Per-city wind zone · San Patricio County

Sinton, TX wind zone & TWIA tier

Sinton is San Patricio County seat; TWIA territory, near-coastal exposure. This page summarizes the ASCE 7-16 design wind speed, TWIA windstorm coverage status, hurricane evacuation tier, and what those mean in practice for new roofing, window, fence, shutter, or other exterior installs here.

Inside TWIA territory

Sinton, Texas

San Patricio County · Coastal Bend region

Design wind speed

135-145 mph

ASCE 7-16 Risk Cat II

TWIA windstorm

REQUIRED

WPI-8 cert needed

Hurricane evac tier

Tier C

Evacuates last

Salt-air exposure

Near Coastal

Galvanized hardware recommended

What this means for new work in Sinton

Inside TWIA territory. Sinton (San Patricio County) is one of the 14 first-tier coastal counties covered by the Texas Windstorm Insurance Association per Texas Insurance Code Chapter 2210. Any new roofing, window, or exterior door install needs a WPI-8 Certificate of Compliance from a TDI-approved inspector to keep windstorm policy coverage active. Skip the WPI-8 and the next windstorm claim gets denied.

Near-coastal salt-air on east winds. Galvanized fasteners and primer-coated exterior steel last years longer than mill-finish — the salt reaches this far inland on most east-wind days.

Hurricane evacuation Tier C. Sinton is on the formal evacuation list — last to evacuate, but on the list. August-October projects should plan for a possible 24-48 hour weather hold per major Gulf storm.

Verified Coastal Bend contractors who work Sinton

For pros that actually understand Sinton's TWIA + WPI-8 requirements:

Hurricane shutters pros in Sinton — verified, licensed, WPI-8 experienced
Roofing pros in Sinton — verified, licensed, WPI-8 experienced
Windows pros in Sinton — verified, licensed, WPI-8 experienced
Garage doors pros in Sinton — verified, licensed, WPI-8 experienced
Generators pros in Sinton — verified, licensed, WPI-8 experienced
Fence pros in Sinton — verified, licensed, WPI-8 experienced

All routed through NPCLocal — verify license, insurance, and WPI-8 experience before any work starts.

Look up a specific address

The values above are county-level. ASCE 7-16 wind speed at YOUR specific lot may be on the higher or lower end of the 135-145 mph range depending on proximity to the coast and local terrain. For an exact reading, use the address lookup on our home page or go straight to ATC Hazards by Location — the canonical ASCE source.

Related Coastal Bend tools

⛈️ Sinton live weather — current conditions, 7-day forecast, NWS alerts for Sinton
🌀 Address-level wind zone lookup — apex tool
📞 NPCLocal directory — verified Coastal Bend service-provider listings

Sources

Texas Windstorm Insurance Association
Texas Department of Insurance — Windstorm Inspection (WPI-8)
ATC Hazards by Location — ASCE 7-16 wind speed (canonical)
Texas Division of Emergency Management — evacuation tiers
Texas Insurance Code §2210 — TWIA statutory definitions

Disclaimer

Informational summary based on publicly published TWIA + ASCE + TDEM data. Not a substitute for an ATC Hazards site report or a TDI-licensed engineer's design. For permit applications or insurance documentation, always confirm with the official .gov sources above.