Hail size 1"
4 N Bismarck Burleigh County
“(BIS)”
— NOAA / SPC storm report
Hail in Bismarck Jun 29, 2026
Hit 35 days agoBoth radar surfaces caught this storm: NEXRAD logged 4 hail signatures up to 3.25", and the radar-estimated size reached 2.25" aloft. At 3.25" — baseball — this is severe, roof-replacing hail: close to every roof inside the footprint becomes a claim candidate.
Largest hailstone
3.25"
≈ baseball · the largest NEXRAD radar signature Homes in the hail footprint
263
Ground reports
4
4 hailThe most severe storm Bismarck has seen in the last 12 months
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
7.1 /10
- Hail size
- 81 /100
- Homes exposed
- 48 /100
- Ground truth
- 67 /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 Bismarck saw the hail — from two instruments
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.
NEXRAD radar signatures
Where NEXRAD flagged hail as the storm passed — point signatures from the radar, which indicate hail overhead rather than confirm what landed.
Max size
3.25"
Detections
4
Radar-estimated hail size
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.
Max size
2.25"
Where Jun 29, 2026 sits in Bismarck's hail record
This was Bismarck's 2nd recorded hail day, arriving 2 days after the Jun 27, 2026 storm. By severity it ranks 1st of the 6 storms we have logged here. Radar put the day's largest stone over Bismarck at 3.25" — the largest NEXRAD radar signature.
The Jun 29, 2026 convective day was bigger than Bismarck: the same system put hail over 702 other tracked cities, 96 of them in North Dakota. Nearest: Baldwin (8 miles northeast, up to 4"); Wilton (21 miles north, up to 4"); Mandan (21 miles south, up to 2.75").
These maps are stills from Bismarck's Jun 29, 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
4 reports Hail size 2"
7 N Bismarck Burleigh County
“Time estimated from radar. (BIS)”
— NOAA / SPC storm report
Hail size 1.75"
5 NNW Bismarck Burleigh County
“Off duty NWS employee reported golf ball size hail and 60 mph wind gusts. One window on house was broken. (BIS)”
— NOAA / SPC storm report
Hail size 2"
Mandan Morton County
“Trained weather spotter reports hail up to 2 inches in Mandan. Hail ranged from 1.5 to 2.0 inches in size... and lasted for around 5 minutes. Also report numerous 1 inc (BIS)”
— NOAA / SPC storm 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
Hail was reported over 13 minutes, from to .
Reports came from Mandan — beyond Bismarck itself.
What 3.25" hail means for Bismarck 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
$3.2M
Potential roof exposure — 263 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Illustrative jobs
1 job
Illustrative work
~$15K
Claims from this storm can typically be filed until around June 2028 — the window to reach these homeowners while it's still open. Deadlines vary by policy and state.
Track hail over Bismarck on the live map
Radar updates in real time, spotter reports appear on the map as they're filed, and the full Bismarck storm history — this Jun 29, 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
Bismarck hail history
← All hail in Bismarck 6 recorded storm days in Bismarck, ND
Other storms in Bismarck
Jul 24, 2026
2" Signatures 2" Estimated 1.25"
No ground reports filed 
Jul 19, 2026
2" Estimated 2"
5
ground reports 
Jul 9, 2026
1.75" Signatures 1.75" Estimated 1.25"
No ground reports filed 
Jul 3, 2026
0.75" Signatures 0.75" Estimated 0.5"
No ground reports filed 
Jun 27, 2026
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.