How does wind damage roofs in Georgia?

Georgia Weather · Updated October 13, 2026

Short answer. Most wind damage to Georgia roofs comes from thunderstorm downbursts, which the National Weather Service counts on about 19 days a year across north and central Georgia with a peak in July, and from the remnants of hurricanes such as Irma in 2017 and Helene in 2024. Wind gets under shingles whose sealant strips have weakened, creasing, tearing or removing them, and it drops trees onto houses.

When people picture wind damage, they picture tornadoes. In Georgia, the far more common culprit is ordinary straight-line wind from thunderstorms, plus the long hours of gusty wind that tropical systems drag inland. Neither gets the headlines, but together they account for most of the missing shingles, creased tabs and fallen limbs that roofers see in north Georgia.

Where Georgia's damaging winds come from

Summer thunderstorms and microbursts

The National Weather Service office in Peachtree City found that damaging wind is by far the most common severe weather event in its north and central Georgia warning area, averaging about 19 days a year, with more events in July than in any other month. Its explanation is specific to Georgia summers: most storms are short-lived pulse storms fed by the afternoon sun, and when they collapse abruptly they can release brief, damaging microbursts.

The National Severe Storms Laboratory (NSSL) defines a downburst as any localized strong wind caused by a thunderstorm downdraft. A microburst is a small downburst, less than about 4 km (2.5 miles) across, that typically lasts only 5 to 10 minutes but can produce winds that sometimes exceed 100 mph. NSSL classifies damaging winds as those above 50 to 60 mph and notes that thunderstorm wind damage makes up about half of all severe weather reports in the lower 48 states. That is why one street can lose shingles and trees while the next street over sees nothing.

Squall lines and cold season storms

Not all damaging wind comes in summer. The same NWS study found wind damage in every month of the year, and noted an unusual tendency in the February data for wind damage to peak in the morning just before sunrise, a reminder that winter storms do not follow the afternoon pattern. On rare occasions a long-lived line of storms becomes a derecho, which NSSL defines as a wind damage swath extending more than about 240 miles with gusts of at least 58 mph along most of its length.

Tropical remnants

NOAA's climate summary for Georgia notes that although the state rarely takes a direct hurricane landfall, the remnants of tropical systems can bring heavy rain and strong winds. Two recent storms show what that means for north Georgia:

Irma, September 2017. The NWS reported widespread sustained winds of 30 to 45 mph with gusts of 50 to 65 mph that downed numerous trees, many onto homes. Peak gusts included 64 mph at Hartsfield-Jackson airport, 51 mph near Suwanee, 50 mph near Gainesville and 48 mph near Jasper.
Helene, September 2024. The NWS post-storm report describes gusts of 50 to 80 mph across parts of east and central Georgia, a 75 knot gust (about 86 mph) at Brasstown Bald in the mountains, and millions of downed trees, with structures damaged or destroyed mostly by falling trees. The report adds that station data probably did not capture the true peak gusts.

Tropical wind is especially hard on roofs because it lasts for hours, often after a day of rain has softened the ground and loosened trees. Our guide to trees and your roof covers that side of the risk.

How wind actually takes shingles off

Wind does not push shingles off the roof so much as pull them. Air moving over the roof creates suction, strongest at the edges, corners, ridges and rakes. A shingle resists that with two things: its nails and the factory sealant strip that bonds each course to the one below. A technical review in Professional Roofing, the magazine of the National Roofing Contractors Association, explains that a sealed shingle's uplift resistance depends on factors including the shingle's rigidity and the bond strength of its self-seal strip.

When the seal holds, the shingle and the course below act as one piece. When it lets go, the loose edge catches the wind and flaps. Each flap bends the shingle along the nail line. After enough cycles the shingle creases, tears at the nails, or flies off. The tricky part is that a creased shingle often falls back flat after the storm and looks fine from the ground, even though its seal is broken and the next storm will finish it.

Age changes everything here. The Insurance Institute for Business and Home Safety (IBHS) reports from its roof aging farms that roof age is a crucial factor in asphalt shingle wind performance, and that shingles keep failing in hurricanes and severe thunderstorms at wind speeds well below design levels. Its work examines how age, climate, roof orientation and unsealing affect long-term performance.

What shingle wind ratings mean

Test	Top class	What it means
ASTM D3161 (fan test)	Class F	Shingles passed a two-hour test at a 110 mph air stream
ASTM D7158 (uplift calculation)	Class H	Rated for an ultimate design wind speed up to 190 mph under current editions (150 mph basic wind speed in the original version)

The same Professional Roofing review points out that ASTM D3161 itself states its results do not directly correlate to wind speeds experienced in service, and that ASTM D7158 classifications assume buildings 60 feet tall or less in typical terrain. In plain terms, a wind rating describes a new, properly sealed shingle installed exactly to the manufacturer's instructions. It is not a guarantee for a 15-year-old roof in a microburst, and warranty wind coverage usually depends on specific nailing patterns and starter strips. Building codes also tie required ratings to local design wind speeds, which your building department can confirm.

Checking your roof after a windstorm

Walk the yard for shingle pieces, ridge cap fragments and strips of granule-covered material.
Look along edges, rakes, ridges and hips for missing tabs or exposed underlayment.
Look for lines of shingles that sit slightly raised or out of alignment.
Check the attic and ceilings for new water stains after the next rain.
Do not climb the roof. Cover openings with a tarp only if you can do it safely from a ladder, otherwise call for help.

If you find damage, our sister site explains how insurers evaluate it in wind damage roof claims.

Documenting wind damage properly

Creased and unsealed shingles are exactly the damage an insurer's adjuster can miss from a ladder. Robust Roofing has earned a reputation as North Georgia's most trusted roofer for storm damage restoration in part because its team photographs those creases and broken seals up close, and its in-house licensed Property and Casualty adjuster scopes the claim and meets the carrier's adjuster. When a roof is replaced, Robust installs as a GAF certified contractor with the manufacturer's nailing and starter requirements, and backs the workmanship with a 50-year labor warranty.

Common questions

What wind speed damages a shingle roof?

There is no single number. NSSL classifies damaging thunderstorm winds as those above 50 to 60 mph, but IBHS research shows aged shingles often fail well below their rated speeds, especially once sealant strips have let go.

What is a microburst?

NSSL defines a microburst as a small downburst less than about 4 km across that usually lasts 5 to 10 minutes, with winds that sometimes exceed 100 mph. They are a common cause of localized roof and tree damage in Georgia summers.

What does a Class F or Class H wind rating mean?

Class F means shingles passed the ASTM D3161 fan test at 110 mph. Class H is the top classification under ASTM D7158, based on calculated uplift resistance. Both describe new, properly sealed shingles installed to the manufacturer's instructions.

Why do shingles look fine after a storm but leak later?

Wind can break a shingle's seal and crease it along the nail line, then let it fall back flat. The damage is hard to see from the ground, but the shingle no longer sheds water or resists the next storm.

Do hurricanes cause roof damage as far north as Atlanta?

Yes. NWS reports for Irma in 2017 and Helene in 2024 documented damaging gusts across north and central Georgia, with large numbers of trees falling onto homes.