One state, four wind worlds. Cape Hatteras at 155 mph on Exposure D sand. Piedmont metros near 110 mph. Mountain ridges flagged ASCE 7-22 special wind regions. Enter any NC ZIP for an instant design wind speed.
Free wind speed lookup. Output formatted for NC PE review and AHJ submittal.
A Hatteras oceanfront cottage and a ridge-top cabin outside Boone share one statewide code and almost nothing else.
The OBX barrier chain pairs the state's top wind contour with Exposure D on oceanfront sand. Three loads stack here: peak wind speed, Exposure D pressures, and coastal high-hazard overlays.
The Blue Ridge crest and Black Mountain gaps are flagged ASCE 7-22 special wind regions. Baseline speeds read low, yet ridge funneling demands a site-specific topography call above roughly 3,500 ft.
Risk Category II bands by region under ASCE 7-22 — single-family, most multifamily, retail, light commercial. The live ZIP lookup returns the exact value plus Cat I, III, and IV.
| Region | Counties / ZIPs | Risk Cat II | Exposure note |
|---|---|---|---|
| Outer Banks (coastal HH) | Dare (27954, 27959, 27948), Hyde, Currituck | 140–155 mph | Exposure D on barrier islands |
| Carteret beaches | Beaufort, Atlantic Beach, Emerald Isle | 135–145 mph | South of the OBX bend |
| Wilmington / SE coast | New Hanover (28401, 28403), Brunswick, Pender | 130–140 mph | Exposure C/D by parcel |
| Eastern NC inland | Pitt, Craven, Onslow, Wayne, Lenoir | 115–130 mph | Gradient inland from coast |
| Raleigh / Triangle | Wake (27601, 27603), Durham, Orange | 110–115 mph | Exposure C typical |
| Charlotte / W Piedmont | Mecklenburg (28202, 28204), Gaston, Union | 110–115 mph | Exposure B/C urban |
| Greensboro / Triad | Guilford (27401), Forsyth, Davidson | 110–115 mph | Central Piedmont |
| Foothills | Burke, Caldwell, Wilkes, Surry, Rutherford | 105–115 mph | Piedmont-to-mountain transition |
| Asheville / W mountains (special) | Buncombe (28801), Henderson, Madison | 105–110 mph | Special wind regions on ridges |
| High Country / NW mountains (special) | Watauga, Avery, Ashe, Mitchell | 105–110 mph | Site-specific above ~3,500 ft |
Four jurisdictions carry the bulk of OBX permit activity, each with its own coastal reality.
The most active OBX permit jurisdiction. Coastal high-hazard zoning along the oceanfront; CAMA overlay on many parcels.
Manteo 27954 · Nags Head 27959 · Kill Devil Hills 27948 · HatterasOcracoke Island plus the Engelhard mainland. Lower volume than Dare, but barrier-island exposure is comparable. Ferry access shapes scope.
Ocracoke · EngelhardThe northernmost OBX. New work clusters around Corolla and Duck; Carova reaches are 4WD-access only with limited road infrastructure.
Corolla · Duck · CarovaThe Engineering Report rides alongside a coastal foundation design, a flood-compliant utility mount, and a CAMA narrative. We handle the wind portion. CAMA, flood, and dune review stay with your coastal NC PE and design team.
WindLoadCalc calculates to ASCE 7-22 — the latest edition of the standard for wind.
NFRC certifies a window or door's measured Design Pressure. The calc returns the required C&C pressure per opening; you match it against the unit's NFRC-rated DP. Rated DP at or above the requirement passes for that location.
A Wilmington / New Hanover reviewer, a Charlotte / Mecklenburg reviewer, and an Asheville / Buncombe reviewer will not answer the edition question the same way. Coastal Brunswick and Pender often apply tighter scrutiny than a Piedmont office.
The calculator was live for each one and tracked the code conversation that followed.
Crossed into SE NC after a SC landfall. Damage read as inland river flooding — Lumberton, Princeville, Fayetteville. Each storm cycle pushed wind provisions toward the more conservative mapping now codified in ASCE 7-22.
Came ashore near Wrightsville Beach, then stalled and flooded Wilmington for days. Plan-reviewer scrutiny tightened across New Hanover, Brunswick, Pender, and Onslow.
Reached the western mountains as a tropical storm. Water-led catastrophe — landslides and river flooding at Chimney Rock, Lake Lure, Swannanoa, Spruce Pine. Wind drove ridge-exposed roof and wall losses.
Historical NC context: Floyd (1999), Isabel (2003), Irene (2011) — each fed an NCSBC, NCRC, or NC OSFM cycle the calc has run through.
Manteo 27954, Wilmington 28401, Charlotte 28202, or Asheville 28801 — the calc returns the ASCE 7-22 baseline plus an Exposure default.
Cat II covers most NC volume. Cat III adds larger schools and assembly; Cat IV is hospitals, fire/EMS, and EOCs.
D on OBX oceanfront, C across most suburban NC, B in dense Uptown canyons. Key in length, width, mean roof height, pitch, shape.
MWFRS for the frame and C&C zone-by-zone for openings and cladding. Every value cites its controlling factor.
Your North Carolina-licensed PE reviews, accepts, and seals. PE sign-and-seal is available through the firm's PE network.
No paid testimonials — a verifiable 24-year track record.
The four OBX counties carry the highest mapped speeds in NC.
WindLoadCalc applies ASCE 7-22, the most current and conservative edition of the standard.
NFRC ratings certify a fenestration unit's measured Design Pressure (DP).
Two effects compound on the OBX.
Portions are flagged as ASCE 7-22 special wind regions — but it is the topographic exception, not a blanket rule.
Yes. NC requires a North Carolina-licensed PE to seal structural drawings for permit.
Since 2002, with the calculator online in 2006 — one of the very first on the web.
Outer Banks 155 mph. Wilmington 135. Charlotte 110. Asheville 105 plus a special-wind-region prompt. One tool, one ZIP, one Engineering Report — or run the free wind speed lookup first.
Reviewed by WindLoadCalc's Florida-licensed in-house P.E. Online since 2006; covering North Carolina since 2002.