What Size Hail Damages a Car?

No published source sets a hail size below which a car is safe, so check the car after any hail. Larger stones do more damage, and shallow dents are hard to see in flat light.

So the useful question after a storm is not only how big the hail was. It is what your panels actually show. The size chart helps with the first part. Your own eyes, and then a scan, settle the second.

How hail size is measured

Hail is measured in inches across, and the National Weather Service ties each size to an everyday object so you can picture it. This is the NWS hail size chart:

• Pea: 0.25 inch
• Penny or dime: 0.75 inch
• Quarter: 1.00 inch
• Half dollar: 1.25 inches
• Golf ball: 1.75 inches
• Tennis ball: 2.50 inches
• Baseball: 2.75 inches
• Grapefruit: 4.00 inches

When you read a storm report, this is the scale behind it. NOAA's storm reports give hail in inches, so a 1.75-inch report means golf ball hail. A report is one observation: one place, one time, one size. One storm usually produces many reports, and their sizes differ from one spot to the next.

On that chart, one size matters more than the rest to forecasters: the quarter.

The 1-inch line: what severe means

The National Weather Service calls a thunderstorm severe once it produces hail 1 inch in diameter or larger, about the size of a quarter, or wind gusts of at least 58 mph.

That is a forecasting line. It tells you a storm was serious. It does not tell you that smaller hail left cars alone.

The one study we found on smaller hail looked at roofs. The Insurance Institute for Business and Home Safety (IBHS) found that sub-severe hail, under 1 inch, falls far more often than severe hail and may slowly wear down asphalt shingle roofs. That finding is about shingles, not paint and sheet metal. We know of no published size line for car damage, so treat any size rule of thumb you hear as a guess, not a measurement.

What size does change is how much damage you are likely to find.

What hail size changes on a car

Larger hail does more damage. That much holds. Beyond it, a few things are worth knowing before you walk around the car:

• Small hail still counts. No source sets a safe size, and hail under the 1-inch severe line is still worth checking for. Shallow dents disappear in flat or overcast light, which is why a car can look clean from the porch and still carry damage.
• The roof takes the most hits. It is also the hardest panel to see from the ground. Pickups and SUVs make it harder.
• Rails and edges collect dents. Roof rails, pillars and the top edges of doors and fenders are easy to skip on a quick look.
• Paint decides the method. Paintless dent repair works when the paint is intact. Where a dent has cracked or chipped paint, that spot needs paint work, whatever size the stone was.

Big hail is not rare here. In NOAA's Storm Events Database, 131 of the 637 hail reports in the seven-county Kansas City metro from 2016 to 2025 were 1.75 inches or larger, about one in five. Recent storms reported up to 2.50 inches on May 19, 2025 and up to 3.00 inches on March 10, 2026. The Kansas City hail storm page covers what to do in the first days after one.

A reported size is still a reading from somewhere else, though.

Why the reported size may not match your car

A storm report is one person measuring hail at one place. Your car was somewhere else: an office lot, a street, a driveway a few miles off.

The May 19, 2025 storm produced 35 reports across five metro counties, with sizes up to 2.50 inches. That 2.50 is the largest single report, not the size everywhere. The stones that hit your car could have been larger or smaller than the number in the headline.

A database also holds only hail that someone measured and reported. A street with no report is not proof of a street with no hail.

If you want to look up a storm yourself, NOAA's Storm Events Database is the official record. It runs a few months behind: right now it covers storms through June 25, 2026, and anything later is not listed yet. NOAA also logs times in Central Standard Time all year, so in summer a listed time reads one hour early against your clock. For the metro, every hail day since January 2025 is in Kansas City hail storms 2025-2026.

So the car is a better source than the report. Here is how to check it yourself.

How to check your own car after a storm

• Wait for daylight. Small hail dents disappear in flat or overcast light. Bright, angled light shows them.
• Look along the panel, not at it. Stand at a corner and watch the reflection of a straight line, a roofline or a light pole, as you move. A dent bends that line.
• Go in order. Hood, roof, trunk lid, then the roof rails, pillars and the top edges of doors and fenders. Use a step stool to see the roof of a truck or SUV.
• Check the paint at each dent. Look for cracks or chips at the center. That decides whether a panel can be fixed without paint.
• Check glass and lights. Look over the windshield, mirrors and lamps for chips and cracks.
• Photograph at a low angle. Straight-on photos hide hail. Write down the date and where the car was parked. Standard policy language asks you to tell your insurer how, when and where the loss happened.

If you find a few dents by eye, the count often rises once the car is under shop lights.

Then decide what to do about it.

Let the scan settle it

A count by eye tells you there is damage. It does not tell you how much, or whether a claim is worth filing. If you are on the fence, read is minor hail damage worth fixing.

A free 3D scan at our Leavenworth shop takes about 10 minutes and documents every panel: dent counts, sizes and depths. With that in hand you can decide to claim, pay for it yourself or leave it, and you are deciding on your car's real numbers instead of the storm report's. Bring the storm date and where the car was parked, since standard policy notice covers when and where the loss happened. If you go ahead, a typical paintless repair takes 5-7 days, and your insurer can be billed directly. If the first estimate comes in light, the shop writes the supplement on the same claim.