“Report from mPING Half Dollar. (DLH)”
— NOAA / SPC storm report
Hail in Hayward · May 26, 2026
Convective day · May 26, 2026 · noon–noon UTC
Severity
The 2nd most severe storm Hayward 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
- 67 /100
- Ground truth
- 33 /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 Hayward 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 26, 2026 — this storm produced no NEXRAD point detections over Hayward, so there is one map to show, not two.
The storm in context
Where May 26, 2026 sits in Hayward's hail record.
This was Hayward's 2nd recorded hail day, arriving 39 days after the Apr 17, 2026 storm. By severity it ranks 2nd of the 3 storms we have logged here. Radar put the day's largest stone over Hayward at 1" — radar-estimated size aloft.
The May 26, 2026 convective day was bigger than Hayward: the same system put hail over 259 other tracked cities, 12 of them in Wisconsin. Nearest: Stone Lake (16 miles southwest, up to 0.5"); Springbrook (17 miles west, up to 0.75"); Exeland (19 miles southwest, up to 0.5").
These maps are stills. In the app this date is one of 3 Hayward 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.
Hail reports
2 reports“Estimated quarter-size hail. Appearance in photos suggests larger than quarters. (DLH)”
— NOAA / SPC storm report
Storm forensics
How the storm moved
Read from the arrival times and locations of the NOAA ground reports, not a radar-measured storm track.
Hail was reported over 20 minutes, from to .
Reports came from Little Round Lake — beyond Hayward itself.
Damage-capable hail signal
What 1" hail means for Hayward 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
$27M
Potential roof exposure — 2,247 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 11 jobs
- Illustrative work
- ~$165K
Close just 0.5% of the 2,247 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 $472 on top of the $150 plan.
Hayward hail history
Other storms in Hayward.
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