Hail Size Chart: From Pea to Softball Explained

Published 2026-07-14 · Updated 2026-07-14

Hail comes in many sizes, from tiny ice pellets the size of a pea to large stones resembling a softball. Understanding these classifications helps assess potential damage and interpret weather reports.

Introduction: Understanding Hail Sizes

Hail is a form of solid precipitation that can range dramatically in size, with significant implications for property and safety. Often described using comparisons to common objects, these descriptions help us visualize the scale of a hailstorm. This guide explains the common hail size chart, from small pea-sized stones to formidable softballs, and how these measurements are used in weather research and damage assessment.

What Happened / What It Is: The Hail Size Scale

Hailstones form when updrafts within thunderstorms carry raindrops upward into extremely cold regions of the atmosphere. The water freezes, and as it falls, it can be caught in updrafts again, accumulating new layers of ice before finally falling to the ground. The stronger the updraft, generally, the larger the potential hailstones.

Weather reports and historical data often use a descriptive scale to communicate hail size. Here are some common categories and their approximate diameters:

• Pea: Approximately 0.25 inches (6 mm) in diameter. Small and generally causes minimal or no significant property damage, though it can accumulate.
• Marble/Mothball: Approximately 0.5 inches (12 mm) in diameter. Can cause minor damage to sensitive crops or plants.
• Dime/Penny: Approximately 0.75 inches (19 mm) in diameter. Often considered the threshold for 'severe' hail by the National Weather Service (NWS) before 2010. Can cause cosmetic dents on vehicles and minor roof damage.
• Nickel: Approximately 0.88 inches (22 mm) in diameter.
• Quarter: Approximately 1.00 inch (25 mm) in diameter. This is the current NWS threshold for 'severe' hail. At this size, hail can cause significant dents in vehicles, damage to roofing materials, and can be hazardous to people and animals.
• Half Dollar: Approximately 1.25 inches (32 mm) in diameter.
• Walnut/Golf Ball: Approximately 1.75 inches (44 mm) in diameter. Hail of this size can cause major damage to vehicles, shatter windows, and severely damage roofs, potentially compromising structural integrity. It poses a serious risk to anyone caught outside.
• Hen Egg: Approximately 2.00 inches (51 mm) in diameter.
• Tennis Ball: Approximately 2.50 inches (64 mm) in diameter.
• Baseball: Approximately 2.75 inches (70 mm) in diameter. This size can cause catastrophic damage to property and is extremely dangerous.
• Tea Cup: Approximately 3.00 inches (76 mm) in diameter.
• Softball: Approximately 4.00 inches (100 mm) in diameter. Hail of this magnitude is extremely rare but capable of immense destruction, including punching through roofs and causing severe injuries or fatalities.
• Grapefruit: Approximately 4.50 inches (114 mm) or larger. Among the largest hailstones ever recorded, causing extreme devastation.

These comparisons provide a quick and intuitive way to understand the potential impact of a hailstorm, although precise measurements are often collected by meteorologists and storm chasers. StormAuditor uses reported hail sizes alongside other meteorological data to understand historical weather events.

Methodology Tie-In: How Hail Data is Collected and Used

StormAuditor compiles historical weather data from a variety of sources, including radar observations, storm reports from trained spotters, and official measurements from meteorological agencies. When a hail event occurs, trained observers or the public report the size of hail using these common object comparisons or by providing actual measurements. Radar systems, particularly dual-polarization radar, can also estimate hail size and intensity, offering a broader view of a storm's characteristics.

To research specific hail events impacting a property, StormAuditor compiles these reports and radar data. Our hail analysis tool allows you to investigate reported hailfall at a specific address and date of loss. This provides a comprehensive view of hail activity, helping to assess the likelihood and potential severity of hail-related damage. Our methodology for hail analysis provides more detail on how this data is integrated and interpreted.

Honest Limitations in Hail Data

While hail size charts and reporting methods are valuable, there are inherent limitations. Reports are often subjective, relying on visual estimates or comparisons rather than precise measurements. The distribution of hail can be highly localized, meaning that hail reported in one area may not have fallen with the same size or intensity even a short distance away. Ground observations might also be delayed or incomplete, especially in sparsely populated areas. Radar estimates, while comprehensive, are still models and can have biases compared to ground truth. StormAuditor accounts for these factors by integrating multiple data sources and providing a range of possible scenarios and levels of certainty for past weather events.

Related StormAuditor Tools

• Address-Specific Hail Reports: Get detailed historical hail data for any property.
• Comprehensive Date of Loss Research: Explore all significant weather events impacting a property on a specific date.
• Understanding Wind Damage: Learn about wind speeds and their impact, often co-occurring with hail events.
• How We Analyze Weather Data: Dive deeper into StormAuditor's scientific approach to historical weather analysis.
• View a Sample Report: See an example of the insights StormAuditor provides.

Frequently Asked Questions (FAQ)

Q: What is considered 'severe' hail?

A: The National Weather Service (NWS) defines severe hail as having a diameter of 1 inch (quarter-sized) or larger. This is the threshold at which hail is considered capable of causing significant property damage and potential injury.

Q: How is hail size measured if not by common objects?

A: For more precise measurements, hail can be measured with a ruler or calipers. Meteorologists and storm chasers often do this for official storm reports. Radar systems estimate size based on reflectivity and other characteristics of the ice particles.

Q: Can pea-sized hail cause damage?

A: While individual pea-sized hailstones (0.25 inches) typically do not cause significant damage to robust structures, a prolonged fall of pea-sized hail can accumulate and cause damage to sensitive crops, plants, or fine finishes, and can make roads slippery.

Q: Does all hail fall straight down?

A: No. Hailstones are influenced by wind within a thunderstorm. Strong winds can cause hail to fall at an angle, increasing the likelihood of damage to vertical surfaces like siding and windows.

Q: How can I find out the hail size at my property on a specific date?

A: StormAuditor's hail analysis tool allows you to enter an address and date to receive a comprehensive report on reported hail activity, including estimated sizes, in that specific area.