Hail in Decatur · 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 7th most severe storm Decatur 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 Decatur saw the hail — from two instruments
Each storm gets two readings: the radar signatures NEXRAD recorded as the cells passed overhead, and a modeled estimate of hail size in the air. They are independent surfaces, so a mismatch between them is expected — and worth reading.
Radar signature field The point detections NEXRAD recorded overhead. Each signature marks where the radar saw hail aloft — it is a detection, not a stone measured on the ground.
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 Decatur's hail record.
This was Decatur's 2nd recorded hail day, arriving 28 days after the Mar 3, 2026 storm. By severity it ranks 7th of the 8 storms we have logged here. Radar put the day's largest stone over Decatur at 1" — the largest NEXRAD radar signature.
The Mar 31, 2026 convective day was bigger than Decatur: the same system put hail over 522 other tracked cities, 114 of them in Illinois. Nearest: Argenta (9 miles northeast, up to 0"); Warrensburg (13 miles northwest, up to 0.75"); Mount Auburn (14 miles west, up to 1").
These maps are stills. In the app this date is one of 8 Decatur 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.
The National Weather Service logged no spotter reports for this storm over Decatur. That absence is ordinary — filing a report takes a person on the spot who saw the hail and phoned it in. What stands as the record for this date is the radar above, which caught the storm regardless.
Damage-capable hail signal
What 1" hail means for Decatur 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
Decatur hail history
Other storms in Decatur.
Estimated-size surface Jul 3, 2026
1"
Estimated-size surface Jun 17, 2026
2.75"
Estimated-size surface Jun 11, 2026
0.5"
Estimated-size surface Jun 10, 2026
0.5"
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.