Hail in Simpson · Jul 31, 2026
NEXRAD logged 0 hail signatures up to 0"; 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 · Jul 31, 2026 · noon–noon UTC
Severity
The 6th most severe storm Simpson 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
- 0 /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 Simpson 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 Jul 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 Jul 31, 2026 sits in Simpson's hail record.
This was Simpson's 6th recorded hail day, arriving 28 days after the Jul 3, 2026 storm. By severity it ranks 6th of the 7 storms we have logged here. Radar put the day's largest stone over Simpson at 0" — radar-estimated size aloft.
The Jul 31, 2026 convective day was bigger than Simpson: the same system put hail over 238 other tracked cities, 4 of them in Illinois. Nearest: Salem (23 miles east, up to 0"); Villa Ridge (31 miles southwest, up to 1"); Tamms (34 miles west, up to 1").
These maps are stills. In the app this date is one of 7 Simpson 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.
No ground reports were filed with the National Weather Service for this storm over Simpson. That is common: a report depends on someone being there to see it and take the time to call it in. The radar surfaces above are the record here — the storm was detected from above even though no one on the ground logged it.
Below the severe threshold
What 0" hail means for Simpson roofs.
Radar signals under three-quarters of an inch stay below the National Weather Service severe threshold and generally indicate lower roof risk. Older or already-worn materials can still show effects, but radar alone cannot determine whether a specific roof was damaged.
Radar reading · not confirmed damage
Simpson hail history
Other storms in Simpson.
Estimated-size surface Aug 19, 2026
0.5"
Estimated-size surface Jul 3, 2026
1.75"
Estimated-size surface May 31, 2026
1"
Estimated-size surface Apr 27, 2026
2.75"
NEXRAD surface Mar 15, 2026
Estimated-size surface Mar 4, 2026
2.5"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.