Hail in Grant Park May 4, 2026
NEXRAD caught this storm: 0 hail signatures up to 0". The radar-estimated size surface had no signal to model this day.
0"
≈ pea to penny · radar-estimated size aloft0
0
none filedThe 7th 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.
- Hail size
- 0 /100
- Homes exposed
- 0 /100
- Ground truth
- 0 /100
Largest hailstone — the top predictor of roof damage.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
How Grant Park saw the hail — from two instruments
The maps here read the same storm from two angles — point detections from NEXRAD, and modeled hail size aloft. Where the two disagree is informative: it marks where estimated size outran the signatures, or trailed them.
Where NEXRAD flagged hail as the storm passed — point signatures from the radar, which indicate hail overhead rather than confirm what landed.
Only the NEXRAD radar-signature surface resolved for May 4, 2026 — the estimated-size swath had no hail signal to model for this storm, so there is one map to show, not two.
Where May 4, 2026 sits in Grant Park's hail record
This was Grant Park's 5th recorded hail day, arriving 21 days after the Apr 13, 2026 storm. By severity it ranks 7th of the 9 storms we have logged here. Radar put the day's largest stone over Grant Park at 0" — radar-estimated size aloft.
The May 4, 2026 convective day was bigger than Grant Park: the same system put hail over 428 other tracked cities, 239 of them in Illinois. Nearest: Manhattan (12 miles northwest, up to 1"); Bourbonnais (12 miles southwest, up to 1"); Cedar Lake (12 miles northeast, up to 0").
These maps are stills from Grant Park's May 4, 2026 storm. In the Overview app the same surfaces are live — radar updating in real time, radar-estimated hail size as it forms, and NWS spotter reports pinned where they're filed — with a radar replay you can scrub back over any past day.
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 Grant Park 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.
What 0" hail means for Grant Park roofs
Hail under three-quarters of an inch stays below the National Weather Service severe threshold and rarely breaks shingles outright. But repeated small-hail events accelerate granule loss and shorten roof life — on older roofs, it's still worth a conversation.
Track hail over Grant Park on the live map
Radar updates in real time, spotter reports appear on the map as they're filed, and the full Grant Park storm history — this May 4, 2026 storm included — sits underneath. When you're ready, draw this storm's footprint and pull highly accurate homeowner contact information for every address inside it.
Highly accurate contact information starting at $0.23 per address — every contact included. Digital leads cost $15–$40. Start with a 7-day free trial — no credit card required. See pricing
9 recorded storm days in Grant Park, IL
Other storms in Grant Park
Jul 27, 2026
0.75"
Jul 20, 2026
Jul 18, 2026
0.5"
Jun 11, 2026
1"
Apr 13, 2026
1.25"
Mar 31, 2026
0.5"
Mar 26, 2026
Mar 10, 2026
2"