Hail size 1.75"
4 N Kamrar Hamilton County
“(DMX)”
— NOAA / SPC storm report
Hail in Blairsburg Jul 20, 2026
Hit 14 days agoThe radar-estimated size surface caught this storm, reaching 2" aloft. NEXRAD logged no point detections over Blairsburg this day. At 2" — tennis ball — this is severe, roof-replacing hail: close to every roof inside the footprint becomes a claim candidate.
Largest hailstone
2"
≈ tennis ball · radar-estimated size aloft Homes in the hail footprint
1,241
Ground reports
1
1 hailBlairsburg's only recorded storm in the last 12 months
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
4.8 /10
- Hail size
- 50 /100
- Homes exposed
- 62 /100
- Ground truth
- 17 /100
Largest hailstone — the top predictor of roof damage.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
How Blairsburg 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.
Radar-estimated hail size
Maximum hail size as estimated from radar aloft. Treat it as the storm's ceiling — the largest supportable stone — rather than a ground measurement.
Max size
2"
Only the radar-estimated size surface resolved for Jul 20, 2026 — this storm produced no NEXRAD point detections over Blairsburg, so there is one map to show, not two.
Where Jul 20, 2026 sits in Blairsburg's hail record
This was Blairsburg's 1st recorded hail day — the first hail day in our records for the city. By severity it ranks 1st of the 1 storms we have logged here. Radar put the day's largest stone over Blairsburg at 2" — radar-estimated size aloft.
The Jul 20, 2026 convective day was bigger than Blairsburg: the same system put hail over 553 other tracked cities, 178 of them in Iowa. Nearest: Kamrar (10 miles south, up to 2"); Webster City (10 miles southwest, up to 1.75"); Dows (10 miles northeast, up to 1.25").
These maps are stills from Blairsburg's Jul 20, 2026 storm. In the Overview app the same surfaces are live — radar updating in real time, radar-estimated hail size as it forms, and NWS spotter reports pinned where they're filed — with a radar replay you can scrub back over any past day.
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.
Hail reports
1 report
Storm forensics
Read from the arrival times and locations of the NOAA ground reports,
not a radar-measured storm track.
How the storm moved
Reports came from Kamrar — beyond Blairsburg itself.
What 2" hail means for Blairsburg roofs
Two-inch-plus hail punctures shingles, breaks skylights and windows, and dents anything soft. In the core of a footprint like this, close to every roof is a candidate for an insurance claim. Speed decides who writes those jobs.
What this storm is worth to a roofer
$15M
Potential roof exposure — 1,241 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Illustrative jobs
6 jobs
Illustrative work
~$90K
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.
Track hail over Blairsburg on the live map
Radar updates in real time, spotter reports appear on the map as they're filed, and the full Blairsburg storm history — this Jul 20, 2026 storm included — sits underneath. When you're ready, draw this storm's footprint and pull highly accurate homeowner contact information for every address inside it.
Highly accurate contact information starting at $0.23 per address — every contact included. Digital leads cost $15–$40. Start with a 7-day free trial — no credit card required. See pricing
Blairsburg hail history
← All hail in Blairsburg 1 recorded storm day in Blairsburg, IA
A storm day here is a convective day — it runs from noon to noon
UTC, so late-night hail is grouped with the afternoon storm that
spawned it rather than split across two calendar dates. Ground
reports are public-domain observations from the NOAA Storm
Prediction Center. Radar surfaces are detections and estimates,
not confirmed damage. Last updated Aug 3, 2026.