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2024 Hennepin County All -Jurisdiction Hazard Mitigation Plan
<br />Volume 2 — Hazard Inventory
<br />4.3.12.12. Mitigation
<br />Education and Awareness Programs
<br />• Field construction crews, public works employees, and those who work or spend
<br />significant time outdoors should be educated about these risks.
<br />• Members of the public should understand the risks posed by non -convective wind events.
<br />• Educating homeowners on the benefits of wind retrofits such as shutters and hurricane
<br />clips.
<br />• Ensuring that school officials are aware of the best area of refuge in school buildings.
<br />• Educating design professionals to include wind mitigation during building design.
<br />Structural Mitigation Projects — Public Buildings & Critical Facilities
<br />• Anchoring roof -mounted heating, ventilation, and air conditioner units
<br />• Purchase backup generators
<br />• Upgrading and maintaining existing lightning protection systems to prevent roof cover
<br />damage.
<br />• Converting traffic lights to mast arms.
<br />Structural Mitigation Projects —Residential
<br />• Reinforcing garage doors
<br />• Inspecting and retrofitting roofs to adequate standards to provide wind resistance.
<br />• Retrofitting with load -path connectors to strengthen the structural frames.
<br />4.3.12.13. Recovery
<br />Recovery from non -convective high winds can take weeks and may be complicated by a combination of
<br />cold weather, power outages, fallen trees, ice, or snow. In forested areas, logging activities may be
<br />significantly impacted, and fuel loads may exacerbate the potential for wildland fire. In addition to power
<br />outages, persistent wind loading on structures has at times caused gas line ruptures.
<br />4.3.12.14. References
<br />Ashley, W. S., & Black, A. W. (2008). Fatalities associated with nonconvective high -wind events in the
<br />United States. Journal of Applied Meteorology and Climatology, 47(2), 717-725.
<br />lacopelli, A. J., & Knox, J. A. (2001). Mesoscale dynamics of the record -breaking 10 November 1998 mid -
<br />latitude cyclone: A satellite -based case study.National Weather Digest, 25(1/2), 33-42.
<br />Knox, J. A., Frye, J. D., Durkee, J. D., & Fuhrmann, C. M. (2011). Non -Convective High Winds Associated
<br />with Extratropical Cyclones. Geography Compass, 5(2), 63-89.
<br />Knox, J. A., & Lacke, M. C. (2011). Death from a clear blue sky: extreme nonconvective high winds.
<br />Earthzine.org (http://earthzine.org/2011/06/04/death-from-a-clear-blue-sky-extreme-non-
<br />convective-high-winds/)
<br />Lacke, M. C., Knox, J. A., Frye, J. D., Stewart, A. E., Durkee, J. D., Fuhrmann, C. M., & Dillingham, S. M.
<br />(2007). A climatology of cold -season nonconvective wind events in the Great Lakes region. Journal
<br />of Climate, 20(24), 6012-6022.
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