Hail in Illiopolis · Mar 31, 2026
NEXRAD logged 0 hail signatures up to 1"; the estimated-size surface had no signal that day. Open it on the live map to see the swath over the streets.
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Convective day · Mar 31, 2026 · noon–noon UTC
Severity
The 3rd most severe storm Illiopolis 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
- 0 /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 Illiopolis 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.
Only the NEXRAD radar-signature surface resolved for Mar 31, 2026 — the estimated-size swath had no hail signal to model for this storm, so there is one map to show, not two.
The storm in context
Where Mar 31, 2026 sits in Illiopolis's hail record.
This was Illiopolis's 2nd recorded hail day, arriving 28 days after the Mar 3, 2026 storm. By severity it ranks 3rd of the 5 storms we have logged here. Radar put the day's largest stone over Illiopolis at 1" — the largest NEXRAD radar signature.
The Mar 31, 2026 convective day was bigger than Illiopolis: the same system put hail over 522 other tracked cities, 114 of them in Illinois. Nearest: Mount Auburn (4 miles southeast, up to 1"); Mount Pulaski (11 miles north, up to 0.75"); Edinburg (11 miles south, up to 0").
These maps are stills. In the app this date is one of 5 Illiopolis 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 Illiopolis, 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 Illiopolis 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
Illiopolis hail history
Other storms in Illiopolis.
Estimated-size surface Jun 17, 2026
2.5"
Estimated-size surface May 4, 2026
1"
Estimated-size surface Apr 27, 2026
2"
Estimated-size surface Mar 3, 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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Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.