Hail in Petersburg · May 4, 2026
NEXRAD logged 0 hail signatures up to 1"; the estimated-size surface reached 0.5" aloft. Open it on the live map to see the swath over the streets.
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Convective day · May 4, 2026 · noon–noon UTC
Severity
The 4th most severe storm Petersburg 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
- 66 /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 Petersburg 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.
Radar signature field NEXRAD's hail signatures for this storm: the spots the radar detected from above. A detection overhead is not the same thing as a confirmed stone below.
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.
The storm in context
Where May 4, 2026 sits in Petersburg's hail record.
This was Petersburg's 3rd recorded hail day, arriving 7 days after the Apr 27, 2026 storm. By severity it ranks 4th of the 6 storms we have logged here. Radar put the day's largest stone over Petersburg at 1" — the largest NEXRAD radar signature.
The May 4, 2026 convective day was bigger than Petersburg: the same system put hail over 428 other tracked cities, 239 of them in Illinois. Nearest: Oakford (7 miles north, up to 1"); Pleasant Plains (11 miles south, up to 1.75"); Greenview (11 miles northeast, up to 1").
These maps are stills. In the app this date is one of 6 Petersburg 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.
Nobody on the ground filed a report over Petersburg for this date, which says more about who was watching than about the storm: spotter reports only exist where there is an observer. The radar surfaces above carry the evidence for this one.
Damage-capable hail signal
What 1" hail means for Petersburg 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
$23M
Potential roof exposure — 1,908 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 10 jobs
- Illustrative work
- ~$150K
Close just 0.5% of the 1,908 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 $401 on top of the $150 plan.
Petersburg hail history
Other storms in Petersburg.
Estimated-size surface Aug 21, 2026
1"
Estimated-size surface Jun 17, 2026
1.5"
Estimated-size surface Jun 11, 2026
0.75"
Estimated-size surface Apr 27, 2026
1.25"
Estimated-size surface Mar 15, 2026
0.5"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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