Both radar surfaces caught this storm: NEXRAD logged 0 hail signatures up to 2.5", and the radar-estimated size reached 1.75" aloft. At 2.5" — baseball — this is severe, roof-replacing hail: close to every roof inside the footprint becomes a claim candidate.
2.5"
≈ baseball · the largest NEXRAD radar signature264
1
1 hailOverview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
Largest hailstone — the top predictor of roof damage.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
The maps here read the same storm from two angles — point detections from NEXRAD, and modeled hail size aloft. Where the two disagree is informative: it marks where estimated size outran the signatures, or trailed them.
Where NEXRAD flagged hail as the storm passed — point signatures from the radar, which indicate hail overhead rather than confirm what landed.
The modeled maximum hail size across the swath, derived from radar aloft — the largest stone the storm could have supported, which is not necessarily what reached the ground.
This was Heimdal'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 Heimdal at 2.5" — the largest NEXRAD radar signature.
The Jul 9, 2026 convective day was bigger than Heimdal: the same system put hail over 944 other tracked cities, 98 of them in North Dakota. Nearest: Maddock (5 miles east, up to 2.75"); Harvey (9 miles west, up to 3.25"); Manfred (12 miles southwest, up to 2.5").
These maps are stills from Heimdal's Jul 9, 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.
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.
“Corrects previous hail report from Heimdal... changing it to Wellsburg. Public report relayed by broadcast media. Hailstones measured by ruler to be 2.5 inches. Radar a (BIS)”
— NOAA / SPC storm report
Reports came from Wellsburg — beyond Heimdal itself.
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.
$3.2M
Potential roof exposure — 264 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.Radar updates in real time, spotter reports appear on the map as they're filed, and the full Heimdal storm history — this Jul 9, 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
1 recorded storm day in Heimdal, ND