Hail in Johnstown · Jul 17, 2026
The estimated-size surface reached 1" aloft; NEXRAD logged no point detections over Johnstown that day. Open it on the live map to see the swath over the streets.
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Convective day · Jul 17, 2026 · noon–noon UTC
Severity
The 4th most severe storm Johnstown has seen in the last 12 months
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
- Peak hail signal
- 25 /100
- Homes exposed
- 59 /100
- Ground truth
- 0 /100
Largest radar-indicated size — a signal of damage potential, not confirmation.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
Evidence / storm surfaces
How Johnstown saw the hail — from two instruments
We map this storm two ways: the NEXRAD radar signatures the storm produced overhead, and the radar-estimated size of the hail in the air. The two surfaces don’t have to match — where they diverge is where estimated size aloft ran ahead of, or behind, what the signatures caught.
Estimated size field Maximum hail size as estimated from radar aloft. Treat it as the storm's ceiling — the largest supportable stone — rather than a ground measurement.
Only the radar-estimated size surface resolved for Jul 17, 2026 — this storm produced no NEXRAD point detections over Johnstown, so there is one map to show, not two.
The storm in context
Where Jul 17, 2026 sits in Johnstown's hail record.
This was Johnstown's 5th recorded hail day, arriving 14 days after the Jul 3, 2026 storm. By severity it ranks 4th of the 7 storms we have logged here. Radar put the day's largest stone over Johnstown at 1" — radar-estimated size aloft.
The Jul 17, 2026 convective day was bigger than Johnstown: the same system put hail over 415 other tracked cities, 22 of them in Ohio. Nearest: Marysville (29 miles west, up to 0.5"); Somerset (34 miles southeast, up to 0.5"); Zanesville (36 miles east, up to 0.5").
These maps are stills. In the app this date is one of 7 Johnstown storm dates on a live map — both surfaces, the reports, and a replay — and the same map is where you draw the swath. This page rebuilds nightly.
Ground reports
What people on the ground reported
These are storm reports filed with the National Weather Service and released through the NOAA Storm Prediction Center — public-domain observations from spotters, the public, and NWS surveys. We quote each one exactly as filed.
For this storm over Johnstown, the NWS report log is empty — a common outcome, since ground reports only happen when someone witnesses the hail and takes the time to call it in. The detection record for the date lives in the radar maps above.
Damage-capable hail signal
What 1" hail means for Johnstown roofs.
Quarter-size and larger hail can bruise asphalt mats, remove granules, and dent exposed soft metal. The mapped footprint identifies an inspection priority area — it does not identify which individual roofs, if any, sustained damage.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
Potential roof exposure
$10M
Potential roof exposure — 852 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 4 jobs
- Illustrative work
- ~$60K
Close just 0.5% of the 852 homes in this footprint at the average $15,000 roof job. Illustrative math, not a projection — your results depend on your outreach and how the market responds.
Claim window
July 2028
Claims from this storm can typically be filed until around July 2028 — the window to reach these homeowners while it's still open. Deadlines vary by policy and state.
Names and phones for every home in the footprint: at most $179 on top of the $150 plan.
Johnstown hail history
Other storms in Johnstown.
Estimated-size surface Aug 10, 2026
0.75"
Estimated-size surface Jul 21, 2026
1.75"
Estimated-size surface Jul 3, 2026
1"
Estimated-size surface Jun 6, 2026
0.5"
Estimated-size surface Apr 22, 2026
1.25"
Estimated-size surface Mar 22, 2026
2.25"The next storm won’t wait for you.
Set your territory and alerts today. When hail hits, use Overview to choose your streets and get moving.
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