Outer Houston-metro basic wind speed — typical 130-135 mph V_ult range per ASCE 7-22 (Montgomery, Fort Bend, northern Harris)

Per ASCE 7-22 Figure 1609.3(1) (the basic wind speed map for Risk Category II residential buildings), the outer ring of the Houston metro — Montgomery County, Fort Bend County, and the northern and western interior of Harris County (west of State Highway 146 and outside the City of Houston) — typically falls in the 130-135 mph V_ult contour band. The exact value at any specific address requires interpolation from the map or use of the ASCE 7 Hazard Tool because basic wind speed contours are drawn at 5-10 mph intervals and the specific number depends on distance from the coast. V_ult is the ultimate design wind speed (3-second gust at 33 feet, Exposure C) referenced by ASCE 7-16 and ASCE 7-22 for strength-design wind pressure calculations. These counties sit outside the TDI Designated Catastrophe Area per the TDI county boundary map (KB-D5-002), so the TWIA windstorm insurance program and the WPI-8 windstorm certificate of compliance (KB-D5-001) do not apply. Building-code authority comes from the local jurisdiction's adopted IRC edition with any local amendments — Montgomery County, Fort Bend County, and the cities of Sugar Land, Conroe, The Woodlands, Tomball, Spring, and Cypress each adopt and enforce their own code. Harris County itself does not regulate residential re-roofing in its unincorporated areas; city-incorporated portions of northern Harris (e.g., portions of Jersey Village, Tomball, Humble) regulate per their own adopted IRC. The wind speed is a building-code requirement; insurance premium implications belong with the homeowner's insurance carrier or agent. [Source: ASCE 7-22 Figure 1609.3(1); Texas Department of Insurance Designated Catastrophe Area county map; ASCE 7 Hazard Tool]