Hail in Boise City · May 21, 2026
The estimated-size surface reached 1" aloft; NEXRAD logged no point detections over Boise City that day. Open it on the live map to see the swath over the streets.
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Convective day · May 21, 2026 · noon–noon UTC
Severity
The 3rd most severe storm Boise City 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
- 63 /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 Boise City saw the hail — from two instruments
Two instruments, one storm: NEXRAD logs the point signatures it detected overhead, while the estimated-size surface models how large the hail aloft could have grown. Agreement between them is not guaranteed — the gaps are where the model ran ahead of, or behind, the detections.
Estimated size field Radar-estimated maximum hail size across the swath, modeled from radar aloft. It reflects the biggest stone the storm could support, which may differ from what actually fell.
Only the radar-estimated size surface resolved for May 21, 2026 — this storm produced no NEXRAD point detections over Boise City, so there is one map to show, not two.
The storm in context
Where May 21, 2026 sits in Boise City's hail record.
This was Boise City's 1st recorded hail day — the first hail day in our records for the city. By severity it ranks 3rd of the 5 storms we have logged here. Radar put the day's largest stone over Boise City at 1" — radar-estimated size aloft.
The May 21, 2026 convective day was bigger than Boise City: the same system put hail over 120 other tracked cities, 5 of them in Oklahoma. Nearest: Campo (28 miles north, up to 0.75"); Stratford (35 miles southeast, up to 0.75"); Guymon (46 miles east, up to 0.75").
These maps are stills. In the app this date is one of 5 Boise City 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 Boise City, 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 Boise City 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
$16M
Potential roof exposure — 1,342 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 7 jobs
- Illustrative work
- ~$105K
Close just 0.5% of the 1,342 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
May 2028
Claims from this storm can typically be filed until around May 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 $282 on top of the $150 plan.
Boise City hail history
Other storms in Boise City.
Estimated-size surface Aug 6, 2026
2"
Estimated-size surface Jun 25, 2026
3.25"
Estimated-size surface Jun 12, 2026
1"
Estimated-size surface Jun 3, 2026
1"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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