Hail Risk in the US: How FEMA Scores It and How to Prepare

Written by Dvir · Data: FEMA National Risk Index v1.20 · Updated August 4, 2026

Hail rarely kills anyone in the United States, yet it is one of the country’s most expensive weather hazards — insured hail losses now routinely exceed $10 billion a year, driven by a collision of bigger metro areas, pricier roofs, and solar panels meeting the same old storms. A single hailstorm over a city can damage hundreds of thousands of roofs and vehicles in twenty minutes. In the National Risk Index, hail (hazard code HAIL) accounts for roughly $3.2 billion in expected annual loss across 3,126 counties.

What counts as hail risk

Hail forms when thunderstorm updrafts carry raindrops into sub-freezing air repeatedly, layering ice until the stone falls. Severe-criteria hail starts at 1 inch (quarter size); damage escalates sharply with size because impact energy scales with mass and speed — golf-ball hail (1.75”) dents cars and cracks older shingles, baseball hail (2.75”) punctures roofs, and softball stones fall at highway speeds.

The US sees more large hail than anywhere on Earth, courtesy of the same Great Plains storm machine that produces tornadoes. “Hail Alley” — the corridor from Texas through Oklahoma, Kansas, Nebraska, and eastern Colorado/Wyoming — averages 7–9 hail days a year. The costliest events, though, happen when that climatology intersects a metro: the 2024 Dallas–Fort Worth storms, Calgary-style events over Denver, and San Antonio’s 2016 storm (~$1.4B) are the modern pattern.

How the NRI measures it

FEMA combines each county’s exposure (building value, population, vehicles implicitly through loss history, and crops), annualized hail frequency from NOAA storm reports, and historic loss ratios into an Expected Annual Loss scored 0–100 relative to all counties. Frequency times rooftops is the formula in practice — which is why the ranking is dominated by big metros inside Hail Alley.

Where the risk concentrates

Texas metros own the top of the table: Dallas County (score 100, ~$128M expected annual loss, ~9 hail events/year) and Tarrant County (Fort Worth, ~$113M) lead, with Bexar (San Antonio), Collin (north Dallas suburbs), and Denver County, CO (~$72M, ~8 events/year) close behind. The Front Range from Denver to Cheyenne has the nation’s highest large-hail frequency; Oklahoma City, Wichita, Omaha, and Minneapolis all carry heavy ratings. Agricultural hail loss — a crop-shredding subset — concentrates in the Plains wheat and corn belt.

How to read your county’s score

Hail risk translates almost directly into roof economics. In a Very High county, your roof will statistically take damaging hail during its service life, your auto comprehensive premium already prices local hail, and your homeowners policy likely carries a separate (higher) wind/hail deductible — often 1–2% of dwelling coverage rather than a flat amount. Check that deductible; many homeowners discover it only at claim time.

What actually reduces the risk

  • Buy the impact-rated roof. Class 4 (UL 2218) impact-resistant shingles or metal roofing survive most hail that destroys standard shingles, and insurers in hail states offer meaningful premium discounts — over a roof’s life the upgrade typically pays for itself in Hail Alley. The newer IBHS severe-hail standard is stricter still.
  • Garage the vehicles. Cars are the other half of hail losses; covered parking during spring storm season is free mitigation. If a warned storm approaches and you have no garage, blankets beat nothing.
  • Protect the glass and the panels: skylight covers, and for solar arrays, panels rated to UL 61730 large-hail impact — hail is now the leading cause of utility-scale solar losses.
  • After the storm, control the claim: photograph damage promptly, get an independent roofer’s inspection, and be wary of storm-chasing contractors demanding assignment of benefits — post-hail fraud is an industry of its own.
  • Watch the watches. Severe thunderstorm warnings mention expected hail size; golf-ball-plus warnings are your cue to move cars and stay away from windows. Injuries are rare and almost always people caught outside.

The hailstorms that made it an insurance problem

Hail has no famous death tolls, so its history is written in loss ledgers rather than memorials.

Fort Worth, May 1995 (“Mayfest”). A supercell dropped grapefruit-sized hail on an outdoor festival with tens of thousands of people in the open. More than a hundred people were injured — one of the few American hailstorms to cause mass casualties — and the property loss ran into the billions in today’s dollars. It is still the case study for why large-hail warnings matter at outdoor events.

Denver metro, July 1990 and again in May 2017. The Front Range is the highest-frequency large-hail zone in the country, and Denver’s growth has repeatedly turned ordinary Front Range storms into billion-dollar events. The 2017 storm damaged roughly 150,000 vehicles and tens of thousands of roofs in a single afternoon.

San Antonio, April 2016. One storm produced insured losses on the order of $1.4 billion, driven almost entirely by roofs and vehicles in a dense metro. No fatalities, no dramatic footage, and one of the costliest severe-weather events in Texas history.

The 2024 Dallas–Fort Worth season continued the modern pattern: hail losses rising faster than hail frequency, because what sits under the storms — bigger houses, more expensive roofing systems, more vehicles, and now rooftop and utility-scale solar — is worth far more than it used to be.

The consistent finding across all of them is that hail is a frequency-times-exposure problem. The storms are not obviously getting worse; the things they land on are getting more valuable, and roof replacement costs have risen faster than general inflation.

Season, geography, and the shape of Hail Alley

  • Peak season is March through June, shifting north as spring advances: Texas and the southern Plains in March and April, Kansas and Nebraska in May, the northern Plains and upper Midwest in June. The Front Range’s large-hail season runs roughly May through August.
  • Time of day is strongly clustered. The large majority of severe hail reports occur between mid-afternoon and mid-evening, when the atmosphere is most unstable. Nocturnal hail happens but is much rarer.
  • “Hail Alley” — eastern Colorado and Wyoming, western Nebraska and Kansas, the Oklahoma and Texas panhandles — averages seven to nine large-hail days per year, the highest frequency on Earth outside a few spots in Argentina and northern India. The high plains elevation puts the freezing level closer to the ground, so stones melt less on the way down.
  • The costly events are elsewhere. The dollar losses concentrate where that climatology overlaps metropolitan development: Dallas–Fort Worth, San Antonio, Oklahoma City, Wichita, Omaha, Denver, Colorado Springs, and Minneapolis. A storm dropping baseball hail on rangeland produces a NOAA report and no claims.
  • Crop hail is its own market. In the Plains wheat and corn belt, a single storm can strip a season’s yield from a field in minutes, which is why crop-hail insurance exists as a distinct product from federal crop insurance.

Size drives damage non-linearly. One-inch (quarter-size) hail is the severe threshold and marks up older shingles. At 1.75 inches (golf ball) vehicles dent and aging roofs crack. At 2.75 inches (baseball) hail punctures roof decking, breaks windows, and destroys siding. Above three inches stones fall at highway speeds and are genuinely dangerous to anyone outdoors.

Roofing and vehicle decisions that actually matter

Hail mitigation is unusually concrete: it is mostly a roofing purchase and a parking habit.

  • Buy a Class 4 impact-rated roof. The UL 2218 test rates roof coverings Class 1 through 4 by resistance to steel-ball impact; Class 4 is the top rating and covers impact-modified asphalt shingles, most metal roofing, and certain synthetic products. In hail states, insurers commonly offer meaningful premium discounts for Class 4, and over a roof’s service life in Hail Alley the upgrade frequently pays for itself. Ask for the discount explicitly — it is often not applied automatically.
  • Know that the IBHS standard is stricter. The Insurance Institute for Business & Home Safety tests roofing with actual ice, at real impact velocities, and publishes performance ratings that diverge from UL 2218 results. If you are choosing between Class 4 products, the IBHS impact ratings are the better guide.
  • Metal roofing dents but rarely fails. It is the most durable common choice against hail, at the cost of cosmetic denting — which matters for resale and for how the claim is written. Some policies now exclude cosmetic damage to metal roofs; read that endorsement carefully.
  • Cover the cars. Vehicles are roughly half of hail losses in metro storms. A garage, carport, or even a parking structure during warned storms is free mitigation. If nothing else is available, heavy blankets or a fitted hail cover beat bare sheet metal.
  • Protect glass and skylights. Skylights are a common leak path after hail; screens or impact-rated glazing help. Impact-resistant window glass matters where large hail is common.
  • Solar needs a hail rating. Hail is now a leading cause of loss for both rooftop and utility-scale solar. Look for panels tested to the large-hail impact levels in UL 61730 / IEC 61215, and consider mounting angle — steeper tilt sheds impacts better than flat.
  • Screen the HVAC condenser. Hail guards on outdoor AC units are cheap and prevent a very common secondary loss that people forget to claim.

Insurance: deductibles, depreciation, and fraud

Hail is covered by standard homeowners insurance. Almost every dispute is about how much.

  • The wind/hail deductible is usually separate and larger. In hail-prone states policies commonly carry a percentage deductible — often 1–2% and sometimes more of the dwelling limit — that applies specifically to wind and hail. On a $400,000 dwelling limit, 2% is $8,000 before the policy pays anything. Many homeowners learn this at claim time. Check your declarations page now.
  • Actual cash value roof endorsements are spreading. A growing number of carriers in hail states now settle roof claims at depreciated value rather than replacement cost, or apply a roof-age schedule. On a fifteen-year-old roof this can cut the payout dramatically. If you have the choice, replacement cost on the roof is worth the premium.
  • Cosmetic damage exclusions waive coverage for dents that do not affect function — relevant for metal roofs, siding, gutters, and garage doors.
  • Vehicles are covered under comprehensive auto, not homeowners, with their own deductible. Comprehensive is the coverage people drop to save money and then need.
  • Document the storm, not just the damage. Note the date and time, save the NWS warning text, and photograph hailstones next to a coin or ruler. Insurers dispute which storm caused which damage, and dated evidence settles it.
  • Beware post-storm contractor fraud. Door-knocking crews arriving within hours of a storm, offering to “waive your deductible” or asking you to sign an assignment of benefits, are the defining fraud pattern of this hazard — and waiving a deductible is illegal in many states. Get an independent inspection from an established local roofer, and let your insurer’s adjuster inspect before signing anything.

Before, during, and after

Before. Know your wind/hail deductible and whether your roof is settled at replacement cost or actual cash value. Photograph your roof, siding, and vehicles in undamaged condition so you have a baseline. Enable Wireless Emergency Alerts and a weather app that reports expected hail size in severe thunderstorm warnings — that number is your action trigger.

During. When a warning mentions golf-ball or larger hail, move vehicles under cover and stay away from windows, especially on the storm-facing side. Hail injures people who are outside; there is no reason to be. Close blinds and curtains to contain glass if a window breaks. Do not go outside to move a car once the hail has started.

After. Inspect from the ground and from inside the attic — do not climb onto a hail-damaged roof, which may have loose granules and hidden punctures. Look for dented gutters, downspouts, vents, and AC fins as proxies: if the soft metal is dented, the roof was hit. Photograph everything with a size reference, file promptly (most policies have a reporting window, and some states now impose one- or two-year deadlines on hail claims), and get a licensed local roofer’s written assessment. Tarp any active leaks to prevent further damage — insurers expect reasonable mitigation and will pay for it — but hold off on permanent repairs until the adjuster has seen it.

Sources

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