Hail in Grant Park · Mar 26, 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 · Mar 26, 2026 · noon–noon UTC
Severity
The 8th most severe storm Grant Park 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 Grant Park 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 26, 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 26, 2026 sits in Grant Park's hail record.
This was Grant Park's 2nd recorded hail day, arriving 16 days after the Mar 10, 2026 storm. By severity it ranks 8th of the 10 storms we have logged here. Radar put the day's largest stone over Grant Park at 0" — radar-estimated size aloft.
The Mar 26, 2026 convective day was bigger than Grant Park: the same system put hail over 316 other tracked cities, 103 of them in Illinois. Nearest: Hebron (24 miles east, up to 1.5"); South Holland (28 miles north, up to 1.75"); Tinley Park (28 miles north, up to 1.5").
These maps are stills. In the app this date is one of 10 Grant Park 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 Grant Park. 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 Grant Park 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
Grant Park hail history
Other storms in Grant Park.
Aug 11, 2026
1"
Estimated-size surface Jul 27, 2026
0.75"
NEXRAD surface Jul 20, 2026
Estimated-size surface Jul 18, 2026
0.5"
Estimated-size surface Jun 11, 2026
1"
NEXRAD surface May 4, 2026
Estimated-size surface Apr 13, 2026
1.25"
Estimated-size surface Mar 31, 2026
0.5"
Estimated-size surface Mar 10, 2026
2"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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