The Extraordinary Measures Unveiling Hail's Billion-Dollar Impact

Hailstorms can leave suburban landscapes resembling warzones, their destructive force akin to a barrage from a shotgun. Andrew Shick, who leads Roofing USA in Illinois, frequently navigates through neighborhoods scarred by these icy projectiles, stunned each time by the extensive damage left in their wake.

On one particular trip earlier this year, Shick witnessed a farmstead in western Illinois where even robust metal rooftops bore the brunt of hail chunks as large as 3 inches, leaving destructive indentations. “The scene was almost surreal,” Shick reflects, recalling baseball-sized impressions left in the grass as a testament to the storm’s fury.

With several years in the roofing business, Shick observes an alarming rise in the frequency and intensity of hailstorms. The aftermath of such storms involves expensive repairs, exacerbated by inflation. Increased insurance deductibles catch many unprepared, often unaware until the damage is staring them in the face.

In 2024, the financial burden of hail damage in the United States surpassed other natural disasters like hurricanes and floods, culminating in an estimated $40 billion in expenditures. A mere 15 years ago, this figure was less than $1 billion annually, notes Tanya Brown-Giammanco, head of disaster and failure studies at NIST.

Hail formation occurs during storms when strong updrafts propel raindrops into frigid zones where they freeze. As the process repeats, hailstones grow until gravity brings them crashing to the ground. Despite technological advancements, predicting the size and frequency of hail remains challenging, and scientists are still working to understand their dynamics.

When asked if climate change influences hailstorm patterns, opinions are divided. While some hypothesize that warmer air could reduce hail occurrences, others suggest it might exacerbate conditions that lead to larger hail sizes. More people in the path of these increasing forces face the brunt of nature’s wrath.

Some homeowners like Becky Adams-Selin see opportunity amidst destruction. Following a severe hailstorm in Nebraska, Adams-Selin collected hail specimens, now stored in her freezer, saying, “This is new data!” As principal scientist at a research firm, she’s eager to investigate these frozen artifacts.

Adams-Selin is spearheading a collaborative initiative involving universities and organizations to study hail in its natural habitat. Earlier this year, teams observed and measured vast numbers of hailstones during fieldwork across key sensitive regions in the US, collecting data on hailstones up to 6 inches across.

Forecasting hail is fraught with uncertainties. Variability in hailstone shapes and sizes complicates predictions, particularly when differentiating between potential 2-inch or 5-inch stones—each carrying substantially different levels of impact.

While some evidence suggests a possible decrease in storm frequency with climate warming, other variables, such as storm energy derived from increased heat and moisture, could enhance hail’s severity. These convoluted factors complicate the association between global climate shifts and hailstorm characteristics.

Hailstorms are striking more constructed environments simply because expansion in infrastructure presents more targets. Adams-Selin notes, “With more buildings, hail’s likelihood of causing damage increases inherently.”

The ICECHIP research initiative in partnership with the Insurance Institute for Business & Home Safety (IBHS) has focused on evaluating how roofing products withstand hail. Notably, Adams-Selin, influenced by previous personal experience, noted differences in product performances during recent storms.

At Hague, Texas, ice balls are launched at construction materials to test resilience, influencing insurance coverage decisions regarding hail-induced damage versus wear and tear. This meticulous evaluation continues to shape damage claim assessments.

Using various simulators, Hague tests materials with ice balls that mimic real hailstones, compelling insurance firms to adjust their payout strategies for claims associated with roofing damage from hail.

While lab-generated ice projectiles offer consistency, natural hailstones are more irregular, leading some experts like Brown-Giammanco to advocate for enhanced classification levels, thus guiding consumers in selecting resilient roofing options. However, such advancements often come at a higher price.

Ultimately, not all homeowners have access to hail-resistant technologies, and extreme hail events can still defeat even the most advanced materials. Research persists, with scientists like Adams-Selin exploring innovative methods to better grasp hail dynamics using 3D-printed replicas to understand their fall velocity and trajectory.