State Park (10mi. E of San Jose) Date: 7 Oct 2008 Movie: Andrew Joros Edit: Scott Strenfel

4 Experimental Design 20 ft tower – 10 Hz turbulence (18’, 276° ) – 1 Hz temperature & RH – 4 fine-wire theromocouples – Heat flux and CO 2 Tripod – wind speed & direction – temperature & RH

5 Topography

6 Wind speed and direction Fire whirl

7

8 High frequency horizontal winds

9 High frequency vertical wind

10

11

12 Std dev? Intensity?

13

14 Preliminary wind analysis

15

16 Summary

17 Future Work Run numerical model for simulation of fire whirl formation.

18 Acknowledgements

19

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