On the evening of April 28, 2026, hailstones the size of grapefruits hammered Springfield, Missouri, for more than two hours straight. The largest stones measured 4.75 inches across, big enough to punch through car windshields and crack roof decking. Across the metro area, vehicles sat cratered in driveways, windows lay in shards on living room floors, and entire neighborhoods looked as though they had been pelted by a dump truck’s worth of river rock.
Within weeks, a peer-reviewed study published in Nature offered a scientific explanation for why storms like this one may be getting worse. The research projects that hailstorm damage potential worldwide could rise by 36.5 to 42.1 percent before the end of the century, driven not by more storms but by bigger stones. The mechanism is straightforward: warmer air near the surface holds more moisture, and that extra energy feeds updrafts powerful enough to keep hailstones suspended longer, letting them grow before they finally fall.
Springfield’s destruction and the study’s projections landed almost simultaneously, creating one of the clearest real-world illustrations yet of what climate scientists have been warning about for years.
What Springfield experienced
The National Weather Service office in Springfield documented the event in an official event summary, reporting two hours and twenty minutes of continuous severe hail across the metro area. That duration alone is extraordinary; most severe hail events last minutes, not hours. The largest stones, at 4.75 inches, exceeded the diameter of a standard softball and approached the size of the current U.S. record holder, a stone that fell in Vivian, South Dakota, in 2010 and measured 8 inches across.
Damage was widespread. The NWS narrative describes shattered vehicle windows, dented body panels, and structural roof damage across multiple neighborhoods. As of late June 2026, however, no consolidated dollar-level damage totals or insurance payout figures have appeared in NOAA’s federal Storm Events Database, the standard repository where local Weather Service offices log severity, location, and reported costs for each event. Insurance companies have not released a public tally of claims, so any specific loss estimate at this point would be speculative.
What the Nature study found
The study, titled “Rising global hail damage potential in a warming world,” shifts the focus from how often hailstorms occur to how large the stones inside them become. Using global climate models run under multiple emissions scenarios, the researchers project a 36.5 to 42.1 percent increase in hailstorm damage potential by the late 21st century, as detailed in the published research article.
The physical chain works like this: as surface temperatures climb, the lowest layers of the atmosphere hold more water vapor, measured as specific humidity. That moisture acts as fuel. When a thunderstorm’s updraft taps into it, the resulting energy surge can keep hailstones cycling inside the storm cloud for additional minutes, adding layer after layer of ice. The result is fewer small stones that melt on the way down and more large ones that survive the fall intact.
A companion editorial explainer in Nature emphasizes that the damage-potential metric is the study’s most consequential contribution, because it integrates hailstone size, storm intensity, and population exposure rather than simply counting events. Earlier classification work that fed into the modeling analyzed thousands of potential severe hailstorms detected by satellite-based precipitation radar and sorted them into five distinct environmental types, giving the researchers a global lens rather than a regional one.
Why bigger does not mean more frequent
One of the study’s most important nuances is that warming does not necessarily produce more hailstorms. It may actually reduce the total count. A review published in Nature Reviews Earth & Environment has outlined the competing forces at work: while warmer, moister air supplies more energy for large hailstone growth, it also raises the melting layer, the altitude at which ice begins to turn to water on its way to the ground. A higher melting layer destroys smaller stones before they reach the surface.
The net effect favors survival of only the largest, most damaging hailstones. For insurance modeling, that distinction is critical. Fewer but bigger stones concentrate damage in ways that strain loss reserves differently than widespread small hail that mostly scuffs shingles and dings gutters. A single grapefruit-sized stone can total a car roof; a thousand pea-sized pellets might not trigger a single claim.
The Nature study does not claim that climate change caused the specific Springfield storm. Instead, it shows that the atmospheric setup required to produce 4.75-inch hailstones, warm and humid low-level air feeding an exceptionally strong updraft, is becoming more common. Events like Springfield are not yet the norm, but they are migrating from the far edge of the probability curve toward its center.
Gaps that still need filling
Several pieces of the picture remain incomplete. The Storm Events Database entry for the April 28 event has not yet been populated with county-level damage figures, and the NWS narrative stops short of dollar estimates. Without those numbers, comparing Springfield’s losses to other major U.S. hail events is difficult.
The Nature study’s methodology references hour-by-hour radar trajectory data used to validate hailstone sizes against the broader U.S. record, but that data has not been publicly released in the article’s supplementary materials. The five global hailstorm environment types drawn from the earlier classification study are described in general terms, yet the precise way they were mapped onto the new damage projections is not fully detailed. These gaps do not undermine the central finding, but they do limit independent replication and fine-grained regional analysis for now.
There is also the question of historical context. Springfield sits squarely in the central U.S. hail corridor, a band stretching from Texas through the Great Plains and into the upper Midwest where warm, moist Gulf air collides with dry air from the Rockies. Whether the city has experienced comparable events in the past, and how the frequency of very large hail in this corridor has changed over recent decades, are questions the study’s global scope does not fully address at the local level.
What this means for homeowners, insurers, and cities
The practical implications are immediate, even though the study’s headline projection is a late-century figure. The physical mechanism behind bigger hailstones, warmer and moister low-level air, is already operating. Springfield’s 4.75-inch stones did not need another 70 years of warming to form.
For homeowners in hail-exposed regions, the first step is checking whether current insurance policies carry hail-specific deductibles, which have become increasingly common as insurers respond to rising claims. Roof impact ratings, garage availability, and local building codes for impact resistance all influence how much of a future storm’s cost lands on individual families. Upgrading to impact-resistant roofing materials, rated Class 4 under UL 2218 testing, can reduce both damage and premiums in many states.
For insurers and reinsurers, the emerging science argues for updating catastrophe models to account for shifts in hailstone size distributions, not just storm frequency or geographic footprint. Portfolios concentrated in fast-growing suburbs across the Great Plains and Midwest may carry more exposure than legacy loss records suggest, particularly if those records undercount the largest stones or lack precise damage tallies.
Local governments have their own levers. Building codes can mandate impact-resistant materials on new construction, especially for critical facilities like hospitals, emergency operations centers, and schools. Zoning decisions that cluster high-value assets, such as car dealerships and logistics hubs with large vehicle fleets, should factor in the growing probability of giant-hail days. Public warning systems and community shelters are typically designed with tornadoes and straight-line winds in mind; the Springfield experience suggests that extreme hail deserves a more prominent seat at the severe-weather planning table.
Where the science goes from here
The Springfield storm and the Nature study do not prove that every future spring will bring record-breaking hail. What they do is establish, with peer-reviewed modeling and ground-level evidence arriving in the same season, that the ceiling on how destructive hail can be is rising. The largest stones are getting larger, and the atmospheric conditions that produce them are becoming more frequent.
For communities across the central United States, the question is no longer whether grapefruit-sized hail is possible. Springfield answered that on April 28. The question now is how often it will happen, and whether roofs, insurance pools, and emergency plans will be ready when it does.
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*This article was researched with the help of AI, with human editors creating the final content.
