Hail size 1.75"
1 W Oak Brook DuPage County
“Time estimated via radar. (LOT)”
— NOAA / SPC storm report
/ Storm field report · DuPage
Hail in Downers Grove · Mar 30, 2026
NEXRAD logged 0 hail signatures up to 1.75"; the estimated-size surface reached 1.25" aloft. Open it on the live map to see the swath over the streets.
7-day free trial in the iPhone app. No card required to start.
For iPhone. Android coming soon.
Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.
Peak hail signal 1.75" ≈ golf ball · the largest NEXRAD radar signature
Homes in the hail footprint 41,382
Ground reports 5 5 hail
Radar surfaces 2 NEXRAD + estimated size
Convective day · Mar 30, 2026 · noon–noon UTC
Severity
The 2nd most severe storm Downers Grove has seen in the last 12 months
Composite score · 6.2 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
6.2 /10
- Peak hail signal
- 44 /100
- Homes exposed
- 92 /100
- Ground truth
- 83 /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 Downers Grove saw the hail — from two instruments
Mar 30, 2026 · Downers Grove, IL
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.
NEXRAD radar signatures Surface resolved
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.
Max size
1.75"
Detections
0
Radar-estimated hail size Surface resolved
Estimated size field Radar-estimated hail size over the swath. The model reports the biggest stone the storm could sustain in the air; what actually fell may have been smaller.
Max size
1.25"
The storm in context
Where Mar 30, 2026 sits in Downers Grove's hail record.
This was Downers Grove's 2nd recorded hail day, arriving 4 days after the Mar 26, 2026 storm. By severity it ranks 2nd of the 7 storms we have logged here. Radar put the day's largest stone over Downers Grove at 1.75" — the largest NEXRAD radar signature.
The Mar 30, 2026 convective day was bigger than Downers Grove: the same system put hail over 313 other tracked cities, 70 of them in Illinois. Nearest: Western Springs (5 miles east, up to 1.75"); Lisle (5 miles west, up to 1.75"); Lemont (7 miles south, up to 1.75").
These maps are stills. In the app this date is one of 7 Downers Grove 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
5 reports filed with the NWS
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.
Hail reports
5 reports Hail size 1"
1 S Oak Brook DuPage County
“Report relayed via EM. Time estimated from radar. (LOT)”
— NOAA / SPC storm report
Hail size 1.5"
1 SSW Oak Brook DuPage County
“Time estimated via radar. (LOT)”
— NOAA / SPC storm report
Hail size 1.5"
2 NNW Downers Grove DuPage County
“(LOT)”
— NOAA / SPC storm report
Hail size 1.25"
1 ENE Lisle DuPage County
“Photo shared via office service account showed hail ranging from 1 to 1.25 inches in diameter. (LOT)”
— NOAA / SPC storm report
Storm forensics
How the storm moved
Timing and place names from NOAA ground reports
Read from the arrival times and locations of the NOAA ground reports, not a radar-measured storm track.
Hail was reported over 14 minutes, from to .
Reports came from Oak Brook and Lisle — beyond Downers Grove itself.
High damage potential
What 1.75" hail means for Downers Grove roofs.
Hail around an inch and a half is capable of cracking shingles, stripping granules, and denting gutters, vents, and siding. Risk is usually greatest near the strongest radar signal, but property-level damage still requires an on-site inspection.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
41,382 homes × $12,000 avg. claim
Potential roof exposure
$497M
Potential roof exposure — 41,382 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 207 jobs
- Illustrative work
- ~$3.1M
Close just 0.5% of the 41,382 homes in this footprint at the average $15,000 roof job. Illustrative math, not a projection — your results depend on your outreach and how the market responds.
Claim window
March 2028
Claims from this storm can typically be filed until around March 2028 — the window to reach these homeowners while it's still open. Deadlines vary by policy and state.
Names and phones for every home in the footprint: at most $8,690 on top of the $150 plan.
Downers Grove hail history
Other storms in Downers Grove.
7 recorded storm days in Downers Grove, IL
Estimated-size surface Storm date Downers Grove / IL
Aug 9, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Downers Grove / IL
Jul 27, 2026
2.75" Estimated 2.75"
15 ground reports Open report →
Estimated-size surface Storm date Downers Grove / IL
Jun 13, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Downers Grove / IL
Jun 11, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Downers Grove / IL
Jun 10, 2026
0.75" Estimated 0.75"
1 ground report Open report →
NEXRAD surface Storm date Downers Grove / IL
Mar 26, 2026
1.25" Signatures 1.25"
No ground reports filed Open report →
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.
7-day free trial in the iPhone app. No card required to start.
For iPhone. Android coming soon.
Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.
A storm day here is a convective day — it runs from noon to noon
UTC, so late-night hail is grouped with the afternoon storm that
spawned it rather than split across two calendar dates. Ground
reports are public-domain observations from the NOAA Storm
Prediction Center. Radar tells you where to look. Only an inspection confirms damage at an address. Last updated Aug 10, 2026.